下沟煤矿本煤层预抽钻孔合理封孔长度研究

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崔宏磊邢立杰孙赫黄文军

Study on Reasonable Sealing Length of Predrilled Hole in the Coal Seam of Xiagou Coal Mine

CUI Honglei XING Lijie SUN He HUANG Wenjun

现代矿业 . 2020, (11): 73 -75 .