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Geology / Sedimentology / Mine Safety and Health Administration / Seatearth / Longwall mining / Coal mine bump / Coal / National Institute for Occupational Safety and Health / Coal mining / Sedimentary rocks / Mining


Geologic Hazards and Roof Stability in Coal Mines
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Document Date: 2012-08-29 17:21:32

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File Size: 3,85 MB

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