In order to ensure the smooth mining of the middle roadway of the 21212 working face in Dongpang Mine, the gas extraction effect of the hydraulic punching drill holes under four different coal output conditions was tested in the No.2 coal seam of the 21212 roadway and compared with that of the ordinary holes. The maximum pure gas extraction amount was 0.59, 0.38, 0.36 and 0.29 m3/min for 3 months. Compared with the drilled holes, the decay of the pure amount of gas extraction in the first month was slower. The results showed that the hydro-punching drilling can significantly improve the gas extraction effect compared with ordinary drilling.
李晓绅. 东庞矿2号煤穿层水力冲孔瓦斯抽采研究[J]. 煤炭与化工, 2020, 43(10): 115-118.
Li Xiaoshen. Study on the extraction of gas from Dongpang Mine No.2 coal seam hydraulic flushing. CCI, 2020, 43(10): 115-118.