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Theoretical analysis and application of coal pillar preserve in Selian second coal mine
Lei Chengxiang, Chen Miaohu, Deng Runyi, Fu Baojie
1. Huainan Western Mine Investment Management Corporation Ltd., Erdos 017000, China; 2. Shool of Energy and Security of Anhui University of Science and Technology, Key Laboratory of Coal Mine Safety and High Efficiency Mining, Ministry of Education, Huainan 232001, China


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