Abstract:Coal mine backfilling mining controls the movement of overlying rock and surface subsidence by backfilling the fractured rock mass into the goaf. The compaction mechanical performance of the fractured rock is the key to the effectiveness of overlying rock control. In order to optimize the control effect of crushed gangue overlying rock, this article focuses on the regulating effect of gangue particle size grading on mechanical properties. Through research on the physical properties of gangue and natural graded… Show more
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