Research on the prevention of coal bumping tendency in mining extremely thick coal seam

Abstract：Based on the study of extremely thick coal seam with coal bumping tendency in Qianqiu coal mine, characters and influence factors of coal bumping are recognized.Suitable forecasting measures, preventing measures, examining methods for preventing measures, and effectiveness and crashing measures that can be put into effect once above measures all failed are put forward.The safety system of extremely thick coal seam is built and the extremely thick coal seam with coal bumping tendency in Qianqiu coal mine is extracted smoothly with fully mechanized sub-level caving mining technology.It can be the successful example for extracting extremely thick coal seam with coal bumping tendency.

Keyword：coal bumping;extremely thick coal seam;safe extraction;