“110”工法切顶留巷瓦斯治理技术研究

Research on Gas Control Technology of"110"Construction Method Cutting Roof and Retaining Roadway

采用“110”工法施工的高瓦斯矿井,在切顶留巷综采工作面回采过程中,存在瓦斯浓度较高的问题,严重影响煤矿的安全生产。瓦斯浓度高主要是邻近层瓦斯上涌、高位裂隙带钻孔抽采能力不足和采空区瓦斯涌出量增加等原因导致。在本煤层、邻近层和采空区裂隙带钻孔瓦斯治理后,在工作面回采过程中出现的各种问题都可能引起留巷墙体处的瓦斯事故。

In high gas mines constructed by"110"method,there is a problem of high gas concentration in the process of cutting the top and leaving the lane for comprehensive mining workings,which seriously affects the safe production of coal mines.The high gas concentration is mainly caused by the upwell of gas from neighboring seams,insufficient extraction capacity of high fissure zone boreholes and the increase of gas gushing from the mining area.In this coal seam,the neighboring layer and the fissure zone of the mining area after the gas management of the borehole gas,in the workface recovery process may cause the gas accident at the wall of the stay.