subject:(Mining Engineering)

West Virginia University

1. Nolan, Timothy A. Production and Cost Assessment of a Potential Application of Surface Miners in Coal Mining in West Virginia.

Degree: MS, Mining Engineering, 2012, West Virginia University

URL: https://doi.org/10.33915/etd.3337 ; https://researchrepository.wvu.edu/etd/3337

► The broad objective of this research was to improve current mining practices and reduce negative environmental impact of surface coal mining in West Virginia (WV).… (more)

▼ The broad objective of this research was to improve current mining practices and reduce negative environmental impact of surface coal mining in West Virginia (WV). The specific objectives were to (i) build the production and cost models to determine if conventional surface mining unit operations such as drilling, blasting, digging, loading, and crushing can be replaced with one mining machine called a surface miner (SM), (ii) apply the analytical hierarchy process (AHP) to help select the optimal mining method, and (iii) determine the extent of which the SM would benefit surface coal mining in WV, particularly by reducing some of the negative environmental impacts associated with current extraction practices.;The entire production and cost models were developed in MS Excel. The design and the procedures used for achieving the objectives involved six interrelated modules. Module1 includes rock properties of sandstone, shale, which are the predominant overburden and interburden materials in WV, and sub-bituminous coal. Module #2 considers drilling and blasting operations. Module #3 includes digging and loading of overburden material. It specifically addresses mining equipment such as electric and hydraulic shovels and front-end wheel loaders. Interburden material also includes sandstone and shale, and the two unit operations involved are ripping and pushing by bulldozers and loading by hydraulic backhoe shovel. Module #4 covers coal extraction by hydraulic backhoe shovel and the crushing operation. Module #5 focuses on the SM, while Module #6 is used to conduct comparative analyses among all mining unit operations for overburden, interburden, and coal. The resulting production rates, ownership, and operating costs were also presented. The analytical hierarchy process (AHP) was used to help select the optimal mining method based on both qualitative and quantitative factors.;Based on the results of this research, application of SM would benefit coal extraction in surface mining operations in WV. The estimated cost of coal extraction is lower than with conventional mining methods, and the machine is able to work selectively with high separation accuracy. Thin seams of coal and overburden can be mined separately, thus preventing dilution with interburden material. Rising operating costs for the SM become an issue as the quantity of material being extracted increases and higher values of unconfined compressive strength are encountered. Cutting tools on the drum wear out faster and require more changes and, at a certain point, the SM becomes unfeasible because of the time and cost involved in changing cutting tools. A significant advantage of SM, where applicable, is the elimination of the negative environmental impacts associated with blasting. Advisors/Committee Members: Vladislav Kecojevic..

Subjects/Keywords: Mining engineering

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APA (6^th Edition):

Nolan, T. A. (2012). Production and Cost Assessment of a Potential Application of Surface Miners in Coal Mining in West Virginia. (Thesis). West Virginia University. Retrieved from https://doi.org/10.33915/etd.3337 ; https://researchrepository.wvu.edu/etd/3337

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Nolan, Timothy A. “Production and Cost Assessment of a Potential Application of Surface Miners in Coal Mining in West Virginia.” 2012. Thesis, West Virginia University. Accessed January 20, 2021. https://doi.org/10.33915/etd.3337 ; https://researchrepository.wvu.edu/etd/3337.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Nolan, Timothy A. “Production and Cost Assessment of a Potential Application of Surface Miners in Coal Mining in West Virginia.” 2012. Web. 20 Jan 2021.

Vancouver:

Nolan TA. Production and Cost Assessment of a Potential Application of Surface Miners in Coal Mining in West Virginia. [Internet] [Thesis]. West Virginia University; 2012. [cited 2021 Jan 20]. Available from: https://doi.org/10.33915/etd.3337 ; https://researchrepository.wvu.edu/etd/3337.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Nolan TA. Production and Cost Assessment of a Potential Application of Surface Miners in Coal Mining in West Virginia. [Thesis]. West Virginia University; 2012. Available from: https://doi.org/10.33915/etd.3337 ; https://researchrepository.wvu.edu/etd/3337

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

West Virginia University

2. Qiu, Biao. Applications of Surface and Subsurface Subsidence Theories to Solve Ground Control Problems.

Degree: PhD, Mining Engineering, 2013, West Virginia University

URL: https://doi.org/10.33915/etd.178 ; https://researchrepository.wvu.edu/etd/178

► The stability of the underground mine openings largely depends on the surrounding ground conditions, such as stress concentrations, geological conditions and support intensities etc. In… (more)

▼ The stability of the underground mine openings largely depends on the surrounding ground conditions, such as stress concentrations, geological conditions and support intensities etc. In particular, the ground control stability associated with large movements and deformations of the strata is much more complicated and could induce much more severe safety problems. A ground control failure could endanger the coal miner's safety not only directly by roof, pillar, floor and/or rib failure, but also by ground cracks induced methane and water inundations indirectly. This study is aimed to develop comprehensive models to simulate the ground response to mining and solve the ground control problems associated with it.;During the last four decades, many research works have been conducted on the ground control study, and numerous models, including analytical, empirical, numerical and hybrid models, were developed to facilitate ground control and support design. If a model is to be used as a common mine design tool, the simplicity of the model itself and the consistency between actual in-mine and modeled ground response to mining are essential. For the study of the ground control stability associated with large movements and deformations, the key is to know the movements and deformations of the subsurface strata. The subsidence prediction models can determine the movements and deformations very accurately as proven by plenty of surface subsidence survey data. In this study, the subsidence prediction models are employed to analyze the stability of some subsidence related ground control problems based on the subsurface strata movements and deformations.;In this dissertation, an innovative approach, employing the influence function method while considering the hard rock layers, is applied in the development of an enhanced subsurface subsidence prediction model. This improved model is then applied in analyzing three specific subsidence related ground control problems. An analytical model, employing dynamic subsurface subsidence theory and considering the roof support interaction, is developed to analyze the stability of pre-driven longwall recovery room. The mechanism of the ground control stability problems as well as the potential safety problems associated with multi-seam mining interactions is discussed. Multi-seam mining subsidence prediction methods are re-examined based on the multi-seam mining interaction analysis. The redistribution of the stresses and strains in overburden is also able to affect the surface and subsurface water bodies in various degrees. Mathematical models are developed to link longwall induced overburden strata permeability change and subsurface deformations. A ground water flow model is used to assess the longwall mining impacts on surface and subsurface hydrological systems.;This study provides a greater understanding of the mechanism of the subsidence-related ground control problems. Innovative methods are developed to derive stress, strain and permeability change, and quantify the subsidence effects… Advisors/Committee Members: Yi Luo, Keith A. Heasley, Bruce Kang.

Subjects/Keywords: Mining engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Qiu, B. (2013). Applications of Surface and Subsurface Subsidence Theories to Solve Ground Control Problems. (Doctoral Dissertation). West Virginia University. Retrieved from https://doi.org/10.33915/etd.178 ; https://researchrepository.wvu.edu/etd/178

Chicago Manual of Style (16^th Edition):

Qiu, Biao. “Applications of Surface and Subsurface Subsidence Theories to Solve Ground Control Problems.” 2013. Doctoral Dissertation, West Virginia University. Accessed January 20, 2021. https://doi.org/10.33915/etd.178 ; https://researchrepository.wvu.edu/etd/178.

MLA Handbook (7^th Edition):

Qiu, Biao. “Applications of Surface and Subsurface Subsidence Theories to Solve Ground Control Problems.” 2013. Web. 20 Jan 2021.

Vancouver:

Qiu B. Applications of Surface and Subsurface Subsidence Theories to Solve Ground Control Problems. [Internet] [Doctoral dissertation]. West Virginia University; 2013. [cited 2021 Jan 20]. Available from: https://doi.org/10.33915/etd.178 ; https://researchrepository.wvu.edu/etd/178.

Council of Science Editors:

Qiu B. Applications of Surface and Subsurface Subsidence Theories to Solve Ground Control Problems. [Doctoral Dissertation]. West Virginia University; 2013. Available from: https://doi.org/10.33915/etd.178 ; https://researchrepository.wvu.edu/etd/178

West Virginia University

3. Sears, Morgan M. Calibrating the LaModel Program for Shallow Cover Multiple-Seam Mines.

Degree: PhD, Mining Engineering, 2013, West Virginia University

URL: https://doi.org/10.33915/etd.676 ; https://researchrepository.wvu.edu/etd/676

► Stable underground mine openings are fundamental to ensuring the safety of miners and providing a safe work environment. During the past decade, approximately 40% of… (more)

▼ Stable underground mine openings are fundamental to ensuring the safety of miners and providing a safe work environment. During the past decade, approximately 40% of underground mining fatalities were caused by roof falls, rib collapses, or bumps/bursts, 19% of which occurred during retreat mining (Pappas and Mark, 2012). In addition, approximately 600 miners are non-fatally injured (often severely) every year by rock falls in coal mines (Pappas and Mark, 2012).;To help with designing stable mine pillars in deep-cover situations, a new calibration method for deep-cover pillar retreat mining was developed and implemented into the LaModel 3.0 program a few years ago (Heasley et al., 2010). This calibrated method was demonstrated to have very good results with a limited database of 47 deep-cover case histories, where a stability factor (SF) of 1.40 or above showed a 90% chance of success. During the development of the deep-cover calibration method for LaModel 3.0, there was nothing fundamental in the derivation that limited the method to only deep-cover mines; however, the method has not been specifically validated for shallow-cover mines.;This research work seeks to extend calibration of the LaModel program to shallow-cover mines. To perform this expansion, 40 shallow cover case histories from 12 different mines were obtained. The difficulty in finding shallow-cover failure cases for single seam mines necessitated creating a database which also included multiple-seam interactions. In general, with shallow cover, most mines were very successful, unless some type of multiple-seam stress became involved.;An initial analysis of the data showed two distinct failure populations, one comprised of inadequately sized pillars for global stability (mostly massive collapses) and one where local entry stability (massive roof falls or floor heave) was compromised by pillar stresses, weak roof/floor and/or multiple seam stresses. This distinction in failure mode required analyzing the database in two steps. First, an adequate pillar safety factor for global design stability was determined based on the pillar failure subset of the data. Then, once global stability was confirmed, the entry stability was analyzed separately to quantify the significance of parameters such as depth, coal mine roof rating (CMRR), entry stresses, etc. to the local stability of the entry.;Statistical analysis of the pillar failure subset of the data indicated that a SF of 2.0 or above resulted in an approximate 90% chance of maintaining global stability. Then, for the entry stability subset of the data, it was found that the CMRR and the multiple seam stress were most significant in predicting success or failure. With the addition of these two parameters, entry stability was able to be predicted with an approximate 75% accuracy.;Incorporating a shallow-cover, calibration technique into the LaModel program further enhances the most widely used boundary-element model to help develop stable pillar design at all depths. With the addition of this shallow-cover… Advisors/Committee Members: Keith A. Heasley, Christopher Bise, Yi Luo.

Subjects/Keywords: Mining engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sears, M. M. (2013). Calibrating the LaModel Program for Shallow Cover Multiple-Seam Mines. (Doctoral Dissertation). West Virginia University. Retrieved from https://doi.org/10.33915/etd.676 ; https://researchrepository.wvu.edu/etd/676

Chicago Manual of Style (16^th Edition):

Sears, Morgan M. “Calibrating the LaModel Program for Shallow Cover Multiple-Seam Mines.” 2013. Doctoral Dissertation, West Virginia University. Accessed January 20, 2021. https://doi.org/10.33915/etd.676 ; https://researchrepository.wvu.edu/etd/676.

MLA Handbook (7^th Edition):

Sears, Morgan M. “Calibrating the LaModel Program for Shallow Cover Multiple-Seam Mines.” 2013. Web. 20 Jan 2021.

Vancouver:

Sears MM. Calibrating the LaModel Program for Shallow Cover Multiple-Seam Mines. [Internet] [Doctoral dissertation]. West Virginia University; 2013. [cited 2021 Jan 20]. Available from: https://doi.org/10.33915/etd.676 ; https://researchrepository.wvu.edu/etd/676.

