Theoretic research on seepage model of “water-rock-structural plane” under 3D stresses

This paper differentiated and analyzed the coupling mechanism of stress and fluid flow in fractured rock mass. It pointed out that the structural plane between the water and the rock mass is not only a physical medium in the process of water-rock coupling, but also a mechanical medium. 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 structural plane deformation, the relation between permeability and the 3D stresses has been derived, k = k₀ (1-σ_e/E)², and also the effective of the seepage model has been clarified deeply.