An equivalent seepage resistance model with seepage-stress coupling for fractured rock mass

Seepage characteristics of regional principal fratured rock mass are studied with the effect of stress. Using parallel plate model, elastic mechanics and electronics in single fracture, a new conception of equivalent seepage resistance is put forward. On the basis of the geometric construction of regional principal fracture, an equivalent seepage resistance model with seepage-stress coupling is established. With the model the relationships between equivalent seepage resistance, permeability and stress are obtained, which is helpful to the stress-seepage coupling characteristics of regional principal fractures in rock mass. Combining a case study with the model, the seepage laws of the herring-bone combined fracture are researched. Through further detail partition and consideration, this model can be used to study fracture seepage evolution law affected by in-situ stress in rock mass containing regional principal fracture.