An innovative method is proposed to prepare artificial columnar jointed rock masses (CJRM) with different columnar dip angles, and laboratory physical model tests are conducted to investigate anisotropic permeability and porosity characteristics of the prepared artificial CJRM. In the physical model experiment, permeability and porosity of artificial CJRM with different columnar dip angles is measured during three times cyclic loading and unloading of confinement pressure. Based on the results of the laboratory model tests, the Equivalent Continuum Media Model was applied to analyse anisotropic permeability of CJRM. The main conclusions are summarized as follows. In the first loading phase of confinement pressure, the impacts of confinement pressure on the anisotropic permeability of artificial CJRM, porosity, and the major and minor principle permeability coefficients (PPCs) are significant, while in the following stages of confinement pressure loading and unloading, the change of them is small, with stable value. Permeability of artificial CJRM gradually increases with rise of columnar dip angle, and the permeability anisotropy of artificial CJRM under low confinement pressure is higher than that under low confinement pressure.

中文翻译：

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考虑不同围压加载压力的CJRM各向异性渗透率和孔隙率研究

提出了一种新颖的方法来制备具有不同柱状倾角的人工柱状节理岩体（CJRM），并进行了实验室物理模型测试，以研究所制备的人工CJRM的各向异性渗透率和孔隙度特征。在物理模型实验中，在三倍的约束压力循环加载和卸载过程中，测量了不同柱状倾角的人工CJRM的渗透率和孔隙率。根据实验室模型测试的结果，将等效连续介质模型应用于CJRM的各向异性渗透率分析。主要结论概括如下。在约束压力的第一个加载阶段，约束压力对人工CJRM各向异性渗透率，孔隙度，主要和次要渗透系数（PPCs）显着，而在围压加载和卸载的以下阶段，它们的变化很小，具有稳定的值。人工CJRM的渗透率随柱状倾角的增加而逐渐增加，在低围压下人工CJRM的渗透率各向异性高于在低围压下的渗透率各向异性。