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为研究煤的吸附作用对瓦斯渗流特性的影响,以贵州六盘水矿区的煤样为研究对象,进行了瓦斯吸附平衡前后和不同吸附气体的三轴渗流试验。试验表明,相同煤样在瓦斯吸附平衡后渗透率明显低于吸附平衡前的渗透率;相同煤样通过不同气体的渗透率具有KHe>KCH4>KCO2的规律,不同吸附气体煤样的渗透率与气体压力服从指数分布;煤体渗透率与煤的变质程度具有一定的相关性。
In order to study the influence of coal adsorption on gas seepage characteristics, a coal sample from Liupanshui mining area in Guizhou Province was taken as the research object to conduct the triaxial seepage test before and after gas adsorption equilibrium and different adsorbed gases. The results show that the permeability of the same coal sample after gas adsorption equilibrium is obviously lower than that before adsorption equilibrium. The permeability of the same coal samples with different gases has the rule of KHe> KCH4> KCO2. The permeability of coal samples with different adsorption gases is related to The gas pressure obeys exponential distribution; the permeability of coal has a certain correlation with the degree of coal metamorphism.