Council of Science Editors:

Sears MM. Calibrating the LaModel Program for Shallow Cover Multiple-Seam Mines. [Doctoral Dissertation]. West Virginia University; 2013. Available from: https://doi.org/10.33915/etd.676 ; https://researchrepository.wvu.edu/etd/676

West Virginia University

4. Cheng, Jianwei. Comprehensive and Integrated Model for Atmospheric Status in Sealed Underground Mine Areas.

Degree: PhD, Mining Engineering, 2012, West Virginia University

URL: https://doi.org/10.33915/etd.3611 ; https://researchrepository.wvu.edu/etd/3611

► Mine gas explosion is one of the most feared hazards in the coal industry worldwide. More often one gas explosion related accident can cause the… (more)

▼ Mine gas explosion is one of the most feared hazards in the coal industry worldwide. More often one gas explosion related accident can cause the death of multiple coal miners. Since the beginning of coal mining, numerous mine workers have lost their lives as a result of gas explosions. Such occurrences have long been a major concern for mining engineers. Examination of two coal mine disasters (Sago mine and UBB mine) that have occurred in the U.S. in recent years reveals that all explosions originated from or around the sealed areas. Therefore, a good understanding of the atmospheric status in a sealed coal mine area is crucial in preventing and reducing accidents associated with mine combustible gases and also for planning and implementing a mine rescue strategy. Due to the lack of comprehensive research carried out so far in this area, this dissertation work seeks to contribute to understanding the behavior of a coal mine sealed volume and improving safety in coal mines. The following improvements have been made in this research:;• Important influential factors to control the mine atmospheric compositions has been investigated and analyzed. They are: (1) effect of the barometric pressure change; (2) effect of coal mine seals; and (3) categories of gases making up the sealed atmosphere and their changing characteristics.;• Based on the principle of mass conservation and the ideal gas law, a stepwise dynamic mathematical model that uses the control volume approach to simulate the sealed mine atmospheric gas species changes over time has been developed. All the above mentioned influential factors have been incorporated into the mathematical model.;• A modified Coward explosibility diagram method is proposed to analyze the explosive mine atmosphere. The improvements include: (1) expanding the original Coward diagram; (2) corrections of flammable limits; (3) redefining the nose limit for each combustible gas; (4) developing an equation to predict the excess amount of inert gas for each combustible gas; and (5) introducing the concept of explosibility Safety Factor (SF) which improves the Coward diagram's further applications.;In order to facilitate these researches findings and improvements, a new software program, CIMMAS (Comprehensive and Integrated Model for Mine Atmospheric Status), has been developed. The program is coded using an object-oriented programming (OOP) language, Visual Basic 6.0. It offers friendly graphical user interfaces with schematic views and allows users to reduce input works and understand the program outputs. Advisors/Committee Members: Yi Luo..

Subjects/Keywords: Mining engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Cheng, J. (2012). Comprehensive and Integrated Model for Atmospheric Status in Sealed Underground Mine Areas. (Doctoral Dissertation). West Virginia University. Retrieved from https://doi.org/10.33915/etd.3611 ; https://researchrepository.wvu.edu/etd/3611

Chicago Manual of Style (16^th Edition):

Cheng, Jianwei. “Comprehensive and Integrated Model for Atmospheric Status in Sealed Underground Mine Areas.” 2012. Doctoral Dissertation, West Virginia University. Accessed January 20, 2021. https://doi.org/10.33915/etd.3611 ; https://researchrepository.wvu.edu/etd/3611.

MLA Handbook (7^th Edition):

Cheng, Jianwei. “Comprehensive and Integrated Model for Atmospheric Status in Sealed Underground Mine Areas.” 2012. Web. 20 Jan 2021.

Vancouver:

Cheng J. Comprehensive and Integrated Model for Atmospheric Status in Sealed Underground Mine Areas. [Internet] [Doctoral dissertation]. West Virginia University; 2012. [cited 2021 Jan 20]. Available from: https://doi.org/10.33915/etd.3611 ; https://researchrepository.wvu.edu/etd/3611.

Council of Science Editors:

Cheng J. Comprehensive and Integrated Model for Atmospheric Status in Sealed Underground Mine Areas. [Doctoral Dissertation]. West Virginia University; 2012. Available from: https://doi.org/10.33915/etd.3611 ; https://researchrepository.wvu.edu/etd/3611

West Virginia University

5. Terrazas Prado, Patricio G. Truck Cycle and Delay Automated Data Collection System (TCD-ADCS) for Surface Coal Mining.

Degree: MS, Mining Engineering, 2012, West Virginia University

URL: https://doi.org/10.33915/etd.4930 ; https://researchrepository.wvu.edu/etd/4930

► Data management of production records has become a key element in surface coal mining operations. Information systems (IS) and information technologies (IT) can be used… (more)

Subjects/Keywords: Mining engineering

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APA (6^th Edition):

Terrazas Prado, P. G. (2012). Truck Cycle and Delay Automated Data Collection System (TCD-ADCS) for Surface Coal Mining. (Thesis). West Virginia University. Retrieved from https://doi.org/10.33915/etd.4930 ; https://researchrepository.wvu.edu/etd/4930

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Terrazas Prado, Patricio G. “Truck Cycle and Delay Automated Data Collection System (TCD-ADCS) for Surface Coal Mining.” 2012. Thesis, West Virginia University. Accessed January 20, 2021. https://doi.org/10.33915/etd.4930 ; https://researchrepository.wvu.edu/etd/4930.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Terrazas Prado, Patricio G. “Truck Cycle and Delay Automated Data Collection System (TCD-ADCS) for Surface Coal Mining.” 2012. Web. 20 Jan 2021.

Vancouver:

Terrazas Prado PG. Truck Cycle and Delay Automated Data Collection System (TCD-ADCS) for Surface Coal Mining. [Internet] [Thesis]. West Virginia University; 2012. [cited 2021 Jan 20]. Available from: https://doi.org/10.33915/etd.4930 ; https://researchrepository.wvu.edu/etd/4930.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Terrazas Prado PG. Truck Cycle and Delay Automated Data Collection System (TCD-ADCS) for Surface Coal Mining. [Thesis]. West Virginia University; 2012. Available from: https://doi.org/10.33915/etd.4930 ; https://researchrepository.wvu.edu/etd/4930

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

West Virginia University

6. Vukotic, Ivana M. Evaluation of Rope Shovel Operators in Surface Coal Mining Using a Multi-Attribute Decision-Making Model.

Degree: MS, Mining Engineering, 2013, West Virginia University

URL: https://doi.org/10.33915/etd.176 ; https://researchrepository.wvu.edu/etd/176

► Rope shovels are used to dig and load material in surface mines. One of the main factors that influence the productivity and energy consumption of… (more)

Subjects/Keywords: Mining engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Vukotic, I. M. (2013). Evaluation of Rope Shovel Operators in Surface Coal Mining Using a Multi-Attribute Decision-Making Model. (Thesis). West Virginia University. Retrieved from https://doi.org/10.33915/etd.176 ; https://researchrepository.wvu.edu/etd/176

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Vukotic, Ivana M. “Evaluation of Rope Shovel Operators in Surface Coal Mining Using a Multi-Attribute Decision-Making Model.” 2013. Thesis, West Virginia University. Accessed January 20, 2021. https://doi.org/10.33915/etd.176 ; https://researchrepository.wvu.edu/etd/176.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Vukotic, Ivana M. “Evaluation of Rope Shovel Operators in Surface Coal Mining Using a Multi-Attribute Decision-Making Model.” 2013. Web. 20 Jan 2021.

Vancouver:

Vukotic IM. Evaluation of Rope Shovel Operators in Surface Coal Mining Using a Multi-Attribute Decision-Making Model. [Internet] [Thesis]. West Virginia University; 2013. [cited 2021 Jan 20]. Available from: https://doi.org/10.33915/etd.176 ; https://researchrepository.wvu.edu/etd/176.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Vukotic IM. Evaluation of Rope Shovel Operators in Surface Coal Mining Using a Multi-Attribute Decision-Making Model. [Thesis]. West Virginia University; 2013. Available from: https://doi.org/10.33915/etd.176 ; https://researchrepository.wvu.edu/etd/176

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

West Virginia University

7. Prassetyo, Simon H. The influence of interface friction and w/h ratio on the violence of coal specimen failure.

Degree: MS, Mining Engineering, 2011, West Virginia University

URL: https://doi.org/10.33915/etd.2225 ; https://researchrepository.wvu.edu/etd/2225

► Violent failures of coal pillars, known in practice as coal mine bumps, have long been a subject of investigation. Many field investigations have considered geological… (more)

▼ Violent failures of coal pillars, known in practice as coal mine bumps, have long been a subject of investigation. Many field investigations have considered geological conditions that create high stress in the pillar as the main causative factor leading to bumps. In recent years, stress and constraint have been shown to be necessary in producing coal burst.;This research investigated the influence of interface friction and w/h ratio on the violence of coal specimen failure. In satisfying this objective, three violent failure parameters such as peak SPL, core zone failure, and ultimate stress were used to assess the violence of failure. The degree of the violence were investigated at three different interface frictions (high: mu = 0.40, medium: mu = 0.22, and low: mu = 0.13) and six w/h ratios (w/h = 3, 4, 6, 8, 12, and 16). The specimens were axially loaded in a universal testing machine equipped with a microphone to record sound pressure waves for peak SPL calculation. The failed specimens were also photographed after the failure for the measurement of core zones.;The violence of coal specimen failure was found to decrease with increasing w/h ratio and decreasing interface friction. In terms of peak SPL and ultimate stress, the influence of interface friction in reducing the violence was more significant for coal specimens at high w/h ratios than it was at low w/h ratios.;The high peak SPL region ≥ 124 dB was shown to be the most reliable parameter for assessing the violence of coal specimen failure, while the application of core zone failure depends on w/h ratio. Violent failure was also found to be independent of high ultimate stress. Stress merely contributes to the failure of the specimen, but it is the interface friction that greatly influences the degree of the violence.;There are four friction zones on the top end-surface of a coal specimen that may indicate the variation of confinement within the specimen. By the increase of w/h ratio, the zone of confinement was found to increase. Moreover, at the same interface friction, the increase of the confinement may also reduce the violence of failure.;Keywords: Coal specimen, violent failure, interface friction, w/h ratio, coal mine bumps, core zone, confinement. Advisors/Committee Members: Syd S. Peng..

Subjects/Keywords: Mining engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Prassetyo, S. H. (2011). The influence of interface friction and w/h ratio on the violence of coal specimen failure. (Thesis). West Virginia University. Retrieved from https://doi.org/10.33915/etd.2225 ; https://researchrepository.wvu.edu/etd/2225

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Prassetyo, Simon H. “The influence of interface friction and w/h ratio on the violence of coal specimen failure.” 2011. Thesis, West Virginia University. Accessed January 20, 2021. https://doi.org/10.33915/etd.2225 ; https://researchrepository.wvu.edu/etd/2225.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Prassetyo, Simon H. “The influence of interface friction and w/h ratio on the violence of coal specimen failure.” 2011. Web. 20 Jan 2021.

Vancouver:

Prassetyo SH. The influence of interface friction and w/h ratio on the violence of coal specimen failure. [Internet] [Thesis]. West Virginia University; 2011. [cited 2021 Jan 20]. Available from: https://doi.org/10.33915/etd.2225 ; https://researchrepository.wvu.edu/etd/2225.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Prassetyo SH. The influence of interface friction and w/h ratio on the violence of coal specimen failure. [Thesis]. West Virginia University; 2011. Available from: https://doi.org/10.33915/etd.2225 ; https://researchrepository.wvu.edu/etd/2225

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

West Virginia University

8. Verma, Priyesh. An experimental investigation of the creep behavior of an underground coalmine roof with shale formation.

