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Haul Truck Tires Recycling, Jessica N. Lizarazu 2016 University of Arkansas, Fayetteville

Haul Truck Tires Recycling, Jessica N. Lizarazu

Chemical Engineering Undergraduate Honors Theses

The disposal of large Off-the-Road (OTR) tires is an increasingly important concern. These tires can weigh up to 8,450 pounds with an overall diameter and width of approximately 140.7 inches and 45.1 inches respectively. OTR tires are used for mining vehicles such as haul trucks, wheel loaders, backhoes, graders, and trenchers. These new tires cost between $38,000 and $50,000 each, depending on multiple factors including oil prices and the cyclical nature of the industry. Haul trucks contain six tires per vehicle, and mines replace these tires around every 9-12 months. Statistics regarding discarded OTR tires ...


Determine The Potential Drill Utilization Improvements And Rock Fragmentation Requirements Using Directional Drilling In A Coal Mining Overburden Highwall Application, Kevin Dill 2016 Montana Tech of the University of Montana

Determine The Potential Drill Utilization Improvements And Rock Fragmentation Requirements Using Directional Drilling In A Coal Mining Overburden Highwall Application, Kevin Dill

Graduate Theses & Non-Theses

This project analyzed the efficiency of incorporating the use of directional drilling technology into coal overburden blasting. Directional drilling is currently in use in the petroleum industry and it is believed that it will be a valuable asset in the mining industry. This project has shown that directional drilling can be a viable technology for use in the coal overburden removal process resulting in increased drill utilization and potential for cost savings. Future work regarding blasting and geotechnical evaluation should be performed to solidify the concept.


Pseudo Leadership And Safety Culture, T. W. Camm 2016 Montana Tech

Pseudo Leadership And Safety Culture, T. W. Camm

Mining Engineering

Search Amazon.com using the keyword “leadership,” and you are rewarded with a list of over 144,000 titles. There is no shortage of books and articles, many of them well written, with excellent ideas. So why is there still a constant cry for effective leadership in organizations? Often, the person in charge has personal blinders that prevent them from seeing or understanding how to implement the newest leadership idea or method. Either deliberately or subliminally, there is a disconnect from learning about leadership, and actually modelling and implementing what has been learned. Some current research in leadership theory can ...


Rock Dust Surface Chemistry Modifications For Eliminating Cake Formation And Improving Dispersion In Coal Dust Explosion Mitigation Applications, Qingqing Huang 2016 University of Kentucky

Rock Dust Surface Chemistry Modifications For Eliminating Cake Formation And Improving Dispersion In Coal Dust Explosion Mitigation Applications, Qingqing Huang

Theses and Dissertations--Mining Engineering

Rock dust has been historically applied to mitigate the coal dust explosion in either dry or wet form. Dry rock dust performs best in inerting the potential coal dust explosion due to the greatest dispersive properties. However, it undesirably exposes underground coal miners to respirable dust particles which imposes a severe health danger. Wet dust application is able to significantly reduce the floatable dust particles but another problem associated with caking is predominant. Caking phenomenon is usually used to describe the change of free-flowing bulk solids into agglomerated chunks. Unfortunately, the environmental conditions of an underground mine have the potential ...


Techno-Economic Potential Of Enhanced Coal Recovery Through Middlings Liberation And Re-Processing, Shivani 2016 University of Kentucky

Techno-Economic Potential Of Enhanced Coal Recovery Through Middlings Liberation And Re-Processing, Shivani

Theses and Dissertations--Mining Engineering

The typical preparation plant producing coal for the utility market targets a relative separation density in the plant of around 1.60 whereas plants generating metallurgical coal use relative cut point density values approaching 1.50. In some cases, achieving the specified coal quality requires operating at lower cut point values, which results in a significant loss of valuable coal. In these situations, a middlings stream can be produced using a secondary separator or a three-product unit, which would allow crushing of the middlings for liberation purposes and re-introduction into the plant feed. In this manner, higher quality coal can ...


