Abstract：The relationship among permeability，strain and stress of rock is discussed for both brittle and plastic fracture based on the permeability-strain curve and permeability-stress curve obtained from the permeability test under complete stress-strain path. The results of coupling behavior of permeability of rock with stress before peak pressure show that permeability-stress curves of various rock samples resemble each other in geometrical pattern，and correlativity between permeability and stress is obvious. A formula is proposed to show the behavior of permeability expressed with increasing of stress. In addition，a characteristic parameter of stress is proposed to indicate critical anti-permeability strength of rock which corresponds to the stress causing permeability strengthening distinctly. And an example of application of the characteristic parameter is also given to evaluate water-insulating capability.
4Jones F O. A laboratory study of the effects of confining pressure on fracture flow and storage capacity in carbonate rock[J]. Journal of Petrol Technology，1975，27(1)：21～27
2002, Vol. 21 
