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为了解决寺家庄矿顺层钻孔预抽煤巷条带瓦斯措施预抽末期抽采量下降幅度大,消突周期过长的问题,分析了造成该现象的原因,采用压风注气配合顺层钻孔预抽煤巷条带瓦斯技术,在寺家庄矿15108进风顺槽进行试验,结果表明,预抽末期压风注入0.5 MPa的气体可以使平均预抽纯量维持在1.07 m3/min,单孔的抽采纯量提高2～38.6倍;平行层理方向比垂直层理方向注气见效快,渗透率不同是导致该差异性的原因。
In order to solve the problem that the draining amount of the gas drainage pre-pumping in the pre-pumping tunnel of pre-pumping coal roadway along the strata of the Shijiazhuang Mine is large and the elimination period is too long, the reason of this phenomenon is analyzed. Layer borehole pre-pumping technology with laneway gas in the tunnel at Si Jia Zhuang 15108 inlet test, the results show that the end of pre-pumping pressure of 0.5 MPa pressurized gas can make the average pre-purge volume maintained at 1.07 m3 / min , The volume of single-hole extraction increased 2 ~ 38.6 times; parallel bedding direction gas injection faster than the vertical bedding direction, permeability is the cause of the difference caused by the difference.