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为了考察水力压裂卸压增透强化抽放快速消突的效果,以义马煤业集团新义矿11041高抽巷为试验点,通过考察水力压裂前后瓦斯抽放浓度变化以及注水压力、注水时间和注水量的关系,得出水力压裂技术提高抽放浓度和抽放量的效果明显。试验结果表明:单孔最高抽放浓度为53.2%,非压裂区的单孔抽放浓度最高为6.5%,压裂区的单孔最高抽放浓度是非压裂区单孔最高抽放浓度的8倍。另外,通过对21个抽放孔丽斯浓度进行的统计发现,21个孔前10d平均浓度为18.94%,是非压裂区的6倍。
In order to investigate the effect of hydraulic excavation and pressure intensification to enhance gas drainage and eliminate gas bubbles rapidly, aiming at the test point of 11041 high pumping tunnel in Xinyi Coal Mine of Yima Coal Group, the gas drainage concentration before and after hydraulic fracturing was investigated and the water injection pressure, water injection Time and the amount of water injection, drawn hydraulic fracturing technology to enhance drainage concentration and drainage effect is obvious. The experimental results show that the maximum discharge concentration of single hole is 53.2%, the maximum single-hole drainage concentration in non-fractured area is 6.5%, and the maximum single-hole discharge concentration in fracturing area is the maximum single-hole drainage concentration in non-fracturing area 8 times. In addition, through the statistics of 21 drainage hole Listeris concentration, the average concentration of the first 10 days in 21 holes was 18.94%, which was 6 times higher than that in the non-fracturing area.