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Keywords: roof collapse
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Proceedings Papers

Paper presented at the 1st North American Rock Mechanics Symposium, June 1–3, 1994
Paper Number: ARMA-1994-1033
... catastrophic failures occurring when mining coal under strong roof. The U.S. Bureau of Mines presents a hypothesis that catastrophic mine roof failure is due to the fonnation of a macrocrack (dilatant zone) in the rock mass above a pillar or longwall panel immediately before roof collapse. The macrocrack...

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