多孔介质应力对孔隙压力影响的研究
THE EFFECT OF STRESS IN POROUS MEDIA ON PORE PRESSURE
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摘要: 通过大量的现场测试发现 ,含瓦斯煤岩是一个复杂的系统 ,煤体应力的变化是引起其他一系列变化的主导因素。随煤体应力的变化 ,孔隙压力呈指数形式变化 ;介质的渗透性受孔隙压力梯度的控制。Abstract: The purpose of this paper is to analyze the variation of pore pressure and flow amount of gas in the course of mining by a great deal of site tests. The result shows that the coalbed containing gas is a complex system. The key factor causing the system to change is the stress in coal bed. The pressure of gas increases exponentially with increasing stress in coal bed; and the gas seepage is controlled by gradient of gas pressure.