LAUSR

Abstract In this article, a series of laboratory experiments are carried out to investigate the coupled hydro-mechanical failure, energy and permeability of fissured rock-like specimens under the triaxial compression. Effects of internal seepage pressure p w , confining pressure σ 3 and inclination angle α on the crack initiation and propagation thresholds, deformation characteristics, ultimate 3-D fracture networks, permeability evolution characteristics and energy evolution characteristics during the coupled hydro-mechanical progressive failure processes of fissured rock-like specimens. Subsequently, the coupling hydro-mechanical failure mechanism is revealed based on the present results. These experimental results and coupling hydro-mechanical failure mechanism provide deep understanding to scientists and engineers for monitoring and controlling rock stability in the geological engineering projects in the coupling seepage-stress environments.