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mining process of zinc coal gangue

Analysis of Strata Behavior in the Process of Coal Mining by Gangue Backfilling MIAO Xie-xing1,ZHANG Ji-xiong2(1.State Key Laboratory for Geomechanics & Deep Underground Engineering,China University of Mining & Technology,Xuzhou,Jiangsu 221008,China;2.School of Mining and Safety Engineering,China University of Mining & Technology,Xuzhou,Jiangsu ...

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