煤炭科学技术
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Research on strong strata behaviours mechanism and prevention technology of heading roadway in extra-thick coal seam
Dai Wenxiang��Kong Linghai��Zhang Ningbo��Feng Yufeng
1��Tashan Mine,China Coal Datong Energy Co��,Ltd��,Datong037001,China�� 2��Mine Safety Technology Branch ,China Coal Research Institute Co.,Ltd.��Beijing100013��China�� 3��State Key Laboratory of Coal Mining and Clean Utilization��Beijing100013��China

 

             

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