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根据岩体裂隙渗流实验成果，采用机械隙宽的概念并根据节理岩体的力学本构关系，导出了含一组或多组节理的岩体的等效渗透系数与复杂应变的耦合关系式，以一组节理为例，以 Ｚ为法线的节理等效渗透系数为：ｋｚ＝ｋ０ｚＤｉ（Ａｚεｚ＋１，（ｃτｚ·）２（式中Ａｚ、Ｃτｚ为εｚ、γｘｙ、γｙｚ的耦合作用系数，Ｄｉ、ｎｉ为与应力、应变有关的修正系数）。公式说明节理岩体的等效渗透系数是复杂应变的函数，并且受裂隙面几何形态、节理面力学参数、间距、隙宽、应力加载和卸载条件的影响，是复杂岩基在复杂应变条件下考虑力学－渗流耦合关系的一种新的探索。
According to experimental results of rock mass fissure seepage, based on the concept of mechanical gap and the mechanical constitutive relation of jointed rock mass, the coupling relation between equivalent permeability coefficient and complex strain of rock mass containing one or more groups of joints is deduced. Taking a set of joints as an example, the equivalent permeability coefficient of a joint normalized by Z is: kz = k0zDi (Azεz + 1, (cτz)) 2 where Az and Cτz are the coupling coefficients of εz, γxy and γyz, ni is the correction factor related to stress and strain.) Formula shows that the equivalent permeability coefficient of jointed rock mass is a function of complex strain, and is affected by the geometry of fracture surface, mechanical parameters of joint surface, spacing, gap width, stress loading and unloading conditions , Which is a new exploration for the complex rock foundation to consider the coupling of mechanics and seepage under complex strain conditions.