Degree: MS, Mining Engineering, 2013, West Virginia University

URL: https://doi.org/10.33915/etd.677 ; https://researchrepository.wvu.edu/etd/677

► Stability of the roof in an underground coalmine is imperative for safe and efficient mining. Mining of the coal seam disturbs the natural equilibrium of… (more)

▼ Stability of the roof in an underground coalmine is imperative for safe and efficient mining. Mining of the coal seam disturbs the natural equilibrium of the in-situ stresses in the surrounding rock. Because of the opening, the surrounding stratum deforms to fill the opening and return to the pre-mining stress state. Such deformation, if allowed to continue, will lead to failure of the strata, which creates an unsafe work environment. Therefore, supports are used to reinforce the deforming strata and help prevent any further deformation in the rock.;However, various mines have reported failures in the supported entries (MSHA, 2013). These failures have been mostly called as "cutter-failure" (Peng, 2008) and are attributed to high horizontal stresses; however, surprisingly, another factor which is suspected to have an effect on such failure is the time-dependent deformation. Its effect on the roof fall activity is unknown and to the authors knowledge limited research has been reported on this subject. Additionally, organizations such as the ISRM (International Society of Rock Mechanics) and the ASTM (American Society for Testing and Materials) have not recommended any creep testing procedure. Therefore, the objective of this research was to investigate the time-dependent deformational behavior of immediate coal measures rock (shale) and then use phenomenological equations to fit the experimental data and produce input properties for numerical modeling.;Creep, or time-dependent, experiments were performed on shale and sandstone specimens under constant load and stress conditions. Both rock types showed development of creep strain; however, the shale specimens were more sensitive to the change in the stress conditions. Under uniaxial stress conditions, the specimens showed an increase in the creep strain as the stress increased. In triaxial conditions, the creep strain increased with an increase in the deviatoric stress conditions. It is believed that this research will provide some preliminary information on the time-dependent behavior of shale. Advisors/Committee Members: Brijes Mishra, Keith A. Heasley, Yi Luo.

Subjects/Keywords: Mining engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Verma, P. (2013). An experimental investigation of the creep behavior of an underground coalmine roof with shale formation. (Thesis). West Virginia University. Retrieved from https://doi.org/10.33915/etd.677 ; https://researchrepository.wvu.edu/etd/677

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Verma, Priyesh. “An experimental investigation of the creep behavior of an underground coalmine roof with shale formation.” 2013. Thesis, West Virginia University. Accessed January 20, 2021. https://doi.org/10.33915/etd.677 ; https://researchrepository.wvu.edu/etd/677.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Verma, Priyesh. “An experimental investigation of the creep behavior of an underground coalmine roof with shale formation.” 2013. Web. 20 Jan 2021.

Vancouver:

Verma P. An experimental investigation of the creep behavior of an underground coalmine roof with shale formation. [Internet] [Thesis]. West Virginia University; 2013. [cited 2021 Jan 20]. Available from: https://doi.org/10.33915/etd.677 ; https://researchrepository.wvu.edu/etd/677.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Verma P. An experimental investigation of the creep behavior of an underground coalmine roof with shale formation. [Thesis]. West Virginia University; 2013. Available from: https://doi.org/10.33915/etd.677 ; https://researchrepository.wvu.edu/etd/677

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

West Virginia University

9. Sindelar, Mark F. The Integration of a Coal Mine Emergency Communication Network into Pre-Mine Planning and Development.

Degree: MS, Mining Engineering, 2013, West Virginia University

URL: https://doi.org/10.33915/etd.174 ; https://researchrepository.wvu.edu/etd/174

► Regulations, such as the MINER Act of 2006, require the installation of redundant and secondary communication systems to assure that contact can be established with… (more)

Subjects/Keywords: Mining engineering

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APA (6^th Edition):

Sindelar, M. F. (2013). The Integration of a Coal Mine Emergency Communication Network into Pre-Mine Planning and Development. (Thesis). West Virginia University. Retrieved from https://doi.org/10.33915/etd.174 ; https://researchrepository.wvu.edu/etd/174

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Sindelar, Mark F. “The Integration of a Coal Mine Emergency Communication Network into Pre-Mine Planning and Development.” 2013. Thesis, West Virginia University. Accessed January 20, 2021. https://doi.org/10.33915/etd.174 ; https://researchrepository.wvu.edu/etd/174.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Sindelar, Mark F. “The Integration of a Coal Mine Emergency Communication Network into Pre-Mine Planning and Development.” 2013. Web. 20 Jan 2021.

Vancouver:

Sindelar MF. The Integration of a Coal Mine Emergency Communication Network into Pre-Mine Planning and Development. [Internet] [Thesis]. West Virginia University; 2013. [cited 2021 Jan 20]. Available from: https://doi.org/10.33915/etd.174 ; https://researchrepository.wvu.edu/etd/174.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Sindelar MF. The Integration of a Coal Mine Emergency Communication Network into Pre-Mine Planning and Development. [Thesis]. West Virginia University; 2013. Available from: https://doi.org/10.33915/etd.174 ; https://researchrepository.wvu.edu/etd/174

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

West Virginia University

10. Chen, Jinxiang. Column Flotation of Subbituminous Coal Using the Blend of Trimethyl Pentanediol Derivatives and Pico-Nano Bubbles.

Degree: MS, Mining Engineering, 2013, West Virginia University

URL: https://doi.org/10.33915/etd.3384 ; https://researchrepository.wvu.edu/etd/3384

► Subbituminous coal, a low rank of coal, is difficult-to-float using the conventional flotation process by a single frother such as MIBC and a single collector… (more)

Subjects/Keywords: Mining engineering

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APA (6^th Edition):

Chen, J. (2013). Column Flotation of Subbituminous Coal Using the Blend of Trimethyl Pentanediol Derivatives and Pico-Nano Bubbles. (Thesis). West Virginia University. Retrieved from https://doi.org/10.33915/etd.3384 ; https://researchrepository.wvu.edu/etd/3384

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Chen, Jinxiang. “Column Flotation of Subbituminous Coal Using the Blend of Trimethyl Pentanediol Derivatives and Pico-Nano Bubbles.” 2013. Thesis, West Virginia University. Accessed January 20, 2021. https://doi.org/10.33915/etd.3384 ; https://researchrepository.wvu.edu/etd/3384.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Chen, Jinxiang. “Column Flotation of Subbituminous Coal Using the Blend of Trimethyl Pentanediol Derivatives and Pico-Nano Bubbles.” 2013. Web. 20 Jan 2021.

Vancouver:

Chen J. Column Flotation of Subbituminous Coal Using the Blend of Trimethyl Pentanediol Derivatives and Pico-Nano Bubbles. [Internet] [Thesis]. West Virginia University; 2013. [cited 2021 Jan 20]. Available from: https://doi.org/10.33915/etd.3384 ; https://researchrepository.wvu.edu/etd/3384.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Chen J. Column Flotation of Subbituminous Coal Using the Blend of Trimethyl Pentanediol Derivatives and Pico-Nano Bubbles. [Thesis]. West Virginia University; 2013. Available from: https://doi.org/10.33915/etd.3384 ; https://researchrepository.wvu.edu/etd/3384

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

University of Zambia

11. Dembetembe, Gift G. Nchanga open pit fleet optimization for productivity improvement .

Degree: 2017, University of Zambia

URL: http://dspace.unza.zm:8080/xmlui/handle/123456789/4684

► Nchanga Open Pit (NOP) is facing a critical equipment planning decision after undertaking improvement projects at the processing plant namely Elevated Temperature Leaching, Heap Leaching… (more)

▼ Nchanga Open Pit (NOP) is facing a critical equipment planning decision after undertaking improvement projects at the processing plant namely Elevated Temperature Leaching, Heap Leaching and Cobalt/Copper separation. Elevated Temperature Leaching has resulted in 20% increase in the recovery of copper while cobalt/copper separation is anticipated to bring 77.5% increase in the value of the final product. The improvements at the processing plant have subsequently led to extension of life of mine to 4 years. As a result of the above, all upstream components of the value chain have to be harmonized with these improvements in order to maintain productivity at optimum level and curb loss of value. Currently, NOP is faced with a critical equipment planning decision where the current ore handling fleet has to be either re-capitalized or apportioned to exploit new mining areas. Therefore this study was undertaken in order to optimize the fleet in terms of both size and performance. In order to achieve the stated objective, production planning, fleet optimization and fleet management were reviewed and analyzed based on generic formulas, match factor theory, Overall Equipment Effectiveness (OEE) and queuing theory while analysis of fleet performance and simulation was done by using Talpac software. Results of study indicated that NOP needs to invest in machinery by either re-capitalizing the current fleet or resorting to a more cost effective fleet management approach. Fleet optimization at NOP had six interacting factors which have attributed to low fleet performance. These factors are low machine availability, low machine utilization, mismatch between loaders and truck fleet sizes, double handling of ore, costly dust suppression system and flawed maintenance system. Furthermore, based on fleet deterioration, assessment of fleet performance using OEE showed low Overall Equipment Effectiveness of 7.2% for shovels, 13.6% for large excavators and 17.6% for trucks against a score of 85%. The study has also established that the number of trucks needs to be increased from 15 to 28 if the current haulage system has to be maintained or alternatively use the conveyor belt system. However, to do this, a reliability and maintainability analysis has to be done which is beyond the scope of this study.

Subjects/Keywords: Mining engineering

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APA (6^th Edition):

Dembetembe, G. G. (2017). Nchanga open pit fleet optimization for productivity improvement . (Thesis). University of Zambia. Retrieved from http://dspace.unza.zm:8080/xmlui/handle/123456789/4684

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Dembetembe, Gift G. “Nchanga open pit fleet optimization for productivity improvement .” 2017. Thesis, University of Zambia. Accessed January 20, 2021. http://dspace.unza.zm:8080/xmlui/handle/123456789/4684.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Dembetembe, Gift G. “Nchanga open pit fleet optimization for productivity improvement .” 2017. Web. 20 Jan 2021.

Vancouver:

Dembetembe GG. Nchanga open pit fleet optimization for productivity improvement . [Internet] [Thesis]. University of Zambia; 2017. [cited 2021 Jan 20]. Available from: http://dspace.unza.zm:8080/xmlui/handle/123456789/4684.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Dembetembe GG. Nchanga open pit fleet optimization for productivity improvement . [Thesis]. University of Zambia; 2017. Available from: http://dspace.unza.zm:8080/xmlui/handle/123456789/4684

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

12. Mutambo, Webby. A geotechnical review and considerations in the design of a new mining method at Konkola Mine.

Degree: 2014, University of Zimbabwe

URL: http://dspace.unza.zm/handle/123456789/3189

► Konkola Mine of Konkola Copper Mines Plc comprises of Number 1 and 3 Shafts located on the northern most part of the Zambian Copperbelt. The… (more)

▼ Konkola Mine of Konkola Copper Mines Plc comprises of Number 1 and 3 Shafts located on the northern most part of the Zambian Copperbelt. The mining licence area is characterised by the Kirilabombwe anticline dividing the West and North Limbs striking generally in the northwest to southeast directions. Average dip angles are 60in the Central region, very flat (about 10) towards the „nose‟ area and 60in the North. The Number 1 Shaft is located in southern part of the ore body and lies between 0mN to 3000mN survey mark positions and extends to 800mS. The current development is below 3150 feet level. The Number 3 Shaft is located on the North Limb and the lowest tramming level is at 1850 feet level. Production is currently below the 2270 feet level.As mining is focused below 2270 feet level at Number 3 Shaft and below 3150 feet at Number 1 Shaft, there is need to determine a suitable mining method. This must take into consideration the geotechnical parameters of the host rock and the ore body especially in the nose area where several mining methods have been applied. The dip and the depth from surface influenced the selection of a suitable mining method.This research involved collection of scan line mapped data. The data collected includes joint spacing, joint orientation, joint condition and rock samples to determine the uni-axial compressive strength. The collection of data at the mine site was done in two parts: the first part involved collection of the existing mapped data while the second part involved underground mapping. The collected data was analysed using a computer based spreadsheet to determine the rock mass rating and the information was subjected to evaluation using specialised geotechnical Phase2D software.A review of the design and implementation of the proposed mining method has been made with the aid of a computer model using Phase2D. Ground support requirements for the mining method have also been defined. This selected mining method has been analysed based on the productivity and safe extraction way of taking out the ore body in the nose area of Konkola. The results show the options that involve mining of primary and secondary stopes with different stope spans and will require cemented backfill in primary stopes.

Subjects/Keywords: Mining Engineering

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APA (6^th Edition):

Mutambo, W. (2014). A geotechnical review and considerations in the design of a new mining method at Konkola Mine. (Thesis). University of Zimbabwe. Retrieved from http://dspace.unza.zm/handle/123456789/3189

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mutambo, Webby. “A geotechnical review and considerations in the design of a new mining method at Konkola Mine.” 2014. Thesis, University of Zimbabwe. Accessed January 20, 2021. http://dspace.unza.zm/handle/123456789/3189.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mutambo, Webby. “A geotechnical review and considerations in the design of a new mining method at Konkola Mine.” 2014. Web. 20 Jan 2021.

