巷道风流中瓦斯逆流机理及其实验研究

分析了井巷风流中瓦斯逆流现象及其特征，运用相似原理导出矿内紊流风流中瓦斯运移无量纲微分方程组和相似参数，通过实验得到倾斜共馘上行风流中巷道顶板瓦斯逆流、浓度分布及逆流区长度的变化规律，并得出倾斜巷道下行风发生瓦斯逆流的临界判别式。

THE MECHANISM AND TEST RESEARCH OF GAS ADVERSE CURRENT IN ROADWAY AIR FLOW

The phenomenon of gas adverse current and its features are analysed in roadway air flow.By use of analogy principle, non dimensional differential equation group and analogical parameters of gas movement are deduced in roadway turbulent flow. The variable law of gas adverse current and length of its area as well as concentration distribution near roadway roof are obtained in downstream incline roadway by experiments. Lastly, the critical discriminant of gas adverse current have been set up in downstream incline roadway.