CAJ | 학술논문

针对糯东煤矿“三软”高瓦斯低透气性煤层易流变、难抽采的问题，提出了底板巷道穿层水力冲孔卸压增透技术，并在糯东煤矿11702掘进工作面进行了现场试验。结果表明：冲孔后比冲孔前抽采瓦斯浓度上升3．4倍，瓦斯抽采流量增加4．4倍，炮掘工作面回风流中的瓦斯（体积分数）由冲孔前0．8％的超限预警状态变成冲孔后的0．4％的安全范围，水力冲孔技术应用效果显著，在糯东煤矿取得了良好的卸压增透效果。
침대나동매광“삼연”고와사저투기성매층역류변、난추채적문제，제출료저판항도천층수력충공사압증투기술，병재나동매광11702굴진공작면진행료현장시험。결과표명：충공후비충공전추채와사농도상승3．4배，와사추채류량증가4．4배，포굴공작면회풍류중적와사（체적분수）유충공전0．8％적초한예경상태변성충공후적0．4％적안전범위，수력충공기술응용효과현저，재나동매광취득료량호적사압증투효과。
To solve the problem of easy rheology and hard drainage in"three soft"coal seam with high gas concentration and low permeability in Nuodong coal mine,the pressure releasing and permeability improving technology with hydraulic flushing in floor gateway was proposed,and corresponding field test at the No.11702 heading face of Nuodong coal mine was carried out.The re-sults show that the drained gas concentration after hydraulic flushing is 3.4 times as that without hydraulic flushing and the gas flow rate is increased by 4.4 times;and the gas concentration at the blasting working face changes from 0.8% (overrun warning state,before hydraulic flushing)to 0.4% (safety state,after hydraulic flushing).The application of hydraulic flushing technolo-gy is more effective and remarkable in releasing pressure and improving permeability in Nuodong coal mine.