近距离煤层群下位煤层沿空留巷合理布置研究
程志恒，齐庆新，孔维一，张浪，季文博，刘晓刚
Study on the reasonable layout of gob-side remained gateway of lower coal seam close to coal seam group
CHENG Zhiheng，QI Qingxin，KONG Weiyi，ZHANG Lang，JI Wenbo，LIU Xiaogang
采矿与安全工程学报
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2015, (3): 453
-458
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