Saturation Effects on Disc Cutting of Sandstone


A developing concrete material named CEM1 is thought to be a potential candidate as artificial seal for the underground storage for nuclear wastes. Noticing that the concrete always subjected to various destructive hydraulic and mechanical loading, an experimental research focused on the shear fracture of CEM1 under hydro-mechanical coupling was performed by using a pre-designed experimental set-up. Four series tests were carried out respectively to determine the closure of the shear fracture under different confining pressure; the effect of confining pressure on the ultimate shear capacities of the fracture; the effect of confining pressure combined interstitial pressure on the ultimate shear stress of the fracture; the influence of the relation between the hydraulic flow rate and the injection pressure on the fracture. The research results show that the fracture is closed primarily between 0 and 5MPa; the ultimate shear stress of the shear fracture is 12.1MPa under confining pressure of 5MPa, and it increases with the augmentation of the confining pressure; the confining pressure tightens the fracture and generates a diminution of permeability in material.

Meeting Name

45th US Rock Mechanics / Geomechanics Symposium


Geosciences and Geological and Petroleum Engineering


American Rock Mechanics Association (ARMA)

Document Type

Article - Conference proceedings

Document Version


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