Keyword [layered mining of extra-thick coal seam] Result: 1 - 2 | Page: 1 of 1 1.  Study On Evolution Of Overlying Cracks And Gas Migration In Layered Mining Of Extra-thick Coal Seam 2.  Research On Evolution Law Of Crack Field In Overlying Strata In Layered Mining Of Extra-thick Coal Seam And Prevention And Control Technology Of Coal Leftover Spontaneous Combustion In Goaf   <<First  <Prev  Next>  Last>>  Jump to

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