针对本煤层瓦斯抽采钻孔周边裂隙多、注浆效果差、抽采浓度低等问题,对注浆封孔机理及注浆液性能进行了分析,并通过13125本煤层钻孔注浆材料配比优化试验,得出高水材料注浆时间为水泥浆液单孔注浆时间的65%;高水注浆材料单孔成本最高仅为水泥注浆单孔成本的79%;高水材料注浆效果优于水泥注浆效果,最佳注浆配比为水料比9∶1。 Aiming at the problems such as many fractures around coal seam gas drainage borehole, poor grouting effect and low pumping concentration, the grouting sealing mechanism and performance of grouting fluid are analyzed, and 13,125 coal seam grouting material The results showed that the grouting time of high water material was 65% of the single grouting time of cement grout; the single hole cost of high water grouting material was only 79% of the single grouting cost of cement grouting; The effect is better than the cement grouting effect, the best ratio of grouting water to material ratio of 9: 1.