近水平顺层瓦斯抽放钻孔封孔工艺研究

Study Sealing Pore Technique of Nearly Horizontal Gas Drainage Hole In-seam

通过对影响钻孔封孔效果的因素的分析,提出了"偏心钻孔-加压注浆"综合封孔工艺,并在永红煤矿进行了实践,对其效果进行了长期考察对比,验证该工艺的合理性,提高了矿井瓦斯抽采浓度。

Through analyzing the influencing factors of hole sealing effect, puts forward the 'eccentric drilling-pressure grouting' sealing pore technique, and practices in Yonghong coal mine, investigates and contrasts its effect, and verifies its reasonableness, improves the gas concentration in the drainaging pipelines.