The equivalent permeability tensor is essential to the application of the equivalent porous media model in the numerical seepage simulation for fractured rock masses. In this paper, a revised solution of the equivalent permeability tensor is proposed to represent the influence of the fracture connectivity in discontinuous fractures. A correction coefficient is involved to reflect the com- plex seepage flow type through the rock bridge. This correction coefficient is back analyzed from single-hole packer tests, based on the Artificial Neural Network (ANN) back analysis and the Finite Element Method (FEM) seepage simulation. The limitation of this back analysis algorithm is that the number of single-hole packer tests should be equal or greater than the number of fracture sets, and three is the maximum number of the fracture sets. The proposed solution and the back analysis algorithm are applied in the permeability measurement and the seepage simulation for the Xiaowan arch dam foundation.

中文翻译：

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不连续断裂等效渗透率张量的修正解

等效渗透率张量对于等效多孔介质模型在裂隙岩体数值渗流模拟中的应用至关重要。在本文中，提出了等效渗透率张量的修正解，以表示不连续裂缝中裂缝连通性的影响。涉及校正系数以反映通过岩桥的复杂渗流类型。根据人工神经网络（ANN）反分析和有限元方法（FEM）渗流模拟，从单孔封隔器测试中反分析该校正系数。这种反分析算法的局限性在于，单孔封隔器测试的次数应等于或大于裂缝组的数量，并且裂缝组的最大数量为三个。