Keyword [top coal broken] Result: 1 - 5 | Page: 1 of 1 1.  Study Of Top-Coal Broken And Drawing Speed Of Working Face 2.  Study On Key Problems Of Roadway Caving Mining In Steep Medium-thickness Seam 3.  Mechanism And Control On Mining Induced Influences Around Longwall Top Coal Caving Face In Extra Seam With Complex Structures 4.  Overburden Movement Pattern Of Fully Mechanized Sublevel Caving Longwall Face 120210 Of Zaoquan Coal In Steep And Variable Inclined Seam 5.  Study On Laws Of Strata Behavior And Top Coal Cracking Of Fully Mechanized Top Caving Mining Face With Large Mining Height In Extra Thick Coal Seam   <<First  <Prev  Next>  Last>>  Jump to

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