急倾斜松软突出煤层打钻技术

摘要

In light of the problems such as soft coal, big dip angle, great ground stress, serious drill hole collapse, shallow depth, low ratio of hole forming of the seriously outburst hazardous faces No.57.2 face of Gan Jiaqiao Coal Mine, construction drilling tools and slag discharge method are selected and optimized to improve the drilling depth and increase the hole forming rate, so as to eliminate the outburst.%针对赶家桥煤矿5702严重突出危险工作面，煤层松软、倾角大、地应力紧张、钻孔施工垮孔严重、深度浅、成孔率低等难题，通过优选施工钻具和改进排渣方式，提高了钻进深度，成孔率大幅度提高，达到了消突的目的。