Title: Safety mining analysis of water proof coal pillars by fully-mechanized top-coal caving method in the thick coal seam under thin bedrock overlain by thick alluvium
Abstract: Based on the analysis of engineering property of thick loose bed,water-bearing strata,water-resisting layer and bedrock weathered zone in thin overlying strata with thick alluvium in NO.87 district of the Zhuxianzhuang Coal Mine,comprehensive research methods,including of physical simulation,FLAC3Dnumerical simulation and in-situ measurement,are used to examine the overlying strata movement and failure laws by fullymechanized top-coal caving(FMTC) method of full-seam mining.The results show that the fourth aquifer group is characterized by weak water and poor supply conditions.The weathered zone of basement is of strong regenerated water tightness,and it can be mined under collapse pillars.The maximum caving height ratio of overburden strata is 1.69 with the FMTC method.Safe and efficient mining are achieved in water proof pillars with the FMTC method with a full-seam under-240m,so that significant economical benefits are obtained.
Publication Year: 2014
Publication Date: 2014-01-01
Language: en
Type: article
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Cited By Count: 1
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