浅析煤层瓦斯单向流动理论的应用

Discussion on the application of one-way flowing theory about gas flow in coal seam

通过分析煤层渗透率与煤层有效应力的关系,建立煤层渗透率为变量时煤壁瓦斯单向流动数学模型,推导出煤壁瓦斯涌出量方程式。并以某矿为例,建立煤壁瓦斯涌出量与有效应力、暴露时间的关系并做曲线图,结果表明,以渗透率为变量进行煤层瓦斯流动研究更符合现场实际。

By analyzing the relation of rate of coal permeation and effective stress,connecting the continuity equation of gas flow,equation of motion,gas equation of state and gas content equation,the paper built the mathematic model of one-way gas flowing in coal seam,deduced the equation of gas emission in coal wall.For an example,the relation between gas emission and effective stress and the time of exposure were built and the curve diagram was drawn.The result indicates that it is more consistent with the actual studying gas flow using the variable rate of coal permeation.