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高位巷瓦斯抽采方法是解决采动卸压瓦斯涌出的有效途径。本文利用FLUENT软件进行采空区内瓦斯流动计算,通过数值分析,模拟了同煤矿区3种典型模型“U+I”、“U+Ⅱ”、“U+Ⅲ”通风方式下瓦斯治理效果。结果表明:在这些方式中的采空区瓦斯浓度变化曲线为“L”字形,靠近回风侧由于风流的作用及采动裂隙发育的原因使得瓦斯浓度比同水平的进风侧瓦斯浓度高,且越往深部,回风侧的瓦斯越高。这些为高位巷道抽采采空区卸压瓦斯的布置工艺和设计参数提供参考。
The method of gas drainage in the upper lane is an effective way to solve the problem of gas emission from the mining relief gas. In this paper, FLUENT software was used to calculate the gas flow in the goaf, and numerical simulation was used to simulate the ventilation of three typical models of “U + I”, “U + Ⅱ” and “U + Ⅲ” Way of gas treatment effect. The results show that the variation of gas concentration in the goafs is “L” -shaped in these ways, and the gas concentration near the return air side is higher than the gas level at the inlet side of the same level due to the effect of wind flow and the development of the mining fractures High, and the deeper, the higher the return air side of the gas. These provide reference for the layout process and design parameters of relief gas in goaf of high roadway.