胡家河煤矿首采工作面瓦斯运移规律及治理技术研究

Study on the gas migration law and treatment technology of the first mining face in Hujiahe coal mine

为了研究胡家河矿首采工作面瓦斯赋存和运移规律,采用现场实测及数值模拟的手段进行分析研究;并对首采工作面瓦斯抽采方案进行了优化。研究表明：4#煤瓦斯随深度增加而增大,且满足关系式：W=0.104H＋1.2797;随着工作面推采,采空区顶板出现大面积高渗高流区域,瓦斯抽采范围处于顶板上13~20 m,钻孔合理间距为5 m,优化后的瓦斯抽采方案效果良好。

In order to study the gas occurrence regularity and migration law,the field measurement and numerical simulation was used and the gas extraction scheme was optimized. The results show that the gas content of 4~#coal seam increases with the increase of buried depth and satisfies the relationship of W = 0. 104 H ＋ 1. 2797,with the mining of working face,large area high permeability area is emerged in goaf roof,the range of gas extraction is 13 ~ 20 m above the roof,and the reasonable distance of boreholes is 5m,and the optimized gas extraction scheme has good effect.