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进一步分析了第I部分中提出的岩石细观统计渗流模型[1]。讨论了由细观统计渗流模型得到岩石宏观渗透系数的方法。为了利用细观统计渗流模型对岩石损伤破坏过程中的渗透性演化进行分析,引入了各向异性损伤模型,用以对岩石的细观损伤和裂纹的扩展过程进行力学分析,并讨论了细观统计渗流模型与各向异性损伤模型的联合分析方法。对Lac du Bonnet花岗岩损伤过程中的渗透性演化进行了计算分析和验证。结果表明,细观统计渗流模型可以较精确地描述裂纹充分贯通前岩石渗透性的演化。
Further analysis of the rock meso-statistical seepage model proposed in Part I [1]. The method of obtaining the macroscopic permeability coefficient of rock from the mesoscopic seepage model is discussed. In order to analyze the permeability evolution in the process of rock damage and destruction by using the meso-statistical seepage model, an anisotropic damage model is introduced to analyze the meso-damage of rock and the crack growth process. A Joint Analysis Method of Statistical Percolation Model and Anisotropic Damage Model. The permeability evolution of Lac du Bonnet granite during damage was calculated and verified. The results show that the mesoscopic statistical seepage model can describe the evolution of rock permeability well before the fracture is fully penetrated.