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1993年潞安矿务局王庄煤矿综采一队在工作面顶板破碎、出现断层、无炭柱、涌水量大等不利
In 1993, Lu’an Mining Bureau Wangzhuang coal mine fully mechanized coal mining team in the face roof broken, there is fault, no charcoal column, large amount of water and other unfavorable