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Study on the development characteristics of roof water conduction fracture zone in No.1502 Face of Shaozhai Coal Mine
Li Yexing1, Zhang Zitong2, Fu Song2
1. Jiangxi Non-ferrous Geological and Mineral Exploration and Development Institute, Nanchang 330030, China;
2. Shandong Institute of Metrology, Jinan 250014, China


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