Roof Broken Characteristics and Overburden Migration Law of Upper Seam in Upward Mining of Close Seam Group
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DOI: 10.1007/s10706-019-00836-x
Abstract: Aiming at the problem that the roof broken characteristics and overburden migration law of upper coal seam are not clear due to the disturbance of repeated mining in underlying coal seams, this paper takes a… read more here.
Keywords: seam; characteristics overburden; coal; broken characteristics ... See more keywords