采空区瓦斯涌出规律数值模拟及应用研究

Numerical Simulation and Application of Gas Emission Law in Goaf

通过建立三维数值模型,对综采面采空区及其上覆岩层内的瓦斯涌出规律进行模拟研究,并对斜沟矿18205综采面进行现场验证。研究结果表明:当采用回风巷及高抽巷同时抽排时,能够使得综采面采空区内的瓦斯向抽采口运移,从而降低瓦斯浓度,同时能够增加采空区漏风深入距离,减少瓦斯涌出量,对煤矿安全生产具有重要意义。

Through the establishment of three-dimensional numerical model to simulate the fully mechanized mining face goaf and overlying strata in the emission law, and the Shanxi xiegou Coal Mine 18205 fully mechanized face in on-site verification, the results show that when the gas tail roadway and high drainage roadway drainage at the same time, can make the fully mechanized mining face the gas in the region to the air pumping port transport, thereby reducing the concentration of gas, at the same time can increase the depth of gob gas emission reduction distance, is of great significance to the coal mine safety production.