Modern Rock Dust Development And Evaluation For Use In Underground Coal Mines, Robert Eades 2016 University of Kentucky

Modern Rock Dust Development And Evaluation For Use In Underground Coal Mines, Robert Eades

Theses and Dissertations--Mining Engineering

Following the promulgation of new permissible respirable dust standards by MSHA in 2014, new alternative rock dusts were created that combined the advantages of current industry applications while potentially reducing miner exposure to respirable dust. Research was performed to compare the explosion suppressing and ejection characteristics of three new types of rock dust to existing rock dust types. Explosion suppression tests were conducted in a 38-L chamber where pressures were recorded. Angle of ejection tests were conducted using a high explosive shock tube and high speed photography to determine angle of ejection and lift velocity. A comprehensive comparison of the ...


Pore Pressure Measurement Instrumentation Response To Blasting, Kylie M. Larson-Robl 2016 University of Kentucky

Pore Pressure Measurement Instrumentation Response To Blasting, Kylie M. Larson-Robl

Theses and Dissertations--Mining Engineering

Coal mine impoundment failures have been well documented to occur due to an increase in excess pore pressure from sustained monotonic loads. Very few failures have ever occurred from dynamic loading events, such as earthquakes, and research has been done regarding the stability of these impoundment structures under such natural seismic loading events. To date no failures or damage have been reported from dynamic loading events caused by near-by production blasting, however little research has been done considering these conditions. Taking into account that current environmental restrictions oblige to increase the capacity of coal impoundments, thus increasing the hazard of ...


Mechanics Of Impulse Force Reduction For Mitigating Dump Truck Vibrations Under Hislo Conditions, Danish Ali 2016 Missouri University of Science and Technology

Mechanics Of Impulse Force Reduction For Mitigating Dump Truck Vibrations Under Hislo Conditions, Danish Ali

Masters Theses

"The deployment of large capacity shovels and dump trucks, for achieving economic bulk production capacities, has resulted in high impact shovel loading operations (HISLO). These large shovels generate high impact forces when loading dump trucks with over 100-ton passes under gravity. The impact forces also generate high frequency shock waves, which cause severe truck vibrations, and thus, expose dump truck operators to high levels of whole body vibrations (WBV). The dynamic impact force generates these vibrations, and thus, there is a need to develop efficient technologies to eliminate or reduce its impact. Existing literature and industry practice show that this ...


Subterranean Photobioreactors For Commercial-Industrial Scale Algal Culture, Daniel James Vidt 2016 Missouri University of Science and Technology

Subterranean Photobioreactors For Commercial-Industrial Scale Algal Culture, Daniel James Vidt

Doctoral Dissertations

"There are many potential benefits to the mining industry accruing from the application of algal biotechnology. The main benefits are in the production of biodiesel and in the remediation of mining brownfields. The research in this study was centered in the original idea that these brownfields represent a tremendous opportunity for use as a hybrid model for redevelopment into sustainable "mines" of biomass. The ability of these underground spaces serving as bioreactors to control all aspects of the growing environment, from lighting, to temperature, to biosecurity, are key advantages that have been identified in the literature. The many benefits inherent ...


Dynamic Impact Of Ageing Dump Truck Suspension Systems On Whole-Body Vibrations In High-Impact Shovel Loading Operations, Saeid R. Dindarloo 2016 Missouri University of Science and Technology

Dynamic Impact Of Ageing Dump Truck Suspension Systems On Whole-Body Vibrations In High-Impact Shovel Loading Operations, Saeid R. Dindarloo

Doctoral Dissertations

"Surface mining operations typically deploy large shovels, with 100+ tons per pass capacity, to load dump trucks in a phenomenon described as high-impact shovel loading operations (HISLO). The HISLO phenomenon causes excessive shock and vibrations in the dump truck assembly resulting in whole body vibration (WBV) exposures to operators. The truck suspension system performance deteriorates with time; therefore their effectiveness in attenuating vibrations reduces. No research has been conducted to study the impact of ageing suspension mechanisms on the magnitudes of WBV in HISLO operations.

This study is a pioneering effort to provide fundamental and applied knowledge for understanding the ...


