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.