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Application and setting principles of rational width of water proof coal pillar
Wang Bing1, Sun Jiang2, Gao Yuan3
1. Zhaoguan Mine of Shandong Energy Xinwen Mining Group, Dezhou 253000; 2. Gucheng Mine of Shandong Energy Lingxi Mining Group, Jining 272000, China; 3.China University of Mining and Technology(Beijing), Beijing 100083, China


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