Selection and analysis of rational mining height of shallow coal seam with thin bedrock

摘要：

　　Crushing accidents often appear in thin bedrock shallow thick coal seam of Shengdong mining area in mining, the size of the mining height affects the stability of the overlying rock directly.In order to determine the reasonableness mining height, the paper analyzed of the effect of different mining height on Shendong trial coal mining face which the Shallow buried depth of coal thickness was 5.7 m by theoretical calculations and numerical simulation method.The results show that when the mining height is small, Roof sliding instability occurs easily, but with the mining height increases, the instability of the rotation angle increases and caving and fractured zone expansion upward, loose sand overlying layer can not form a stable structure after the bedrock breaking, eventually leading to pressure frame accident.Finally analysis to get the rational mining height of this working face is 4.5 ~ 5.2 m.

关键词： thin bedrock shallow coal seam mining height numerical simulation

作者: PENG Chao LIU Wan-rong

作者单位: School of Resource and Safety Engineering ,Anhui University of Science and Technology, Huainan 232001 ,China;Key Laboratory of Safety and High-efficiency Coal Mining ,Ministry of Education ,Anhui University of Science and Technology, Huainan 232001 ,China

会议类型: 国际会议

会议名称: International Mining Conference 2014(2014国际采矿论坛)

会议地点: 安徽淮南

会议语种:英文

页码: 417-421

在线出版日期: 2014-09-19（万方平台首次上网日期，不代表论文的发表时间）