Applications Of Simulation And Optimization Techniques In Optimizing Room And Pillar Mining Systems, Angelina Konadu Anani 2016 Missouri University of Science and Technology

Applications Of Simulation And Optimization Techniques In Optimizing Room And Pillar Mining Systems, Angelina Konadu Anani

Doctoral Dissertations

"The goal of this research was to apply simulation and optimization techniques in solving mine design and production sequencing problems in room and pillar mines (R&P). The specific objectives were to: (1) apply Discrete Event Simulation (DES) to determine the optimal width of coal R&P panels under specific mining conditions; (2) investigate if the shuttle car fleet size used to mine a particular panel width is optimal in different segments of the panel; (3) test the hypothesis that binary integer linear programming (BILP) can be used to account for mining risk in R&P long range mine production sequencing; and (4) test the hypothesis that heuristic pre-processing can be used to increase the computational efficiency of branch and cut solutions to the BILP problem of R&P mine sequencing.

A ...


Cable Shovel Dipper Stress And Fatigue Failure Modeling In Formation Excavation Engineering, Muhammad Azeem Raza 2016 Missouri University of Science and Technology

Cable Shovel Dipper Stress And Fatigue Failure Modeling In Formation Excavation Engineering, Muhammad Azeem Raza

Doctoral Dissertations

"Large capacity shovels are used to achieve economic bulk production in surface mining operations. The suspended payload combined with dipper weight and formation resistive forces results in severe stress loading of the shovel front-end assembly. Material flaws, high stresses and harsh excavation conditions can initiate cracks in the dipper-teeth assembly. High stresses can cause these cracks to propagate to critical lengths resulting in fatigue failure, unscheduled downtimes, costly unplanned repairs, and downstream processing circuit problems. The literature reveals that dipper-related problems significantly reduce shovel up-time. This research is a pioneering effort towards developing a solid frame work for stress profiling ...


Investing In Least Developed Countries: The Aynak Copper Mine Project, Roosevelt Barfield 2016 Walden University

Investing In Least Developed Countries: The Aynak Copper Mine Project, Roosevelt Barfield

Walden Dissertations and Doctoral Studies

The rise of market globalization creates challenges for business executives seeking to pursue foreign direct investment (FDI) in least developed countries (LDC), such as Afghanistan. Multinational corporate (MNC) executives need strategies that will improve the timely delivery of minerals for mining projects in LDCs. Guided by the force field analysis theory, the purpose of this holistic, single-case study was to explore the strategy that 5 MNC executives in Beijing, China, used to improve the timely delivery of minerals associated with the Aynak copper mine project in Afghanistan. Semistructured interviews were used to elicit detailed narratives from MNC executives about their ...


Investing In Least Developed Countries: The Aynak Mine Project, Roosevelt Barfield 2016 Walden University

Investing In Least Developed Countries: The Aynak Mine Project, Roosevelt Barfield

Walden Dissertations and Doctoral Studies

The rise of market globalization creates challenges for business executives seeking to pursue foreign direct investment (FDI) in least developed countries (LDC), such as Afghanistan. Multinational corporate (MNC) executives need strategies that will improve the timely delivery of minerals for mining projects in LDCs. Guided by the force field analysis theory, the purpose of this holistic, single-case study was to explore the strategies that 5 MNC executives in Beijing, China, used to improve the timely delivery of minerals associated with the Aynak copper mine project in Afghanistan. Semistructured interviews were used to elicit detailed narratives from MNC executives about their ...


Information Seeking Behaviour Of Petroleum Engineers In Niger Delta Region Of Nigeria: A Survey, EDONKUMOH VICTOR EBIYE (MLIS), NGWUCHUKWU M. N (PhD), EMMANUEL AGYO (MLIS) 2015 NIGER DELTA UNIVERSITY, BAYELSA STATE, NIGERIA

Information Seeking Behaviour Of Petroleum Engineers In Niger Delta Region Of Nigeria: A Survey, Edonkumoh Victor Ebiye (Mlis), Ngwuchukwu M. N (Phd), Emmanuel Agyo (Mlis)

Library Philosophy and Practice (e-journal)

The success of the petroleum industry at all levels depend largely on petroleum engineers’ awareness and access to relevant information for making sound Exploration and Production decisions. This study investigated the information seeking behaviour of Petroleum Engineers in selected companies in the Niger Delta Region of Nigeria. A survey design was adopted using questionnaire as the instrument for collecting primary data from 250 petroleum engineers randomly selected from four oil companies. Data gathered were analysed using frequencies, simple percentages and mean score count. Results showed that petroleum engineers spent time seeking health and safety information, oil and gas E&P ...


