高低位裂隙带钻孔抽放瓦斯技术在麦捷煤矿的实践应用

Practical Application of Gas Drainage Technology by High-level and Low-level Borehole in Fracture Zone in Maijie Coal Mine

为了解决因“U”型通风方式导致的采空区瓦斯在上隅角积聚的问题,针对150502工作面,在计算瓦斯抽排能力的基础上,设计高低位裂隙带钻孔来抽放采空区的瓦斯。现场效果显示,该技术可有效降低瓦斯含量和浓度,提高瓦斯抽放利用率。

In order to solve the problem of gas accumulation in the upper corner of goaf caused by"U"ventilation mode,based on the calculation of gas drainage capacity of 150502 working face,this paper designed the high-level and low-level boreholes in fracture zone boreholes to drain gas from goaf.The field effect showed that the technology could effectively reduce the gas content and concentration and improve the drainage and utilization rate of gas.