Vancouver:

Mutambo W. A geotechnical review and considerations in the design of a new mining method at Konkola Mine. [Internet] [Thesis]. University of Zimbabwe; 2014. [cited 2021 Jan 20]. Available from: http://dspace.unza.zm/handle/123456789/3189.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mutambo W. A geotechnical review and considerations in the design of a new mining method at Konkola Mine. [Thesis]. University of Zimbabwe; 2014. Available from: http://dspace.unza.zm/handle/123456789/3189

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

13. Kangwa, Sam. Economic consequences of hole deviations in mining operations.

Degree: 2011, University of Zimbabwe

URL: http://dspace.unza.zm/handle/123456789/664

► In hard rock mining, drilling and blasting still remain the main method of fragmenting rock. In mining methods involving the use of long holes, extra… (more)

▼ In hard rock mining, drilling and blasting still remain the main method of fragmenting rock. In mining methods involving the use of long holes, extra costs are incurred as a result of consequences associated with hole deviations.The consequences include build-ups, hang-ups and poor rock fragmentation.These consequences usually lead to extra drilling, loss of drill strings, ore dilution, ore loss, increased explosive consumption, time wastage and delays in the chain of production operations, accelerated wear of equipment, extra crushing, extra mineral dressing work, and increased labour costs.Many studies do exist on hole deviations. Whereas sources and effects of the deviations have been investigated, no work has been done on quantification of extra costs due to hole deviations. The objectives, therefore, of this study were to identify consequences associated with hole deviations in mining operations and to quantify the consequences in economic terms. For the study to be meaningful, it was decided to carry out a field investigation at an operating mine. The investigation was carried out at South ore-body shaft of Zambia Consolidated Copper Mines, Nkana Division. Nkana Division operates an underground mine and produces copper and cobalt.The detailed studies of hole deviations and their consequences involved two selected operations, namely stope drilling and raiseboring of Vertical Crater Retreat (VCR) mining method. The studies involved examination of drilling plans, observation of drilling operations, measurement of hole deviations, observation of blasting activities, examination of fragmentation and handling of ore. The studies showed that almost all the holes observed had some degree of deviation. The linear deviation ranged from 0.2m to 12.0m for hole lengths of 30m to 105m. It was subsequently established that there is a strong link between hole deviations and many problems faced in the chain of mining operations.The consequences were identified and correspondingly quantified in economic terms. The cost estimations were done using both rudimental and computer aided calculations. From the estimates, the VCR stope studied accrued approximately US274,000 extra cost, representing 62% of the total operational cost, while the raise pilot hole accrued approximately US6,000 extra cost representing 44% of the total operational cost. These extra costs were as a result of hole deviations.These results clearly show that hole deviations have a significant negative effect on the mining operations and that they lead to poor mining economy.If the quality of production and service holes can be improved, a saving of up to 70% may be achieved in the VCR stope. For an underground mine such as Nkana Division, it may become possible for the mine to compete favourably with other underground and surface mines. For this to be achieved, it is recommended that management should:a) Set up a steering group to look into minimising hole deviations b) Rehabilitate or purchase drilling machines and accessories to improve machine…

Subjects/Keywords: Mining engineering

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Kangwa, S. (2011). Economic consequences of hole deviations in mining operations. (Thesis). University of Zimbabwe. Retrieved from http://dspace.unza.zm/handle/123456789/664

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Kangwa, Sam. “Economic consequences of hole deviations in mining operations.” 2011. Thesis, University of Zimbabwe. Accessed January 20, 2021. http://dspace.unza.zm/handle/123456789/664.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Kangwa, Sam. “Economic consequences of hole deviations in mining operations.” 2011. Web. 20 Jan 2021.

Vancouver:

Kangwa S. Economic consequences of hole deviations in mining operations. [Internet] [Thesis]. University of Zimbabwe; 2011. [cited 2021 Jan 20]. Available from: http://dspace.unza.zm/handle/123456789/664.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Kangwa S. Economic consequences of hole deviations in mining operations. [Thesis]. University of Zimbabwe; 2011. Available from: http://dspace.unza.zm/handle/123456789/664

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Michigan Technological University

14. Smith, Jessica. LARGE SCALE LANDSLIDE ON THE ONTONAGON RIVER, MICHIGAN.

Degree: MS, Department of Geological and Mining Engineering and Sciences, 2012, Michigan Technological University

URL: https://digitalcommons.mtu.edu/etd-restricted/146

► In 2003, a large landslide occurred along the Ontonagon River, located in the Upper Peninsula of Michigan, and adjacent to US-45 in Ontonagon County.… (more)

Subjects/Keywords: Mining Engineering

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APA (6^th Edition):

Smith, J. (2012). LARGE SCALE LANDSLIDE ON THE ONTONAGON RIVER, MICHIGAN. (Masters Thesis). Michigan Technological University. Retrieved from https://digitalcommons.mtu.edu/etd-restricted/146

Chicago Manual of Style (16^th Edition):

Smith, Jessica. “LARGE SCALE LANDSLIDE ON THE ONTONAGON RIVER, MICHIGAN.” 2012. Masters Thesis, Michigan Technological University. Accessed January 20, 2021. https://digitalcommons.mtu.edu/etd-restricted/146.

MLA Handbook (7^th Edition):

Smith, Jessica. “LARGE SCALE LANDSLIDE ON THE ONTONAGON RIVER, MICHIGAN.” 2012. Web. 20 Jan 2021.

Vancouver:

Smith J. LARGE SCALE LANDSLIDE ON THE ONTONAGON RIVER, MICHIGAN. [Internet] [Masters thesis]. Michigan Technological University; 2012. [cited 2021 Jan 20]. Available from: https://digitalcommons.mtu.edu/etd-restricted/146.

Council of Science Editors:

Smith J. LARGE SCALE LANDSLIDE ON THE ONTONAGON RIVER, MICHIGAN. [Masters Thesis]. Michigan Technological University; 2012. Available from: https://digitalcommons.mtu.edu/etd-restricted/146

Queens University

15. Abdeljalil, Muhanad. A Critical Review of the Inputs to Long Range Mine Planning of Open Pit Porphyry Type Copper Deposits .

Degree: Mining Engineering, 2013, Queens University

URL: http://hdl.handle.net/1974/8005

► Long term planning is the process used by a mining organization to develop a strategic business plan. The plan describes how the ore is going… (more)

Subjects/Keywords: Mining Engineering

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APA (6^th Edition):

Abdeljalil, M. (2013). A Critical Review of the Inputs to Long Range Mine Planning of Open Pit Porphyry Type Copper Deposits . (Thesis). Queens University. Retrieved from http://hdl.handle.net/1974/8005

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Abdeljalil, Muhanad. “A Critical Review of the Inputs to Long Range Mine Planning of Open Pit Porphyry Type Copper Deposits .” 2013. Thesis, Queens University. Accessed January 20, 2021. http://hdl.handle.net/1974/8005.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Abdeljalil, Muhanad. “A Critical Review of the Inputs to Long Range Mine Planning of Open Pit Porphyry Type Copper Deposits .” 2013. Web. 20 Jan 2021.

Vancouver:

Abdeljalil M. A Critical Review of the Inputs to Long Range Mine Planning of Open Pit Porphyry Type Copper Deposits . [Internet] [Thesis]. Queens University; 2013. [cited 2021 Jan 20]. Available from: http://hdl.handle.net/1974/8005.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Abdeljalil M. A Critical Review of the Inputs to Long Range Mine Planning of Open Pit Porphyry Type Copper Deposits . [Thesis]. Queens University; 2013. Available from: http://hdl.handle.net/1974/8005

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

McGill University

16. Sari, Yuksel Asli. Mine production scheduling through Heuristic memory based, improved simulated annealing.

Degree: M. Eng., Department of Mining and Materials, 2015, McGill University

URL: https://escholarship.mcgill.ca/downloads/6w924f71j.pdf ; https://escholarship.mcgill.ca/concern/theses/ht24wn345

►

Because of high value added potential, mine production scheduling has been an attractive topic in mining engineering area for 50 years. Mine production scheduling is… (more)

▼

Because of high value added potential, mine production scheduling has been an attractive topic in mining engineering area for 50 years. Mine production scheduling is essentially a set of problems: block sequencing, ore-waste discrimination and production rates. Previously the machine learning technique Simulated Annealing (SA) was usedBecause of high value added potential, mine production scheduling has been an attractive topic in mining engineering area for 50 years. Mine production scheduling is essentially a set of problems: block sequencing, ore-waste discrimination and production rates. Previously the machine learning technique Simulated Annealing (SA) was usedto solve the classic mine production scheduling problem together with Lerchs-Grossman method. We are taking this approach one step forward to solve poly-metallic, multiple process destinations and multiple rock types mine production scheduling problem using the equivalent grade factors. A transportation penalty approach was taken to smooth the fluctuating structure that emerges as a result of SA's nature and to unify the same periods to decrease transportation costs. Moreover, a novel, heuristic memory based SA technique is proposed, where a foreseen variable is nominated to maximize the objective function and this variable's questionable contribution is evaluated by distribution fitting to online gathered data points. If indeed this variable is influencing the objective function, its effect is boosted to also maximize this variable. SA with heuristic based memory converges faster to the solution and produces better results compared to original SA technique within the same frame of time. Success of the approach is demonstrated by two case studies, comparing the revenues of the base case (ranked positional weight algorithm), standard SA and heuristic memory based SA. In all cases, NPV is higher with the heuristic memory based SA.

Raison du fort potentiel, la planification de la mine a été un sujet attrayant dans le secteur du génie minière depuis 50 ans. Planification de la mine est essentiellement un ensemble de problèmes: le séquençage de bloc, la discrimination minerai déchets et les taux de production. Auparavant, la technique d'apprentissage machine Simulated Annealing (SA) a été utilisé pour résoudre le problème classique de la planification de la mine avec la méthode Lerchs-Grossman. Nous prenons cette approche un pas en avant pour résoudre poly-métallique, plusieurs destinations de processus et le problème de types de roches production minière d'ordonnancement multiples en utilisant les facteurs de qualité équivalentes. Une approche de la sanction de transport a été prise pour lisser la structure fluctuante qui émerge à la suite de SA's nature. En outre, une nouvelle technique basée SA mémoire heuristique est proposé, où une variable prévu est nominé pour maximiser la fonction objectif et la contribution douteuse de cette variable est évalué en ajustant à la ligne des points de données recueillies distribution. En effet, si cette variable…

Advisors/Committee Members: Mustafa Kumral (Internal/Supervisor).

Subjects/Keywords: Engineering - Mining

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APA (6^th Edition):

Sari, Y. A. (2015). Mine production scheduling through Heuristic memory based, improved simulated annealing. (Masters Thesis). McGill University. Retrieved from https://escholarship.mcgill.ca/downloads/6w924f71j.pdf ; https://escholarship.mcgill.ca/concern/theses/ht24wn345

Chicago Manual of Style (16^th Edition):

Sari, Yuksel Asli. “Mine production scheduling through Heuristic memory based, improved simulated annealing.” 2015. Masters Thesis, McGill University. Accessed January 20, 2021. https://escholarship.mcgill.ca/downloads/6w924f71j.pdf ; https://escholarship.mcgill.ca/concern/theses/ht24wn345.

MLA Handbook (7^th Edition):

Sari, Yuksel Asli. “Mine production scheduling through Heuristic memory based, improved simulated annealing.” 2015. Web. 20 Jan 2021.

Vancouver:

Sari YA. Mine production scheduling through Heuristic memory based, improved simulated annealing. [Internet] [Masters thesis]. McGill University; 2015. [cited 2021 Jan 20]. Available from: https://escholarship.mcgill.ca/downloads/6w924f71j.pdf ; https://escholarship.mcgill.ca/concern/theses/ht24wn345.

