在法国研究出一种计算机程序,来模拟煤层中瓦斯的运动规律,通过现场和实验室对煤的透气性和扩散性做了试验,并提出一些表达式。影响透气性的因素有地层应力、瓦斯压力、煤体收缩情况。实验室证明煤层透气性与地层应力是一个双指数关系,即 K=(?)式中σ为基本的偏应力;α和β为随外应力变化煤层透气性变化率;A、 In France, a computer program was developed to simulate the movement of gas in the coal seam. The gas permeability and diffusivity of coal were tested on the site and in the laboratory and some expressions were proposed. Affect the permeability of the factors of formation stress, gas pressure, coal contraction. Laboratory proved that the permeability of coal seam and strata stress is a double exponential relationship, that is, K = (?) Where σ is the basic deviatoric stress; α and β are the permeability of coal seam permeability change rate; A,