祁东矿346抽放巷水力压裂技术研究

Study on Hydraulic Fracturing Technology of 346 Roadway in Qidong Coal Mine

针对祁东矿3煤进行水力压裂现场试验,采用多种判断指标和数值模拟相结合的方法,得出瓦斯排量达到42.52 m3,瓦斯浓度平均降低30%;工作面前方煤体的集中应力带向煤体深处推移,卸压区域加大到1.5 m,降低了煤与瓦斯突出的危险性,达到了消突的效果。

Aiming at the field test of hydraulic fracturing in Qidong coal mine,a variety of judging indexes and numerical simulation methods are used, the results show that the gas concentration in front of the working face is reduced by 42.52 m3, and the gas concentration is reduced by 30% on the average. The concentrated stress zone of the coal body in front of the working face is moved to the depth of the coal body, and the pressure relief area is increased to 1.5 m, which reduces the danger of coal and gas outburst and achieves the effect of eliminating outburst.