Council of Science Editors:

Sari YA. Mine production scheduling through Heuristic memory based, improved simulated annealing. [Masters Thesis]. McGill University; 2015. Available from: https://escholarship.mcgill.ca/downloads/6w924f71j.pdf ; https://escholarship.mcgill.ca/concern/theses/ht24wn345

McGill University

17. Sell, Maiko. Generating a 3D training image with low-rank tensor completion: a multi-stage application.

Degree: M. Eng., Department of Mining and Materials, 2015, McGill University

URL: https://escholarship.mcgill.ca/downloads/w9505344k.pdf ; https://escholarship.mcgill.ca/concern/theses/rb68xf80f

►

Une image d'entraînement (TI) est un outil fondamental dans le domaine des simulations à points multiples (MPS) et des simulations statistiques spatiales d'ordre élevé (HOS).… (more)

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Une image d'entraînement (TI) est un outil fondamental dans le domaine des simulations à points multiples (MPS) et des simulations statistiques spatiales d'ordre élevé (HOS). Les TI représentent une base de données statistiques et de configurations spatiales. Celles-ci sont requises pour réaliser la construction de distributions conditionnelles utilisées afin de générer un point simulé à chaque nœud sur une grille de simulation. À leur tour, les simulations spatiales créent l'architecture sur laquelle est basée la construction des modèles de caractérisation et de risque concernant les réservoirs de pétrole et les gisements de minerais. Cependant, les méthodes 3D utilisées pour construire des TI, basées d'une part sur des données continues et d'autre part sur des données qui n'ont pas été obtenues par des méthodes d'échantillonnage aléatoire, sont très rares dans la littérature. Les méthodes de reconstruction d'image, telles que la méthode de complétion 2D de matrices à multiples étapes (MSMC), s'appliquent à des échantillons situés de façon aléatoire. Ce mémoire propose une méthode de complétion de tenseurs à multiples étapes (MSTC). Cette méthode permet la reconstruction d'une TI en 3D provenant directement de chaines d'échantillons -situées de façon non-aléatoire - et ne représentant que 2% de toute la TI. La méthode MSTC reconstruit des TI de la même résolution que celle des données originales en utilisant un algorithme de complétion de tenseur nommé LRTC. La fiabilité de la méthode MSTC est d'abord testée à partir de deux TI provenant d'un réservoir de pétrole artificiel (composé de grès et d'argile). Cette méthode a également été appliquée à un gisement de minerais réel. En raison de clauses de confidentialité, seul les résultats obtenus à partir de l'ensemble des données artificielles seront présentés dans le cadre de ce mémoire. Dans tous les cas testés, la méthode MSTC est capable de reconstruire les statistiques provenant d'échantillons. Quant aux cas composés d'un faible nombre d'échantillons de haute teneur, les proportions de ces échantillons ne semblent être reconstruites aussi efficacement lorsqu'on les compare avec les résultats obtenus avec les cas de références. Les résultats de cette analyse démontrent que d'une part, la méthode MSTC génère des TIs de données continues qui sont visuellement acceptables, et d'autre part, cette méthode est capable de reconstruire les statistiques d'ordre élevé, jusqu'au 4ième ordre. Les résultats de ce mémoire contribuent au développement des algorithmes de simulations MPS et HOS qui permettent tous deux de reconstruire des configurations spatiales complexes (non-linéaires) avec des données continues échantillonnées de façon non-aléatoire, tout en utilisant des motifs de forage spécifiques.

A training image (TI) is an important tool in the context of multiple-point (MPS) and high-order (HOS) statistic spatial simulations. TIs represent the repository of patterns and spatial statistics required for drawing values at each grid node in a multiple-point spatial…

Advisors/Committee Members: In-Ho Jung (Internal/Supervisor).

Subjects/Keywords: Engineering - Mining

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Sell, M. (2015). Generating a 3D training image with low-rank tensor completion: a multi-stage application. (Masters Thesis). McGill University. Retrieved from https://escholarship.mcgill.ca/downloads/w9505344k.pdf ; https://escholarship.mcgill.ca/concern/theses/rb68xf80f

Chicago Manual of Style (16^th Edition):

Sell, Maiko. “Generating a 3D training image with low-rank tensor completion: a multi-stage application.” 2015. Masters Thesis, McGill University. Accessed January 20, 2021. https://escholarship.mcgill.ca/downloads/w9505344k.pdf ; https://escholarship.mcgill.ca/concern/theses/rb68xf80f.

MLA Handbook (7^th Edition):

Sell, Maiko. “Generating a 3D training image with low-rank tensor completion: a multi-stage application.” 2015. Web. 20 Jan 2021.

Vancouver:

Sell M. Generating a 3D training image with low-rank tensor completion: a multi-stage application. [Internet] [Masters thesis]. McGill University; 2015. [cited 2021 Jan 20]. Available from: https://escholarship.mcgill.ca/downloads/w9505344k.pdf ; https://escholarship.mcgill.ca/concern/theses/rb68xf80f.

Council of Science Editors:

Sell M. Generating a 3D training image with low-rank tensor completion: a multi-stage application. [Masters Thesis]. McGill University; 2015. Available from: https://escholarship.mcgill.ca/downloads/w9505344k.pdf ; https://escholarship.mcgill.ca/concern/theses/rb68xf80f

McGill University

18. Jin, Lei. The impact of water on heat distribution and mechanical properties of basalt after microwave treatment.

Degree: M. Eng., Department of Mining and Materials, 2015, McGill University

URL: https://escholarship.mcgill.ca/downloads/8w32r8488.pdf ; https://escholarship.mcgill.ca/concern/theses/9g54xm648

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Every underground excavation technique has shortcomings (e.g., low productivity, high cost). Heating rocks with microwave energy before excavation can change their mechanical properties and reduce… (more)

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Every underground excavation technique has shortcomings (e.g., low productivity, high cost). Heating rocks with microwave energy before excavation can change their mechanical properties and reduce rock strength. Microwave-assisted rock fragmentation not only reduces equipment maintenance costs, but increases drilling penetration rates and productivity. Mineral processing can also benefit from the micro-fractures created by this promising novel technique. The effect of the presence of water during rock microwave heating of rocks is poorly understood and serves as the objective of this thesis. Temperature distributions and mechanical properties (abrasiveness and tensile strength) were measured in stacked basalt disks in saturated and dry conditions after microwave treatment at 2.45 GHz and 3 kW power for three exposure times (40, 60, and 80 s). Water did not affect heat distributions and mechanical properties of basalt after microwave heating. To test if this effect was due to the low porosity of basalt, a more porous sandstone was tested. Saturated specimens burst into fragments during microwave treatment. In addition, a sinusoidal temperature distribution pattern was observed if the basalt specimen size was similar to or larger than the microwave wavelength. Longer exposure times resulted in higher temperatures and larger basalt volumes exhibited a slower heating rate.Measured and simulated—using the finite element modelling package COMSOL Multiphysics®—heat distribution patterns were similar, though simulated temperatures were lower. Similar to experimental results, simulated dry and wet basalt temperatures did not differ after microwave heating. The reliability of this pilot numerical modeling study will facilitate future simulations of processes that are too complex to empirically measure.

Chaque méthode d'excavation a ses lacunes, tel qu'un manque de productivité ou un manque de compétitivité d'un point de vue économique. Chauffer la roche avec de l'énergie micro-onde est une technique prometteuse qui peut changer les propriétés mécaniques de la roche et réduire sa force. La fragmentation de roche assistée par micro-ondes réduit non seulement l'usure de l'équipement, mais augmente aussi la productivité et le taux de forage. Le traitement de minerais peut aussi bénéficier des micro-fractures créées par les micro-ondes. Par contre, le rôle de l'eau dans le réchauffement de la roche par micro-ondes n'est pas établi et est le sujet de cette thèse. La répartition de température et les propriétés mécaniques (index d'abrasivité CERCHAR, résistance à la traction) de piles de disques de basalte secs et saturés sont étudiées. Les piles de disques sont exposées aux micro-ondes ayant une fréquence de 2.45 GHz et une puissance de 3 kW pendant 40, 60, ou 80 seconds. Il est démontré que l'eau n'a pas d'impact sur les propriétés mécaniques et la répartition de température dans les disques de basalte après chauffage par micro-ondes. Par contre, l'effet de l'eau sur le chauffage par micro-ondes d'une roche plus poreuse (le…

Advisors/Committee Members: Faramarz P Hassani (Internal/Supervisor).

Subjects/Keywords: Engineering - Mining

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Jin, L. (2015). The impact of water on heat distribution and mechanical properties of basalt after microwave treatment. (Masters Thesis). McGill University. Retrieved from https://escholarship.mcgill.ca/downloads/8w32r8488.pdf ; https://escholarship.mcgill.ca/concern/theses/9g54xm648

Chicago Manual of Style (16^th Edition):

Jin, Lei. “The impact of water on heat distribution and mechanical properties of basalt after microwave treatment.” 2015. Masters Thesis, McGill University. Accessed January 20, 2021. https://escholarship.mcgill.ca/downloads/8w32r8488.pdf ; https://escholarship.mcgill.ca/concern/theses/9g54xm648.

MLA Handbook (7^th Edition):

Jin, Lei. “The impact of water on heat distribution and mechanical properties of basalt after microwave treatment.” 2015. Web. 20 Jan 2021.

Vancouver:

Jin L. The impact of water on heat distribution and mechanical properties of basalt after microwave treatment. [Internet] [Masters thesis]. McGill University; 2015. [cited 2021 Jan 20]. Available from: https://escholarship.mcgill.ca/downloads/8w32r8488.pdf ; https://escholarship.mcgill.ca/concern/theses/9g54xm648.

Council of Science Editors:

Jin L. The impact of water on heat distribution and mechanical properties of basalt after microwave treatment. [Masters Thesis]. McGill University; 2015. Available from: https://escholarship.mcgill.ca/downloads/8w32r8488.pdf ; https://escholarship.mcgill.ca/concern/theses/9g54xm648

McGill University

19. Spleit, Michael. Stochastic long-term production scheduling of the LabMag iron ore deposit in Labrador, Canada.

Degree: M. Eng., Department of Mining and Materials, 2015, McGill University

URL: https://escholarship.mcgill.ca/downloads/6682x6823.pdf ; https://escholarship.mcgill.ca/concern/theses/3197xp73c

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In long-term production scheduling, which is of vital importance to a project's success and profitability, the goal is to determine a feasible extraction sequence that… (more)

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In long-term production scheduling, which is of vital importance to a project's success and profitability, the goal is to determine a feasible extraction sequence that maximizes the discounted cash flows of a mine while also ensuring the target ore quantities and qualities are met. There is risk of the actual production deviating from what is planned due to geological variability, which is not considered by conventional mine designs and production schedules that are based on a single estimated ore body model. In order to address this issue, multiple simulations of an orebody can be created to represent its geological variability and allow for quantifying expected bounds, instead of single estimates, for grades, tonnages, and financial results. Beyond simply quantifying the geological uncertainty, a mine production schedule can be optimized while directly considering simulations in order to manage the geological risk.In this study, a set of geological simulations of the LabMag iron ore deposit in Labrador, Canada is generated in order to quantify the geological variability in an existing mining schedule and assess the schedule's performance. The ‘DBMAFSIM' algorithm is used to provide joint geostatistical simulation of spatially correlated variables of interest. First, a novel application of the method is used to jointly simulate the thicknesses of seven lithological layers, and then four correlated grades within each lithology are jointly simulated. The variability in an existing production schedule, designed based on a single deterministic geological model, is then evaluated using the simulations. This evaluation quantifies the potential deviations from expected production target grades and tonnages as well as the associated financial impact of these deviations. Subsequently, a production schedule optimization based on stochastic integer programming (SIP) is presented that aims to improve mine profitability while simultaneously managing the risk of production tonnage and quality deviations. In addition, the formulation has components for equipment and waste material management: the truck fleet requirements are minimized while ensuring that the number of required trucks is an increasing function to avoid unnecessary peaks; and the evolution of the pit is controlled so that space within the mined out pit is continuously provided to allow for tailings and waste rock to be replaced, thus minimizing the project's environmental footprint.

L'établissement du calendrier de production minière à long terme est d'importance vitale pour le succès et la rentabilité d'un projet. Son but est de déterminer une séquence d'extraction réalisable qui maximise les flux de trésorerie actualisés d'une mine tout en assurant les quantités et qualités visées de minerai. La production réelle risque de s'écarter des prévisions à cause de la variabilité géologique, qui n'est considérée ni dans les conceptions de mine ni dans les calendriers de production conventionnels car ils sont basés sur un modèle d'évaluation unique du corps minéralisé.…

Advisors/Committee Members: Roussos G Dimitrakopoulos (Internal/Supervisor).

