Keyword [room-pillar goaf] Result: 1 - 2 | Page: 1 of 1 1.  Study On The Roof Safe Thickness Of Thallow Buried Room Pillar Goaf Treated By Open Pit Stripping In Guojiawan Coal Mine 2.  Research On The Law Of Overlying Rock Failure In The Goaf Of Coal Mine   <<First  <Prev  Next>  Last>>  Jump to

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