新安煤矿高位钻孔抽采采空区瓦斯效果分析

Effectiveness Evaluation of Gas Drainage from Goaf by High Roof Drilling in Xin′an Coal Mine

针对新安煤矿高位钻孔抽采采空区瓦斯的治理措施,基于采空区瓦斯运移、顶板岩层冒落规律,重点分析采空区瓦斯来源、涌出量以及瓦斯浓度分布特征,利用工作面推进期间煤层顶板上覆岩层卸压变形情况,通过布置钻孔抽采层位,高效、可控高浓度接替抽采采空区瓦斯,从而解决了工作面回风流、上隅角瓦斯超限和工作面瓦斯涌出异常的问题。

Aimed at the gas control measure on goaf which was taken by Xin＇an coal mine-high level borehole gas drainage, based on rule of goaf gas migration, the roof strata caving rule, selective analysis about goaf gas source, pouring amount and the characteristics of the gas concentration distribution, during the period of working face advancing,using the unloading deformation of overlying strata of roof, along the seam mining direction and in the roof rock construction of high level borehole drainage goaf gas, to solve the return current face, upper comer gas overrun and face the problem of abnormal gas emission.