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根据实验室粘土岩非饱和渗流实验的结果,将考虑塑性应变硬化、Hoek-Brown 和 Mohr-Coulomb 3种非饱和渗流应力耦合模型应用于模拟某粘土岩竖井,研究了粘土岩在开挖、通风、衬砌支护及长期运营期,围岩内渗流从初始饱和→非饱和→近饱和的过程以及地应力和水力学参数(Biot 系数、饱和度与毛细孔隙水压力关系、水相的相对渗透系数与饱和度关系)对围岩内的非饱和流动区域大小的影响.计算结果表明,水力学参数对非饱和渗流的影响区域非常显著,尤其是对水相的相对渗透系数与饱和度的关系的影响。
According to the results of unsaturated seepage experiment in laboratory clay, plastic strain hardening, Hoek-Brown and Mohr-Coulomb three kinds of unsaturated seepage stress coupled models are applied to simulate a clay rock shaft. The effects of clay rock on excavation, , Lining support and long-term operation period, the seepage flow in the surrounding rock changes from the initial saturation → unsaturated → near-saturation process and the relationship between the geostress and hydraulic parameters (Biot coefficient, saturation and capillary pore water pressure, relative permeability coefficient And saturation) on the unsaturated flow area in the surrounding rock.The calculated results show that the influence of hydraulic parameters on the unsaturated seepage is very significant, especially for the relationship between the relative permeability coefficient and the saturation of the water phase influences.