Floor failure depth of upper coal seam during close coal seams mining and its novel detection method
作者： Wei Zhang , Dongsheng Zhang , Dahong Qi , Wenmin Hu , Ziming He
关键词: Coal mining 、 Mining engineering 、 Primary problem 、 Geology
摘要: … of the upper coal seam. In this study, according to the mining and geological conditions of close coal seams (#10 and #11 coal seams) in the Second Mining Zone of Caocun Coal Mine, …
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