立体交叉钻孔强化预抽煤层瓦斯技术研究

Technical Research on Stereo Cross Drilling to Strengthen Predrainage Coal Seam Gas

针对王坡煤矿3212工作面瓦斯含量较高的实际情况,利用立体交叉钻孔进行了强化预抽煤层瓦斯现场试验,并对工作面抽采钻孔布孔均匀程度以及工作面首采0~770 m瓦斯抽采达标情况进行了评价分析。结果表明:立体交叉钻孔强化预抽煤层瓦斯在3212工作面取得了良好的瓦斯抽采效果,是煤与瓦斯突出矿井有效的消突方法之一。

Aiming at the actual situation of high gas content in 3212 working face of Wangpo coal mine, the stereo cross drilling was used to strengthen the pre-drainage gas. The drilling hole uniformity degree and the condition of 0~770 m gas extraction in the working face were evaluated and analyzed.The results show that the stereo cross drilling to pre-drainage coal seam has achieved good gas extraction effect in the 3212 working face, which is one of the effective methods to eliminate coal and gas outburst.