Karst Paleo-Collapses And Their Impacts On Mining And The Environment In Northern China, Gongyu Li, Wanfang Zhou 2015 Xi’an Research Institute of China Coal Technology & Engineering Group Corp

Karst Paleo-Collapses And Their Impacts On Mining And The Environment In Northern China, Gongyu Li, Wanfang Zhou

Sinkhole Conference 2015

Karst paleo-collapses are unique collapse structures widely found in the coal measures of northern China. Their geometric dimensions and internal properties indicate that a compound dissolution of carbonate and gypsum rocks may contribute to their formation. When these collapses are permeable to groundwater flow, they hydraulically connect the coal seams and the karst aquifers, which is a pre-requisite for water inrushes during coal mining. Over the last 40 years, water inrushes through these collapses have caused fatalities, economic losses, and degradation in the environment in northern China. Determination of locations and hydrogeological characteristics of the karst paleo-collapses are essential in ...


All-In Sustaining Cost Analysis, Asseu Gilbert Yapo 2015 Montana Tech of the University of Montana

All-In Sustaining Cost Analysis, Asseu Gilbert Yapo

Graduate Theses & Non-Theses

Cost reporting has focused on the direct cost of mining and processing ore which was summarized in the non-GAAP cash cost developed by the Gold Institute in 1996. In 2013, a group of mining companies, working with the World Gold Council, developed a more inclusive approach to reporting costs designed to solve the dilemma of showing a more comprehensive reflection of recurring costs involved in producing gold, without discouraging investors.


Review Of Sampling And Evaluation Techniques For Diesel Exhaust Particulate Matter In The Mining Industry And The Application Of A Vapor Phase Organic Carbon Correction Factor, Ryley Bosch 2015 Montana Tech of the University of Montana

Review Of Sampling And Evaluation Techniques For Diesel Exhaust Particulate Matter In The Mining Industry And The Application Of A Vapor Phase Organic Carbon Correction Factor, Ryley Bosch

Graduate Theses & Non-Theses

The health effects associated with diesel exhaust exposure have been documented for decades. However, methods used to assess diesel exhaust have experienced considerable revision over the past twenty years. The latest sampling methodology considers particulate matter elemental carbon (EC) and organic carbon (OC) analysis along with the vapor phase OC analysis. The objective of this study was to evaluate the influence of vapor phase OC on the current National Institute for Occupational Safety and Health (NIOSH) method 5040 sampling and evaluation techniques for diesel exhaust particulate matter.

A pilot study was conducted as part of a larger study evaluation biodiesel ...


Iron Pigments Through The Ages, Fathi Habashi 2015 Laval University, Quebec City, Canada

Iron Pigments Through The Ages, Fathi Habashi

Fathi Habashi

Naturally occurring iron oxides were used since ancient times as ochre yellow and red pigments. It was only in the 18th century that artificially prepared Prussian blue was discovered. This discovery opened up a new field of chemistry - - cyano compounds.


3d Topographic Stress Perturbations And Implications For Ground Control In Underground Coal Mines, Ashley Griffith, James Becker, Krysta Cione, Tim Miller, Ernian Pan 2015 University of Akron Main Campus

3d Topographic Stress Perturbations And Implications For Ground Control In Underground Coal Mines, Ashley Griffith, James Becker, Krysta Cione, Tim Miller, Ernian Pan

Ernian Pan

It is well known that the perturbed stress field beneath valleys can result in roof instabilities in shallow underground coal and stone mines. Quantitatively predicting the magnitude of these stress perturbations, particularly beneath complicated three-dimensional (3D) topography, has not become commonplace in mine planning, perhaps due to the complexity and time-consuming nature of the problem. Here we utilize 3D digital elevation models and the 3D boundary element method (BEM) approach to efficiently calculate the pre-mining topographically perturbed stress field in the vicinity of the Carroll Hollow coal mine in eastern Ohio. We find that regions of elevated compressive stress in ...


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