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针对芦岭煤矿高瓦斯极松软强突出煤层中穿层钻孔施工存在问题,研究了穿层钻孔防喷孔工艺,通过采取“预抽卸压掩护,递进顺次施工”的工序,使用防喷孔装置、配套防喷抽采系统,采取孔内下筛管措施,有效地降低了喷孔强度、降低了喷孔超限发生的概率,杜绝了滞后喷孔现象和喷孔伤人事故的发生,并提高了穿层钻孔抽采效果。
Aiming at the existing problems in the construction of strata through borehole in the high gas, extremely soft and strong coal seam in Luling Mine, the process of piercing through the borehole in the borehole is studied. By adopting the procedure of “pre-extraction and pressure protection, progressive construction” , The use of anti-spouting hole device, supporting anti-spray drainage system, take the hole under the screen measures to effectively reduce the nozzle hole strength and reduce the probability of nozzle hole overrun, to eliminate the lag spray holes and spray hole injury The occurrence of accidents and the improvement of the drilling effect of the stratum drilling.