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Showing 1 to 20 of 153 for “"Coal mine"”.
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Coal mine engineering
Made available in DSpace on 2016-11-09T23:47:49Z (GMT). No. of bitstreams: 2 5964247.pdf: 10522448 bytes, checksum: 04443ea845c9860b36b2dd8739636dfd (MD5) license.txt: 4183 bytes, checksum: 1dcc2037833d76bede73d5717587543b (MD5) Previous issue date: 1905
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Temperature profiles around coal mine openings
Includes bibliographical references.
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Numerical Modeling of Room-and-Pillar Coal Mine Ground Response
Underground coal mine ground control persists as a unique challenge in rock mass engineering. Fall of roof and rib continue to present a hazard to underground personnel. Stability of underground openings is a prerequisite for successful underground coal mine workings. An adaptation of a civil …
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Centrifuge modelling of permeability in a heterogeneous coal mine backfill sequence
… a favoured method for the extraction of the vast coal reserves in the Highveld of South Africa. Previously backfilled and restored open cast areas are generally zoned for agricultural uses, but with growing pressures on land use, such areas are increasingly being considered for the expansion of …
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Investigation into the applicability of AVO techniques to coal mine exploration
… and Sandstone roofs over a 6 meters thick coal seam, in the region of Daw Mill (UK). It moreover presents a modification of a triaxial cell aimed at calibrating AVO in the laboratory, and thereby improving the quality of AVO analysis in general. The analysis presented in this PhD thesis …
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Coal mine waters in South Africa : their geochemistry, quality and classification
Includes bibliographical references.
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Approaches and Barriers to Incorporating Sustainable Development Into Coal Mine Design
It is widely recognized that coal is and will continue to be a crucial element in a modern, balanced energy portfolio, providing a bridge to the future as an important low-cost and secure energy solution to sustainability challenges. The designer of coal mining operations needs to simultaneously …
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Geologic and geotechnical controls on the stability of coal mine entries
Roof and rib failures in underground coal mines are one of the major problems facing the industry today. In addition to safety considerations, the resulting economic impact of such failures is staggering. Uncovering and replacing buried and damaged equipment and clearing entries can account for a …
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Characterization and quality of soils developing on a mountaintop removal coal mine
Mountaintop surface mining for coal has been practiced in West Virginia for over three decades, but its environmental impacts have become increasingly scrutinized in recent years. Therefore, this study evaluated soil development on different aged mined lands. Four different ages (2, 7, 11, and 23 …
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The Persistence of Acid Mine Drainage at an East Texas Coal Mine
… in ground and surface waters within Oak Hill Mine. This was accomplished using an ex-situ kinetic leaching study incorporating a humidity cell in a controlled laboratory setting. Leaching was conducted on soil cores obtained from the vadose zone at Oak Hill Mine and the humidity cell was used …
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A Study of Mine-Related Seismicity in a Deep Longwall Coal Mine
This study involves seismic monitoring of a deep coal mine. The purpose is to examine the processes responsible for induced seismicity. A seismic network consisting of five three-component short-period seismometers located above the mine recorded the seismic data. The events discussed here occurred …
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Effect of in-situ stresses on the stability of coal mine development workings
… control 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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Application of water mist to fuel-rich fires in model coal mine entries
As the nature of coal mInmg changes, to higher production associated with higher mechanization, the way in which mine safety is approached must also change. This situation was clearly shown in a very devastating coal mine fire in late 1984. In the absence of effective fire-fighting procedures and …
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Effects of Dust Controls and Dust Sources on Respirable Coal Mine Dust Characteristics
Respirable coal mine dust (RCMD) continues to pose serious health hazards to workers. Over the past few decades, new regulations, monitoring technologies, and improved dust controls have emerged, and all are based on the presumption that limiting RCMD on the basis of mass will effectively mitigate …
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Determining the Sustainability of Coal Mine Cavity Discharge as a Drinking Water Source
… of water in this region is flooded abandoned coal mines. One such coal mine aquifer was chosen for a sustainability study in Dickenson County, Virginia. A flowrate monitoring system was installed at the point of discharge from the mine, and the flow records from three months of data collection …
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Microseismic Monitoring of a Room and Pillar Retreat Coal Mine in Southwest Virginia
Ground control, one of the key elements in mine safety, is an issue that warrants continuous improvement in the underground coal industry. The United States experienced over 3,300 injuries and 42 deaths between 2006 and 2012 from the fall of a roof or rib (MSHA, 2015). Out of the underground coal …
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Soil Moisture Measurements and Modeling at a Geomorphically Reclaimed Coal Mine in New Mexico
… were collected for laboratory tests from the mine site located in northwest New Mexico. Saturated and unsaturated hydraulic properties were determined from falling head tests, hanging column tests, pressure plate tests, and dew point potentiometer measurements. In addition, hydraulic …
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Demonstration of Optical Microscopy and Image Processing to Classify Respirable Coal Mine Dust Particles
Inhalation of respirable coal mine dust (RCMD) can lead to chronic lung diseases, including coal worker’s pneumoconiosis (CWP) and more severe forms such as progressive massive fibrosis. After the Federal Coal Mine Health and Safety Act was passed in 1969, limits on exposure to respirable dust were …
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