Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 27 for “"Mining operation"”.
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A modern mining operation for the Virginia semianthracite coal field
A study or the possibility of a modern mining operation in the Valley Coal Fields of Virginia begins with a brief history of previous mining operations in the area. Following this is a study of the geological occurrence and a geographical description of the site selected. The deposit is studied …
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A mixed integer model for optimizing equipment scheduling and overburden transport in a surface coal mining operation
… competition has increased in the surface coal mining industry, which has necessitated the development of more efficient methods for coal removal. Despite this trend, very little emphasis has been placed on the development of optimization techniques applicable to the surface coal industry. The …
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An integrated computer simulator for surface mine planning and design
… to develop mathematical models for surface mining which can estimate mining costs before the actual mining begins. The problem becomes even more acute with the new reclamation laws, as they affect surface coal mining methods, productivity, and costs. This study presents a computer simulator …
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Application of STPA-Sec for analyzing cybersecurity of autonomous mining systems
Autonomy is seen as the next big thing in the mining industry. For mine operators there are benefits to be gained in terms of higher productivity, inherent safety, lower operational expense, and improved asset management, just to name a few. Original equipment manufacturers (OEM) and dealerships …
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Geologic feature prediction using roof bolter drilling parameters
… system is essential for any underground coal mining operation. All underground coal mines in the United States install roof bolts with a roof bolter as the primary means of supporting the mine roof. Proper application of roof bolting is dependent upon knowledge of the mine roof …
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A Risk-Based Pillar Design Approach for Improving Safety in Underground Stone Mines
… catastrophic event with great consequences for a mining operation. These events are not uncommon, and have been reported to produce air blasts able to knock down, seriously injury or kill miners; cause cascade pillar failures which involve the collapse of neighboring pillars; produce surface …
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An application of the hedonic approach to estimating prices for steam coal contract terms
The hedonic approach involves determining the characteristics of a good or service that have a market price. Simultaneously, estimates of those prices are made using regression analysis. Both delivered and FOB mine prices are examined in regional U.S. markets. The steam coal contract terms examined …
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Effect of in-situ stresses on the stability of coal mine development workings
… problems associated with underground coal mining, those related to in-situ stresses are the most common ones affecting the safety of a mining operation. As a result, this has been the focus of many ground control research works done in the recent years. More work has been done in this …
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Analyses of coal extraction and spoil handling techniques in mountainous areas
Surface mining of multiple seams by mountaintop mining methodology is complex in the Appalachian region of West Virginia. Mining operations in these mountainous areas can be considered as customized forms of surface mining techniques. The customization of the mining methods is greatly dominated by …
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Energy efficiency and carbon dioxide emissions across different scales of iron ore mining operations in Western Australia
… last two decades, Western Australian iron ore mining industry experienced an exponential production growth arising from increased global demand for steel. The upturn in the iron ore price and considerably lower production cost encouraged extensive mining and consequently high-grade ore reserves …
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Sediment plumes and financial modeling in the context of deep-sea polymetallic nodule mining
Deep-sea polymetallic nodule mining commercial operations are close to becoming a reality. In recent years, research activity in the field has substantially increased, but there are yet many technical, environmental and financial challenges to be addressed. This work tackles three critical topics …
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Physical, chemical and mineralogical properties of mine spoil derived from the Wise Formation, Buchanan County, Virginia
… the closely spaced blast-hole grid used in the mining operation. Wet-dryfreeze-thaw forces are effective in causing disarticulation of the weakened rocks in 6 months or less. The silty spoils cause excessive dust, are crusted and support ponds. Application of organic amendments promotes …
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Investigating strategies to improve superior sustainable performance in the Namibian mining industry
The mining industry is the primary sector anchor and the largest contributor to the gross domestic product (GDP) of the Namibian economy and it can potentially drive the country towards industrialization by adding value to its products via the implementation of the Mineral Beneficiation Strategy …
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Change of support correction in mineral resource estimation
The success of any mining operation greatly, if not entirely, depends on the accuracy of prediction of recoverable mining reserves. However, prior to mining, knowledge about the distribution of the Selective Mining Unit (SMU) is limited. The SMU represents the volume on which extraction of ore …
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Exploring the low income rental housing market in the platinum mining sector for inclusive business opportunities
The South African mining sector faces growing expectations from the academic, political, and regulatory spheres to play a greater role in facilitating development in communities affected by mining operations. The facilitation of affordable decent housing for lower-income employees is one of these …
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Some factors in the use of roof bolts for mine roof control
… deposits are in equilibrium,—any underground mining operation upsets this equilibrium. Shocks due to the unbalancing of stresses often time cause catastrophic roof-falls which kill and injure miners and damage equipment. Attempts are made to control these unbalanced stresses by choosing the …
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Biological and Membrane Treatment Applications for the Reduction of Specific Conductivity and Total Dissolved Solids in Coal Mine Waters
… health of streams that are impacted by coal mining operations in the Appalachian region of the United States. Due to this, government environmental regulatory bodies have been considering issuing a regulation on SC for all mining operation outfalls. Sulfate typically has the greatest …
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An Improved Model for Prediction of PM10 from Surface Mining Operations
… required for the construction of all new surface mining operations. An air quality permit requires a surface mining operation to estimate the type and amount of pollutants the facility will produce. During surface mining the most common pollutant is particulate matter having an aerodynamic …
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The Effects of Backfilling on Ground Control and Recovery in Thin-Seam Coal Mining
… and economically. Past experience with highwall mining of thin-seam coal has indicated that recovery rates tend to be lower than in conventional operations. It is suspected that this will also apply to underground thin-seam mining, regardless of proposed technology or mining method. A method of …
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Mineralogical Characterization of Uranium Ores, Blends and Resulting Leach Residues from Key Lake Pilot Plant, Saskatchewan, Canada
… process and leach residues from the Key Lake mining operation, Saskatchewan. This study also evaluated the alteration of the clay minerals in these uranium ores, waste rocks and leach residues. X-ray diffraction, electron micro-probe, and mineral liberation analyses showed that the reservoirs …
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