Subjects/Keywords: Engineering - Mining

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Spleit, M. (2015). Stochastic long-term production scheduling of the LabMag iron ore deposit in Labrador, Canada. (Masters Thesis). McGill University. Retrieved from https://escholarship.mcgill.ca/downloads/6682x6823.pdf ; https://escholarship.mcgill.ca/concern/theses/3197xp73c

Chicago Manual of Style (16^th Edition):

Spleit, Michael. “Stochastic long-term production scheduling of the LabMag iron ore deposit in Labrador, Canada.” 2015. Masters Thesis, McGill University. Accessed January 20, 2021. https://escholarship.mcgill.ca/downloads/6682x6823.pdf ; https://escholarship.mcgill.ca/concern/theses/3197xp73c.

MLA Handbook (7^th Edition):

Spleit, Michael. “Stochastic long-term production scheduling of the LabMag iron ore deposit in Labrador, Canada.” 2015. Web. 20 Jan 2021.

Vancouver:

Spleit M. Stochastic long-term production scheduling of the LabMag iron ore deposit in Labrador, Canada. [Internet] [Masters thesis]. McGill University; 2015. [cited 2021 Jan 20]. Available from: https://escholarship.mcgill.ca/downloads/6682x6823.pdf ; https://escholarship.mcgill.ca/concern/theses/3197xp73c.

Council of Science Editors:

Spleit M. Stochastic long-term production scheduling of the LabMag iron ore deposit in Labrador, Canada. [Masters Thesis]. McGill University; 2015. Available from: https://escholarship.mcgill.ca/downloads/6682x6823.pdf ; https://escholarship.mcgill.ca/concern/theses/3197xp73c

McGill University

20. Liu, Fan. Exploration of microwave-assisted breakage of rocks: The effect of size, shape, and internal discontinuity of rock on microwave distribution.

Degree: M. Eng., Department of Mining and Materials, 2015, McGill University

URL: https://escholarship.mcgill.ca/downloads/d791sk22g.pdf ; https://escholarship.mcgill.ca/concern/theses/5425kd720

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Au micro-ondes rupture assisté de roches se est avérée plus efficace que les méthodes traditionnelles de séparation des minéraux précieux de gangue minérale pendant le… (more)

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Au micro-ondes rupture assisté de roches se est avérée plus efficace que les méthodes traditionnelles de séparation des minéraux précieux de gangue minérale pendant le traitement. Cependant, peu de recherches ont été menées en termes de demandes de roche rupture assistée par micro-ondes à creusement de tunnels. La combinaison d'un système de micro-ondes et Boring Machine Tunnel (TBM) a le potentiel d'être un outil d'excavation du tunnel efficace qui est adapté à l'exploitation dans les deux conditions dures et douces rock. Comme une petite composante d'un projet plus vaste, concernant les tunneliers assistée par micro-ondes, l'objectif de cette thèse est de démontrer expérimentalement internes propriétés de distribution de la température des roches de basalte ayant différentes tailles, formes, et l'espacement interne. De plus, les corrélations sont quantifiés parmi absorption de micro-ondes, le volume et la température de l'échantillon après le traitement aux micro-ondes dans une cavité multimode.Principale conclusion sont:1. Lorsque le rapport diamètre sur hauteur d'un noyau cylindrique est supérieur à 1, un seul pic de température apparaît quelque part au milieu du noyau. Lorsque le rapport est inférieur à 1, deux pics de température apparaissent à proximité des extrémités du noyau, et le rapport diamètre sur hauteur qui peuvent se traduire par deux pics de température augmente lorsque le diamètre du noyau augmente;2. La forme n'a aucune influence évidente sur la distribution de la température;3. espacement interne de 1 mm ne influence pas la distribution de la température lorsque le noyau est complètement exposé à un rayonnement de micro-ondes. L'espacement interne de plus de 1 mm permet de réduire considérablement l'efficacité du chauffage lorsque seulement une surface du noyau est exposée à un rayonnement micro-onde plan;4. Les augmentations d'absorption d'énergie électromagnétique et la température moyenne diminue avec l'augmentation du volume de l'échantillon. Les tendances sont bien décrites par la série de puissance.

Microwave- assisted breakage of rocks has proved to be more efficient than traditional methods at separating valuable minerals from gangue during mineral processing. However, little research has been conducted in terms of the applications of microwave-assisted rock breakage to tunnel excavation. The combination of a microwave system and Tunnel Boring Machine (TBM) has the potential to be an efficient tunnel excavation tool that is suitable in operating in both hard and soft rock conditions. As a small component of a larger project related to the microwave-assisted TBMs, the purpose of this thesis is to experimentally demonstrate internal temperature distribution properties for basalt rocks having different sizes, shapes, and internal spacing. In addition, correlations are quantified among microwave absorption, volume, and sample temperature after microwave treatment in a multimode cavity. Key finding are: 1.When the diameter to height ratio of a cylindrical core is more than 1, only one peak…

Advisors/Committee Members: Faramarz P Hassani (Internal/Supervisor).

Subjects/Keywords: Engineering - Mining

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Liu, F. (2015). Exploration of microwave-assisted breakage of rocks: The effect of size, shape, and internal discontinuity of rock on microwave distribution. (Masters Thesis). McGill University. Retrieved from https://escholarship.mcgill.ca/downloads/d791sk22g.pdf ; https://escholarship.mcgill.ca/concern/theses/5425kd720

Chicago Manual of Style (16^th Edition):

Liu, Fan. “Exploration of microwave-assisted breakage of rocks: The effect of size, shape, and internal discontinuity of rock on microwave distribution.” 2015. Masters Thesis, McGill University. Accessed January 20, 2021. https://escholarship.mcgill.ca/downloads/d791sk22g.pdf ; https://escholarship.mcgill.ca/concern/theses/5425kd720.

MLA Handbook (7^th Edition):

Liu, Fan. “Exploration of microwave-assisted breakage of rocks: The effect of size, shape, and internal discontinuity of rock on microwave distribution.” 2015. Web. 20 Jan 2021.

Vancouver:

Liu F. Exploration of microwave-assisted breakage of rocks: The effect of size, shape, and internal discontinuity of rock on microwave distribution. [Internet] [Masters thesis]. McGill University; 2015. [cited 2021 Jan 20]. Available from: https://escholarship.mcgill.ca/downloads/d791sk22g.pdf ; https://escholarship.mcgill.ca/concern/theses/5425kd720.

Council of Science Editors:

Liu F. Exploration of microwave-assisted breakage of rocks: The effect of size, shape, and internal discontinuity of rock on microwave distribution. [Masters Thesis]. McGill University; 2015. Available from: https://escholarship.mcgill.ca/downloads/d791sk22g.pdf ; https://escholarship.mcgill.ca/concern/theses/5425kd720

McGill University

21. Nogueira Teixeira, Murilo. Application of multiple-point simulation of mineral deposits based on discrete wavelet transform.

Degree: M. Eng., Department of Mining and Materials, 2015, McGill University

URL: https://escholarship.mcgill.ca/downloads/f4752k884.pdf ; https://escholarship.mcgill.ca/concern/theses/jd473044b

► Traditionnellement, les simulations géostatistiques des gisements minéraux sont effectuées en utilisant des méthodes fondées sur les statistiques spatiales utilisant deux points, comme les variogrammes par… (more)

▼ Traditionnellement, les simulations géostatistiques des gisements minéraux sont effectuées en utilisant des méthodes fondées sur les statistiques spatiales utilisant deux points, comme les variogrammes par exemple. Toutefois, les statistiques spatiales du second ordre ne sont pas suffisantes pour capturer les caractéristiques essentielles et communes des gisements minéraux telles que la connectivité des valeurs extrêmes et les motifs curvilignes, caractéristiques qui ont un impact sur la planification des opérations et de la production de la mine. Pour pallier à ces importantes limitations, les méthodes de simulation à points multiples ont été développées.Ce mémoire décrit d'une façon détaillée une méthode de simulation à points multiples basée sur l'analyse par ondelettes et la reconnaissance des formes. L'idée à la base de l'analyse par ondelettes lorsqu'appliquée à la compression de l'image est de décomposer l'image selon : 1) la quantité d'information moyenne des pixels voisins, dite sous-bande approximative de l'image (approximate sub-band of the image); et 2) l'écart entre les pixels et la moyenne locale. Souvent, dans plusieurs applications, la sous-bande de l'image constitue une représentation suffisante de l'image et peut substituer l'image entière. La méthode de simulation utilisée dans ce mémoire se résume comme suit: d'abord, l'image de formation (training image) est scannée pour générer la configuration de la base de données. Ensuite, la dimension de cette base de données est réduite en appliquant une transformée en ondelettes discrète ce qui permet d'obtenir la sous-bande approximative de l'image des modèles. Par la suite, les modèles sont partitionnés en classes en utilisant l'algorithme des k-moyennes tout en tenant compte de la sous-bande approximative de l'image. Finalement, la grille est simulée en comparant les données conditionnelles en chaque nœud aux prototypes de la classe et en choisissant un modèle de cette classe. Les contributions ainsi que les complexités pratiques inhérentes à cette approche ont été testées et analysées à travers une application à la mine de cuivre Olympic Dam, située au sud de l'Australie et considérée comme étant le quatrième plus grand producteur de cuivre dans le monde. Aussi bien les types de matériaux que les teneurs en cuivre ont été simulés dans cette étude de cas. L'image de formation catégorique (categorical training image) a été générée via l'interprétation géologique, alors que l'image de formation continue (continuous training image) a été générée à l'aide des techniques de «low-rank tensor completion».Les résultats de simulation de la mine Olympic Dam montrent que la méthode utilisée dans ce mémoire peut être appliquée avec succès à des gisements relativement complexes et de grande taille. De plus, les résultats suggèrent qu'il faut générer avec soin l'image de formation (training image) vu son importance dans le processus de simulation. Les réalisations simulées ont été analysées et validées en termes d'histogrammes, variogrammes, et statistiques d'ordre… Advisors/Committee Members: Roussos G Dimitrakopoulos (Internal/Supervisor).

Subjects/Keywords: Engineering - Mining

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Nogueira Teixeira, M. (2015). Application of multiple-point simulation of mineral deposits based on discrete wavelet transform. (Masters Thesis). McGill University. Retrieved from https://escholarship.mcgill.ca/downloads/f4752k884.pdf ; https://escholarship.mcgill.ca/concern/theses/jd473044b

Chicago Manual of Style (16^th Edition):

Nogueira Teixeira, Murilo. “Application of multiple-point simulation of mineral deposits based on discrete wavelet transform.” 2015. Masters Thesis, McGill University. Accessed January 20, 2021. https://escholarship.mcgill.ca/downloads/f4752k884.pdf ; https://escholarship.mcgill.ca/concern/theses/jd473044b.

MLA Handbook (7^th Edition):

Nogueira Teixeira, Murilo. “Application of multiple-point simulation of mineral deposits based on discrete wavelet transform.” 2015. Web. 20 Jan 2021.

Vancouver:

Nogueira Teixeira M. Application of multiple-point simulation of mineral deposits based on discrete wavelet transform. [Internet] [Masters thesis]. McGill University; 2015. [cited 2021 Jan 20]. Available from: https://escholarship.mcgill.ca/downloads/f4752k884.pdf ; https://escholarship.mcgill.ca/concern/theses/jd473044b.

Council of Science Editors:

Nogueira Teixeira M. Application of multiple-point simulation of mineral deposits based on discrete wavelet transform. [Masters Thesis]. McGill University; 2015. Available from: https://escholarship.mcgill.ca/downloads/f4752k884.pdf ; https://escholarship.mcgill.ca/concern/theses/jd473044b

McGill University

22. De Freitas Silva, Mario. Application of efficient frameworks for joint simulation of multi-element mineral deposits and stochastic optimization of open pit mine production scheduling.

