Theoretic seepage model of "water-rock-structural plane" considering the hydro-mechanical coupling mechanism

This paper analyzed the coupling mechanism between stress and seepage in the fractured rock, especially considering the hydrostatic pressure and hydrodynamic pressure on the rock surface. Moreover, the JRC-JMC parameters have been incorporated in the model through the topographical method. Then a seepage model has been proposed, i.e. "water-rock-structural plane" model. This model can describe the seepage mechanism clearly and distinctly, even under 3D stresses. From the point of the deformation of the structural plane and the variation of the surface characteristic, the relation between permeability and the 3D stresses and the geometry of the rock surface has been derived. Then, the effective of the seepage model has been clarified deeply and it shows that the seepage model can be applied to the mine excavation and other engineering projects.