节理岩体的渗透系数与应变、应力的关系

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。

Coupling relationship of percolation coefficient of fractured rock masses to strain and stress

According to the empirical formulas of the seepage flow experiments in fracture and mechanical constitutive relations, using the concept of mechanical aperture,the coupling relationship of the equivalent coefficient of percolation to complex strain has been derived concerned with rock masses which have one or more than one set of joint. The formulas show that the equivalent coefficient of percolation of fissured rock is the function of complex strain and depends upon crack geometric characteristics, mechanical strenggth, interval between fissure, mechanic aperture, stress, loading and unloading conditions. The results of- fer a new detection for mechanic-percolating interaction of complex rochmass under the condition of complex strain.