关键词: 运输下山, 石门揭煤, 瓦斯抽采, 水力冲孔, 煤体固化

Abstract: in order to prevent coal and gas outburst accidents in the process of uncovering coal at crosscut, the geological conditions and gas occurrence status of No.11 Coal Seam at - 950 level in Donghuantuo Coal Mine are analyzed, and comprehensive gas control technologies such as gas parameter measuring point, gas pre extraction, hydraulic punching and coal solidification are proposed. The results show that,Through the comprehensive gas prevention and control technology of cross cut coal uncovering, the gas content of the coal uncovering point and its surrounding coal seam is reduced to 3.19m3/t, and the gas pressure is reduced to below 0.6MPa. The regular circulation is ensured every day, and the safe coal uncovering is realized successfully.