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 122 for “"Coal mines"”.
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The Control of Diesel Particulates in Underground Coal Mines
… exposure to diesel particulate in underground coal mines. The four aims were to: a) Develop a method to test disposable diesel exhaust filters and if possible improve their performance b) Investigate the relationship between maintenance and diesel particulate generation c) Highlight the …
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Computerized planning technique for western surface coal mines, A
Includes bibliographical references.
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Computerized planning technique for western surface coal mines, A
Includes bibliographical references.
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Determining the size and life of underground coal mines
… and subsequently operating an underground coal mine. However, the problem has received little academic attention in the United States. Solutions to the problem tend to be subjective and based upon personal experience and managerial judgment rather than objective and based upon some …
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An economic evaluation of backfilling in Virginia's coal mines
… to eliminate environmental problems caused by coal waste dumps, improve coal recovery, and improve mine ventilation. However, backfilling is an additional operation in the coal mining cycle that can reduce productivity and increase production costs. This thesis identifies the backfilling …
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Design Criteria for Wireless Mesh Communications in Underground Coal Mines
… Act of 2006 was enacted in response to several coal mining accidents that occurred in the beginning of 2006. The MINER Act does not just require underground mines to integrate wireless communication and tracking systems, but aims to overall enhance health and safety in mining at both surface and …
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Tolerance of selected crops to gypsiferous water originating in coal mines
The disposal of gypsiferous water, generated in coal mining operations, has become a problem in the Mpumalanga Highveld region in South Africa. As part of an investigation into the feasibility of using this water for irrigation, sand and water culture experiments were conducted in a glasshouse and …
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Electron microscopic analyses of impactor samples from underground dieselized coal mines
Includes bibliographical references.
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Ultra-wideband radar for robust inspection drone in underground coal mines
Coal mines pose a high safety risk for human workers. An autonomous inspection drone would enable a coal mine operation to reduce this risk by minimizing the time spent by workers inside the mine. This inspection drone must be highly robust to the harsh environment of an underground coal mine, with …
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The mobility of metals in acid mine drainage from abandoned coal mines
… drainage originating in surrounding, abandoned coal mine workings. The upper Blesbokspruit (approximately 8 km) including the stream origin, AMD outwelling points, downstream AMD retention ponds and a small wetland were selected for this study. Water, sediment, precipitate, and algae samples …
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Economic and system feasibility study of municipal waste stowage in underground coal mines
Public concern about surface disposal of municipal waste offers the mining industry potentially enormous economic and environmental opportunities. If underground space created by mining can successfully be utilized for safe waste stowage during the mining process, there will be immediate and …
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Detection of collapses and communicating with inaccessible areas in underground coal mines using WSN
… sensor networks (WSN) are used in underground mines to monitor concentration of gases, temperature, and humidity. A WSN deployed in underground mines can also be used for localisation of miners and for detecting collapses. Underground coal mines consist of long and narrow tunnels, several …
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A study of the mineralogy of roof and floor strata associated with coal mines
The first conclusion that can be drawn from these results is the extreme variation in the size distribution of the particles of the material. Table nine shows the maximum, average and minimum percents of each size found in the roof shales, and table ten shows the same factors for the floor clays. …
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Applications of Thermal and Laser-Based Methods for Monitoring Airborne Particulates in Coal Mines
… to monitor airborne particulates in underground coal mines. Specifically, coal and mixed mineral mine dust, as well as, diesel particulate matter (DPM). These particulates have historically, and continue to have, significant health impacts on underground miners. Chapters 1 and 2 of this thesis …
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Time-lapse Passive Seismic Velocity Tomography of Longwall Coal Mines: A Comparison of Methods
… utilizing data from three underground longwall coal mines to produce a better understanding of the processes that lead to ground failure in mines, especially large, violent failures, such as bumps. Two of the datasets, US Western I and US Western II, were collected at bump-prone underground …
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The impact of legislation and other factors on the safety performance of Australian coal mines
… the current safety paradigm in the Australian coal mining industry and establish if the safety performance is improving. The number of fatalities, serious bodily injuries and high potential injuries is unsatisfactory according to community standards. People are still being killed and there is …
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Ground control ramifications and economic impact of retreat mining on room and pillar coal mines
As the coal reserves at shallow depths become exhausted companies have to develop deeper deposits and increase percentage extraction to maintain production levels. Total extraction for room and pillar mines can only be achieved by pillar extraction. The unsupported roof increases during pillar …
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The dynamic behaviour of rail vehicles operating at high speeds for manriding in British coal mines
… main classes of manriding trains used in British coal mines. The outcome of the modelling compares favourably with the results of tests carried out on actual vehicles. The investigation has shown that the safe speed at which trains may operate is ultimately restricted by the condition of the …
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Rapid FTIR analysis for respirable crystalline silica monitoring in coal mines using readily available sampling equipment
In coal mines, workers can be exposed to respirable coal mine dust (RCMD) in conjunction with respirable crystalline silica (RCS). Overexposure can pose serious health risks, including development of coal workers' pneumoconiosis (CWP) (also known as "black lung"). CWP has the potential to progress …
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