Fire-fighting and Rapid Withdrawing Technology in End Mining and Withdrawing Period of Working Face

According to the occurrence conditions of coal seam in Jiangou Coal Mine, the mining conditions of the working face and the distribution of the surrounding goaf, the reasons for the abnormal phenomena such as high concentration CO disaster gas and H₂S gas in the +495 m B_3-6 retracement working face are analyzed. The +495 m B_1-2 retracement working face has learned the above lessons and adopted a series of fire prevention and rapid withdrawal techniques, including: intensively mining of top coal in the final mining stage, hoisting chamber and moving outside, double lane retreating and initiative fire-fighting measures to greatly improve the speed and safety factor of the retracement and shorten the retracement period to 18 days, which ensures the safe and smooth withdrawal of +495 m B_1-2 working face.