Degree: M. Eng., Department of Mining and Materials, 2014, McGill University

URL: https://escholarship.mcgill.ca/downloads/cr56n401m.pdf ; https://escholarship.mcgill.ca/concern/theses/rv042x02h

► Le problème d'optimisation de la production des mines à ciel ouvert (POPM) est un problème complexe en raison de sa taille et de l'incertitude associée… (more)

▼ Le problème d'optimisation de la production des mines à ciel ouvert (POPM) est un problème complexe en raison de sa taille et de l'incertitude associée à ses paramètres clés. Au cours de la dernière décennie, des efforts considérables ont été déployés pour élaborer des nouveaux cadres stochastiques intégrant l'incertitude dans le processus de décision. Toutefois, en raison de la complexité intrinsèque de la formulation mathématique du problème et de la grande taille des dépôts minéraux, trouver une solution exacte pour le POPM est probablement impensable vu temps de calcul induit. De plus, la modélisation de l'incertitude spatiale commune de gisements minéraux tenant compte de plusieurs attributs géologiques corrélés augmente de manière significative la complexité de ces cadres stochastiques. Ces observations motivent le développement de nouvelles approches efficaces pour générer des simulations stochastiques communes d'un dépôt et pour résoudre le POPM sous incertitude géologique. Cette thèse considère ces deux aspects dans ses deux parties principales.Dans la première partie de cette thèse, une approche de résolution heuristique efficace est appliquée et testée pour la planification stochastique de le production d'une mine d'or relativement grande contenant environ 120 000 blocs et considérant un ensemble de quinze scénarios géologiques générés de façon stochastique. La formulation de programmation stochastique en nombres entiers tient compte de plusieurs installations de traitement et d'une «réserve» qui ajoute de la souplesse à l'opération en avançant le traitement des blocs ayant une grande teneur en minerai. L'approche de résolution testée génère d'abord une solution initiale réalisable en résolvant successivement des sous-problèmes du POPM stochastique, où chaque sous-problème est associé à une période. Par la suite, un algorithme de flot dans les réseaux est utilisé séquentiellement pour obtenir des améliorations supplémentaires. Dans le réseau associé au problème de flot, les nœuds représentent les blocs candidats qui pourraient voir leur extraction retardée ou avancée pour générer un nouveau calendrier de production de valeur plus élevée et présente un risque moindre. L'approche de résolution décrite ci-dessus a été testée dans un environnement minier réel et les résultats montrent que des calendriers de production proches des prévisions peuvent être générés en un temps de calcul raisonnable.Dans la deuxième partie de la thèse, l'efficacité d'un cadre de simulation est démontrée à travers une application au cas du dépôt minéral Puma de Vale, une importante latérite de nickel située au Brésil. Pour intégrer la variabilité des profils révoltants, leurs épaisseurs «réelles» sont simulées conjointement en utilisant le facteur d'auto-corrélation min /max (MAF). Les réalisations servent de limites géologiques dans lesquelles Ni, Co, Fe, SiO2, MgO et le facteur de tonnage (DTF) peuvent être conjointement simulés directement à l'échelle du bloc. Le résultat final est un ensemble de représentations équiprobables du… Advisors/Committee Members: Roussos G Dimitrakopoulos (Internal/Supervisor).

Subjects/Keywords: Engineering - Mining

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APA (6^th Edition):

De Freitas Silva, M. (2014). Application of efficient frameworks for joint simulation of multi-element mineral deposits and stochastic optimization of open pit mine production scheduling. (Masters Thesis). McGill University. Retrieved from https://escholarship.mcgill.ca/downloads/cr56n401m.pdf ; https://escholarship.mcgill.ca/concern/theses/rv042x02h

Chicago Manual of Style (16^th Edition):

De Freitas Silva, Mario. “Application of efficient frameworks for joint simulation of multi-element mineral deposits and stochastic optimization of open pit mine production scheduling.” 2014. Masters Thesis, McGill University. Accessed January 20, 2021. https://escholarship.mcgill.ca/downloads/cr56n401m.pdf ; https://escholarship.mcgill.ca/concern/theses/rv042x02h.

MLA Handbook (7^th Edition):

De Freitas Silva, Mario. “Application of efficient frameworks for joint simulation of multi-element mineral deposits and stochastic optimization of open pit mine production scheduling.” 2014. Web. 20 Jan 2021.

Vancouver:

De Freitas Silva M. Application of efficient frameworks for joint simulation of multi-element mineral deposits and stochastic optimization of open pit mine production scheduling. [Internet] [Masters thesis]. McGill University; 2014. [cited 2021 Jan 20]. Available from: https://escholarship.mcgill.ca/downloads/cr56n401m.pdf ; https://escholarship.mcgill.ca/concern/theses/rv042x02h.

Council of Science Editors:

De Freitas Silva M. Application of efficient frameworks for joint simulation of multi-element mineral deposits and stochastic optimization of open pit mine production scheduling. [Masters Thesis]. McGill University; 2014. Available from: https://escholarship.mcgill.ca/downloads/cr56n401m.pdf ; https://escholarship.mcgill.ca/concern/theses/rv042x02h

23. Greth, August V. Evaluating Mine Cooling Systems and Mine Ventilation Strategies to be Applied in Deep and Hot US Mines.

Degree: 2018, University of Nevada, Reno

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10817148

► Metal production in the United States contributes significantly to the national and global economies due to resource demands. As mineral reserves are becoming scarce,… (more)

▼ Metal production in the United States contributes significantly to the national and global economies due to resource demands. As mineral reserves are becoming scarce, demand has driven mining companies to operate at increasing depths underground. Along with this, production has continued to increase year after year, as lower grade ores are excavated economically. However, the increased mining depths and increased production have resulted in enlarged heat loads in the underground mine environment. Increased heat loads can result in temperatures, which are too high for mine workers to safely work. This may cause heat related illness, injuries or even death. Mine operators must pursue heat reduction strategies in order to maintain safe temperatures to protect mine workers. There are a number of heat mitigation methods and strategies which mine operators can implement. The most common means is through the use of ventilation to provide cool air volumes to reduce the heat load and dilute the contaminants generated in the production workings below their threshold limit values (TLV). This can be done by increasing the fresh air volumes through surface accesses such as shafts, raises, adits, ramps, or other mine entrances. When ventilation alone cannot provide acceptable climatic conditions in the production workings and throughout the mine, artificial cooling methods need to be used. These methods can be very effective, however, they require large capital investments, continuous maintenance, and additional operating costs. This includes central cooling, spot cooling, and micro-climate cooling systems. Though reducing the heat load is effective, another strategy is to reduce the source of the heat generation. One such source is the heat generated by diesel engine equipment fleet. This can be decreased by switching to a battery/electric engine equipment fleet. All of these strategies can be compared based off their heat reduction, temperatures, and operating costs. This study does exactly this by using an underground metal mine’s ventilation system to compare various scenarios, and identify the most effective cooling method or system that can be used in deep and hot US mines.

Subjects/Keywords: Engineering; Mining engineering

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APA (6^th Edition):

Greth, A. V. (2018). Evaluating Mine Cooling Systems and Mine Ventilation Strategies to be Applied in Deep and Hot US Mines. (Thesis). University of Nevada, Reno. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10817148

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Greth, August V. “Evaluating Mine Cooling Systems and Mine Ventilation Strategies to be Applied in Deep and Hot US Mines.” 2018. Thesis, University of Nevada, Reno. Accessed January 20, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=10817148.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Greth, August V. “Evaluating Mine Cooling Systems and Mine Ventilation Strategies to be Applied in Deep and Hot US Mines.” 2018. Web. 20 Jan 2021.

Vancouver:

Greth AV. Evaluating Mine Cooling Systems and Mine Ventilation Strategies to be Applied in Deep and Hot US Mines. [Internet] [Thesis]. University of Nevada, Reno; 2018. [cited 2021 Jan 20]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10817148.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Greth AV. Evaluating Mine Cooling Systems and Mine Ventilation Strategies to be Applied in Deep and Hot US Mines. [Thesis]. University of Nevada, Reno; 2018. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10817148

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Michigan Technological University

24. Van Arsdale, Christopher Dawson. Selecting an electrical power source at the scoping level for a mining project.

Degree: MS, Department of Geological and Mining Engineering and Sciences, 2012, Michigan Technological University

URL: https://digitalcommons.mtu.edu/etds/542

► The electrical power source is a critical component of the scoping level study as the source affects both the project economics and timeline. This… (more)

Subjects/Keywords: Engineering; Mining Engineering

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APA (6^th Edition):

Van Arsdale, C. D. (2012). Selecting an electrical power source at the scoping level for a mining project. (Masters Thesis). Michigan Technological University. Retrieved from https://digitalcommons.mtu.edu/etds/542

Chicago Manual of Style (16^th Edition):

Van Arsdale, Christopher Dawson. “Selecting an electrical power source at the scoping level for a mining project.” 2012. Masters Thesis, Michigan Technological University. Accessed January 20, 2021. https://digitalcommons.mtu.edu/etds/542.

MLA Handbook (7^th Edition):

Van Arsdale, Christopher Dawson. “Selecting an electrical power source at the scoping level for a mining project.” 2012. Web. 20 Jan 2021.

Vancouver:

Van Arsdale CD. Selecting an electrical power source at the scoping level for a mining project. [Internet] [Masters thesis]. Michigan Technological University; 2012. [cited 2021 Jan 20]. Available from: https://digitalcommons.mtu.edu/etds/542.

Council of Science Editors:

Van Arsdale CD. Selecting an electrical power source at the scoping level for a mining project. [Masters Thesis]. Michigan Technological University; 2012. Available from: https://digitalcommons.mtu.edu/etds/542

The University of Utah

25. Mitchell, Trent Russell. Normalization of Deviance in Mining Engineering.

Degree: 2017, The University of Utah

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10603711

► Normalization of deviance has been thoroughly studied and proven to have a dramatic impact on the medical industry, particularly in the field of anesthesiology,… (more)

Subjects/Keywords: Ethics; Mining engineering

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APA (6^th Edition):

Mitchell, T. R. (2017). Normalization of Deviance in Mining Engineering. (Thesis). The University of Utah. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10603711

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Mitchell, Trent Russell. “Normalization of Deviance in Mining Engineering.” 2017. Thesis, The University of Utah. Accessed January 20, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=10603711.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Mitchell, Trent Russell. “Normalization of Deviance in Mining Engineering.” 2017. Web. 20 Jan 2021.

Vancouver:

Mitchell TR. Normalization of Deviance in Mining Engineering. [Internet] [Thesis]. The University of Utah; 2017. [cited 2021 Jan 20]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10603711.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Mitchell TR. Normalization of Deviance in Mining Engineering. [Thesis]. The University of Utah; 2017. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10603711

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

26. Claypoole, Micah N. Mineral Ridge| A Late Cretaceous Orogenic Gold System in the Miocene Silver Peak-Lone Mountain Metamorphic Core Complex.

Degree: 2018, University of Nevada, Reno

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=10821834

► Gold deposits in rocks of the Silver Peak metamorphic core complex in west-central Nevada are contained in highly deformed, sheeted milky quartz veins that… (more)

▼ Gold deposits in rocks of the Silver Peak metamorphic core complex in west-central Nevada are contained in highly deformed, sheeted milky quartz veins that cut Neoproterozoic metasedimentary rocks and Cretaceous peraluminous granite and migmatite. Gold production at Mineral Ridge since discovery in 1864 has been approximately 1 million oz. Gold-bearing veins are concentrated in a major low-angle ductile shear system active during the Late Cretaceous. However, a broadly coincident brittle detachment cuts the ductile shear, separating metasedimentary and foliated granitic rocks from overlying non-metamorphosed Cambrian carbonates and Cenozoic volcanics. The Mineral Ridge biotite-muscovite granite pluton bounds the ductile shear along its roof, defining a wedge of prospective metamorphic rocks generally <50-m-thick. Zones of intense shearing generally correspond to highest vein density and therefore, gold grades, and such zones are overprinted with strong but narrowly defined quartz-sericite-pyrite-carbonate alteration. Vein boudins are subparallel to the strong planar to anastomosing shear fabric best developed over 1-10 meter thicknesses at contacts between muscovite schist and/or marble, and foliated granite. Goldbearing veins contain Au:Ag of ≥4, zoned base metals, low As, Sb, and Hg, but high Bi, the latter correlating with gold. Vein-bearing granites at Mineral Ridge yield U/Pb zircon ages of 91.7+/-0.3 Ma and 89.9+/-0.5 Ma and likely derive from crustal melts during peak metamorphism. Hydrothermal monazite in goldbearing quartz veins yielded a U/Pb age of 76.0+/-1.8 Ma, indicating veins are unrelated to granites and formed during retrograde greenschist conditions. Previous cooling ages on mica in granites of ∼42 and 53 Ma further define the cooling path to ∼300°C. Mineral Ridge is interpreted as an orogenic gold system associated with a brittle-ductile shear that formed at depths as much as 11-20 km during the waning stages of Late Cretaceous Sevier contraction. Major exhumation occurred in the late Miocene in association with detachment and transtension in the Walker Lane deformation belt.

