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Study on comprehensive gas extraction effect of fully mechanized caving face in close distance coal seam group
Chen Zhiyong 1, Fei Junbo 2, Liu Shuai 2, Qu Yansi1
1. Chongqing Research Institute Co., Ltd., Chongqing 400037, China; 2. Shaanxi Coal
Hancheng Mining Co., Ltd., Weinan 715400, China


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