CHINA MINE ENGINEERING

This paper takes a mine in Guizhou as an example, the combined gas drainage technology of coal seam group mining in outburst mine is analyzed, the combined gas drainage technology is formed according to the actual geological conditions of the mine. After field application, the comprehensive extraction rate of coal seam gas can reach more than 50%, and the gas in the air return roadway and upper corner of the working face is within the safe range.