Subjects/Keywords: Geology; Mining engineering

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APA (6^th Edition):

Claypoole, M. N. (2018). Mineral Ridge| A Late Cretaceous Orogenic Gold System in the Miocene Silver Peak-Lone Mountain Metamorphic Core Complex. (Thesis). University of Nevada, Reno. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=10821834

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Claypoole, Micah N. “Mineral Ridge| A Late Cretaceous Orogenic Gold System in the Miocene Silver Peak-Lone Mountain Metamorphic Core Complex.” 2018. Thesis, University of Nevada, Reno. Accessed January 20, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=10821834.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Claypoole, Micah N. “Mineral Ridge| A Late Cretaceous Orogenic Gold System in the Miocene Silver Peak-Lone Mountain Metamorphic Core Complex.” 2018. Web. 20 Jan 2021.

Vancouver:

Claypoole MN. Mineral Ridge| A Late Cretaceous Orogenic Gold System in the Miocene Silver Peak-Lone Mountain Metamorphic Core Complex. [Internet] [Thesis]. University of Nevada, Reno; 2018. [cited 2021 Jan 20]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10821834.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Claypoole MN. Mineral Ridge| A Late Cretaceous Orogenic Gold System in the Miocene Silver Peak-Lone Mountain Metamorphic Core Complex. [Thesis]. University of Nevada, Reno; 2018. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=10821834

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

West Virginia University

27. Tulu, Ihsan Berk. New Abutment Angle Concept for Underground Coal Mining.

Degree: PhD, Mining Engineering, 2012, West Virginia University

URL: https://doi.org/10.33915/etd.3578 ; https://researchrepository.wvu.edu/etd/3578

► In the Analysis of Retreat Mining Pillar Stability (ARMPS), Analysis of Longwall Pillar Stability (ALPS) and LaModel programs, the magnitude of the abutment loading adjacent… (more)

Subjects/Keywords: Mining engineering; Geotechnology

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APA (6^th Edition):

Tulu, I. B. (2012). New Abutment Angle Concept for Underground Coal Mining. (Doctoral Dissertation). West Virginia University. Retrieved from https://doi.org/10.33915/etd.3578 ; https://researchrepository.wvu.edu/etd/3578

Chicago Manual of Style (16^th Edition):

Tulu, Ihsan Berk. “New Abutment Angle Concept for Underground Coal Mining.” 2012. Doctoral Dissertation, West Virginia University. Accessed January 20, 2021. https://doi.org/10.33915/etd.3578 ; https://researchrepository.wvu.edu/etd/3578.

MLA Handbook (7^th Edition):

Tulu, Ihsan Berk. “New Abutment Angle Concept for Underground Coal Mining.” 2012. Web. 20 Jan 2021.

Vancouver:

Tulu IB. New Abutment Angle Concept for Underground Coal Mining. [Internet] [Doctoral dissertation]. West Virginia University; 2012. [cited 2021 Jan 20]. Available from: https://doi.org/10.33915/etd.3578 ; https://researchrepository.wvu.edu/etd/3578.

Council of Science Editors:

Tulu IB. New Abutment Angle Concept for Underground Coal Mining. [Doctoral Dissertation]. West Virginia University; 2012. Available from: https://doi.org/10.33915/etd.3578 ; https://researchrepository.wvu.edu/etd/3578

Colorado State University

28. Stoeber, Justin Neil. Effects of maximum particle size and sample scaling on the mechanical behavior of mine waste rock; A critical state approach.

Degree: 2012, Colorado State University

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=1511071

► A rigorous and systematic study on the effects of maximum particle size and sample scaling on the mechanical behavior of mine waste rock (… (more)

▼ A rigorous and systematic study on the effects of maximum particle size and sample scaling on the mechanical behavior of mine waste rock ( MWR) is presented. Materials tested were obtained from a similar location within the open pit of Barrick Gold Corporation's Goldstrike gold mine approximately 60 km northwest of Elko, Nevada. The collected field gradation was scaled using the parallel gradation technique in order to most accurately reproduce the fabric of the collected field material in the laboratory. The two MWR materials were shown to have drastically different mineralogy, which may be due to varying levels of in situ hydrogeologic weathering. Mechanical behavior of two MWR materials was systematically evaluated on 70-mm-diameter, 140-mm-tall specimens with a maximum particle size equal to 11.2 mm in drained isotropic and monotonic axisymmetric compression using a conventional triaxial device. Results from conventional triaxial tests in drained isotropic and monotonic axisymmetric compression were systematically compared to results presented by Fox (2011) for 150-mm-diamer, 300-mm-tall specimens with a maximum particle size equal to 25.0 mm for the same MWR materials also scaled using the parallel gradation technique and tested at the same levels of mean effective stress (p') in a large-scale triaxial device. Intrinsic critical state parameters were defined for each material in conventional scale triaxial testing. Results suggest the parallel gradation technique provides a reasonable way to estimate values of intrinsic critical state parameters during isotropic compression in large-scale applications using conventional triaxial tests provided that the range of D_R,Initial is similar between scales. Values of the critical state friction angle (&phis;_c) were determined to be within 2° of the larger scale specimens. Dilatancy rates measured in conventional scale unweathered specimens was found to be, on average, approximately twice of that measured in the large-scale specimens of the same material. The weathered material indicated no significant changes in average dilatancy rates between scales. Bolton's (1986) fitting parameters Q and R were determined to decrease with decreasing particle size where Bolton's stress – dilatancy relationship was found to predict values of the peak friction angle (&phis;_p) more accurately using values of Q and R obtained in large-scale triaxial tests where conventional scale specimens yielded consistently unconservative predictions of &phis;_p suggesting that conventional triaxial tests should not solely be used to characterize the mechanical behavior of large-scale materials. Particle breakage measured after each triaxial test indicated a relatively constant shift from pre to post test particle-size distribution curves between conventional and large-scale specimens. Additional results and comparisons of values such…

Subjects/Keywords: Geotechnology; Engineering, Civil; Engineering, Mining

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APA (6^th Edition):

Stoeber, J. N. (2012). Effects of maximum particle size and sample scaling on the mechanical behavior of mine waste rock; A critical state approach. (Thesis). Colorado State University. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=1511071

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Stoeber, Justin Neil. “Effects of maximum particle size and sample scaling on the mechanical behavior of mine waste rock; A critical state approach.” 2012. Thesis, Colorado State University. Accessed January 20, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=1511071.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Stoeber, Justin Neil. “Effects of maximum particle size and sample scaling on the mechanical behavior of mine waste rock; A critical state approach.” 2012. Web. 20 Jan 2021.

Vancouver:

Stoeber JN. Effects of maximum particle size and sample scaling on the mechanical behavior of mine waste rock; A critical state approach. [Internet] [Thesis]. Colorado State University; 2012. [cited 2021 Jan 20]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1511071.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Stoeber JN. Effects of maximum particle size and sample scaling on the mechanical behavior of mine waste rock; A critical state approach. [Thesis]. Colorado State University; 2012. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1511071

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Colorado School of Mines

29. Hurley, Christoph. Development of ammonium nitrate based explosives to optimize explosive properties and explosive welding parameters used during explosion cladding.

Degree: 2013, Colorado School of Mines

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=1533025

► The ability to accurately measure and predict the velocity of explosively driven flyer plates has been a subject of significant work by the explosives… (more)

Subjects/Keywords: Engineering, Mining; Engineering, Materials Science

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APA (6^th Edition):

Hurley, C. (2013). Development of ammonium nitrate based explosives to optimize explosive properties and explosive welding parameters used during explosion cladding. (Thesis). Colorado School of Mines. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=1533025

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Hurley, Christoph. “Development of ammonium nitrate based explosives to optimize explosive properties and explosive welding parameters used during explosion cladding.” 2013. Thesis, Colorado School of Mines. Accessed January 20, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=1533025.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Hurley, Christoph. “Development of ammonium nitrate based explosives to optimize explosive properties and explosive welding parameters used during explosion cladding.” 2013. Web. 20 Jan 2021.

Vancouver:

Hurley C. Development of ammonium nitrate based explosives to optimize explosive properties and explosive welding parameters used during explosion cladding. [Internet] [Thesis]. Colorado School of Mines; 2013. [cited 2021 Jan 20]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1533025.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Hurley C. Development of ammonium nitrate based explosives to optimize explosive properties and explosive welding parameters used during explosion cladding. [Thesis]. Colorado School of Mines; 2013. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=1533025

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Carnegie Mellon University

30. Omohundro, Zachary Meyer. Robot configuration for subterranean modeling.

Degree: 2009, Carnegie Mellon University

URL: http://pqdtopen.proquest.com/#viewpdf?dispub=3386044

► Void models are invaluable for understanding subterranean conditions and guiding underground operations, but many maps are inaccurate, missing or difficult to acquire. Underground voids… (more)

▼ Void models are invaluable for understanding subterranean conditions and guiding underground operations, but many maps are inaccurate, missing or difficult to acquire. Underground voids are inaccessible and often hostile to man and machine. Mapping and modeling of subterranean voids is a superb motivation for development of robots. Successful robot configurations for modeling subterranean worlds such as sewers, tunnels, mines and voids have yet to be created and characterized. This research identifies subterranean modeling tasks and exploration constraints. Modeling tasks range from limited two-dimensional cross sections to comprehensive, globally-referenced, three-dimensional coverage of vast voids. Entry constraints such as small diameter holes limit the size of robot configurations, but once inside, muck and obstacles require significant terrainability that only comes with larger size. Based on these conditions and constraints, robot configurations are conceived, developed, tested and classified. This research distinguishes three classes of robotic configuration for void modeling based on entry constraint and robot mobility. Portal Explorers are mobile robots featuring substantial locomotion, sophisticated sensing, and plentiful energy storage that can roam afar after being deployed via large diameter portals. Borehole Sensors provide exceptional modeling capability from fixed vantage points, while their miniaturization enables deployment down smallest diameter boreholes. Borehole Explorers combine some mobility with some borehole access miniaturization to acquire otherwise unobtainable model data. Mobility provides greater modeling coverage than possible with borehole sensors, while reconfigurability allows deployment via small diameter boreholes, enabling void access not possible with portal explorers. This research classifies subterranean modeling tasks, develops robots to address these tasks, and tests these robots by entering and modeling vast voids. Model data is used to evaluate the merits and limits of these important robot configurations. Additionally, field work provides insight into issues and operational approaches that are not otherwise apparent from lab work alone. Finally, future robot configurations and paradigms for subterranean robotics are envisioned.

Subjects/Keywords: Engineering, Mining; Engineering, Robotics

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APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6^th Edition):

Omohundro, Z. M. (2009). Robot configuration for subterranean modeling. (Thesis). Carnegie Mellon University. Retrieved from http://pqdtopen.proquest.com/#viewpdf?dispub=3386044

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Chicago Manual of Style (16^th Edition):

Omohundro, Zachary Meyer. “Robot configuration for subterranean modeling.” 2009. Thesis, Carnegie Mellon University. Accessed January 20, 2021. http://pqdtopen.proquest.com/#viewpdf?dispub=3386044.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

MLA Handbook (7^th Edition):

Omohundro, Zachary Meyer. “Robot configuration for subterranean modeling.” 2009. Web. 20 Jan 2021.

Vancouver:

Omohundro ZM. Robot configuration for subterranean modeling. [Internet] [Thesis]. Carnegie Mellon University; 2009. [cited 2021 Jan 20]. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3386044.

Note: this citation may be lacking information needed for this citation format:
Not specified: Masters Thesis or Doctoral Dissertation

Council of Science Editors:

Omohundro ZM. Robot configuration for subterranean modeling. [Thesis]. Carnegie Mellon University; 2009. Available from: http://pqdtopen.proquest.com/#viewpdf?dispub=3386044

Note: this citation may be lacking information needed for this citation format:
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