基于CFD采空区瓦斯埋管抽采技术数值模拟研究

Numerical Simulation on the Goaf Gas Buried Tube Extraction Technology based on CFD

在高瓦斯厚煤层的开采过程中,瓦斯危害已经影响到煤矿正常生产,其中采空区瓦斯危害是目前煤矿灾害防治的重点之一。以山西晋城寺河矿综采工作面的采空区为研究对象,在分析了寺河煤矿瓦斯抽采现状、工作面瓦斯涌出规律、采空区瓦斯涌出在工作面瓦斯涌出的占有比例、以及采空区埋管抽采瓦斯方法和抽采参数后,构建了该矿采空区瓦斯抽采数值模型,通过分析对比瓦斯运移分布规律模拟结果,得出了寺河煤矿采空区瓦斯埋管抽采技术参数,对提高寺河煤矿采空区瓦斯抽采效率有一定的指导意义。

Gas hazard has influenced the normal production of coal mine.Especially gas hazard in goaf is one of the key of mine disasters prevention and control currently in mining process of thick coal seam of high gas.Taken the fully mechanized coal face goaf of Sihe mine in Jin City of Shanxi province as the research object,goaf gas extraction numerical model of Sihe coal mine was constructed after analysis of gas extraction situation,gas emission law of working face,proportion of goaf gas emission to working face gas emission,extraction gas method of buried tube of goaf and extraction parameters.Through analysis and contrast the numerical results of gas migration distribution law,goaf gas buried tube extraction technology parameters of Sihe coal mine was obtained.It has a certain guiding significance for Sihe coal mine goaf gas extraction efficiency.