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Ground Failures In Coal Mines With Weak Roof

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Cutter roof failure is a commonly reported failure mechanism in coal mine roadways. Hill 1986 defined it thus cutter roof failure in mine roof rock is a failure process that initially begins as a fracture plane in the roof rock parallel to and located at the roofrib intersection.The failure propagates upward into the roof over the mine opening at an angle usually steeper than 60 from

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