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以弹性力学和岩石力学为指导,利用基础梁理论推导出巷道周围垂直应力分布规律,沿垂直巷道方向分为卸压区、集中应力区(塑性应力区、弹性应力区)和原始应力区,利用理论计算和数值计算方法确定不同应力区宽度。根据应力对煤层渗透系数影响对达西定律进行修正,建立应力影响下的瓦斯运移模型,并得到该模型下的解析解。
Under the guidance of elasticity mechanics and rock mechanics, the vertical stress distribution around the roadway is deduced by using the basic beam theory. The direction of the vertical roadway is divided into pressure relief zone, concentrated stress zone (plastic stress zone, elastic stress zone) and original stress zone Theoretical calculation and numerical calculation method to determine the width of different stress zones. According to the influence of stress on the permeability coefficient of coal seam, Darcy’s law is revised, and the gas migration model under the influence of stress is established, and the analytical solution under the model is obtained.