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Tunneling through soft rock and tunneling underground require different approaches. Blasting in soft, firm rock such as shale or limestone is difficult to control ...
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Roof fall accidents decline, but remain leading cause of coal miner injuries MSHA initiative promotes continuous mining machine operator safety
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Underground Mining. Two dominant methods together account for the vast majority of underground coal mining: "room and pillar" and "longwall" mining.
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Vanity Fair article examines mountaintop removal mining and its impact on the citizens of Appalachia. Includes photographs. By Michael Shnayerson.
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A tunnel is an underground passageway, dug through the surrounding soil/earth/rock and enclosed except for entrance and exit, commonly at each end.
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