塔山矿综放工作面瓦斯涌出规律研究

Study on gas emission law of fully mechanized working face in Tashan Mine

本文针对塔山煤矿8214综放工作面瓦斯分布情况进行了现场测定,得出了瓦斯浓度分布曲线;计算了回采期间煤壁、采落煤及采空区瓦斯涌出所占比例,并通过数值模拟分析了地面钻孔抽采对采空区瓦斯分布的影响。经测算回采期间该工作面瓦斯涌出煤壁占3.19%、采落煤占39.93%、采空区占56.88%。结果表明,通过采用地面瓦斯抽采能有效减少采空区瓦斯向工作面的涌出。

In this paper, the gas distribution of 8214 fully mechanized working face in Tashan Coal Mine is measured, the gas concentration distribution curve is obtained; The gas emission proportions of coal wall, mined coal and goaf in the mining period are calculated, and the influence of the ground drilling on the goaf gas distribution is analyzed by the numerical simulation. It is measured that the gas emission of the working face in the mining period is that the coal wall, the mined coal and the goaf are accounted for 3.19%, 39.93%, 56.88% respectively. The results show that the ground gas extraction can effectively reduce the emission of gas from the goaf to the working face.