工作面沿空留巷Y型通风条件下瓦斯治理技术

Gas Control Technology for Gob Side Entry Retaining in Working Face under Y-type Ventilation

为解决大阳煤矿3405工作面回采期间瓦斯含量高的问题,根据沿空留巷Y型通风的具体特征,确定采用本煤层钻孔抽采+高位钻孔抽采+沿空留巷柔模埋管抽采相结合的瓦斯抽采方式。结果表明:抽采方案实施后,工作面、上隅角及回风巷内的瓦斯均稳定在0.7%以下,瓦斯治理效果显著。

In order to solve the problem of high gas content in 3405 working face of Dayang Coal Mine,according to the specific characteristics of Y-type ventilation in gob side entry retaining,the combination of borehole drainage,high-level borehole drainage and flexible formwork buried pipe drainage in gob side entry retaining is adopted.The results show that:after the implementation of the drainage scheme,the gas in the working face,upper corner and return air roadway is stable below 0.7%,and the gas control effect is remarkable.