Mineralogical investigation of coal mine roof shales in part of the southern Appalachian coal field
Many coal mines in southwestern Virginia and West Virginia are plagued with excessive deterioration of roof shales. Shale flakes and sheets spall off the roofs at unpredictable intervals and create hazards in many coal mines (P1.1). The failures are more frequent during the summer months when the in...
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| Format: | Others |
| Language: | en_US |
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Virginia Polytechnic Institute
2015
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| Online Access: | http://hdl.handle.net/10919/53781 |