综采工作面瓦斯涌出规律研究

Study on Gas Emission Law in Fully Mechanized Mining Face

文中对综采工作面回采期间瓦斯浓度沿着走向方向以及倾向方向分布情况进行研究,并探讨了回风巷上隅角瓦斯浓度与回采面产量预计配风量关系、回采面瓦斯浓度分布与回采面周期来压关系,结果表明:倾向上瓦斯浓度在接近回风巷30m位置增加明显,走向沿着煤壁-回采空间-采空区瓦斯浓度分布呈现出高-低-高的分布特征;工作面回风巷上隅角瓦斯浓度随着工作面产量以及配风量的增加,总体呈现出增高的趋势;工作面周期来压期间瓦斯浓度明显增加,较平时浓度增加幅度在50%左右。

In this paper, the distribution of gas concentration along roadway direction and inclined direction in fully mechanized mining face during mining is studied, and the relationship between gas concentration in upper corner of air return roadway and predicted air distribution volume of production in mining face, and the relationship between gas concentration distribution in mining face and periodic weighting of mining face are discussed. The results show that the gas concentration in the inclined direction increases obviously near the 30m position of the return air roadway, and the gas concentration distribution along the direction of the roadway along the coal Wall-mining space-goaf presents the characteristics of highlow- high distribution, as well as the gas concentration in the upper corner of the return air roadway increases with the increase of the output and air distribution of the working face, and the gas concentration increases obviously during the period of periodic weighting, which is about 50% higher than the normal concentration.