Study on mechanical properties and acoustic emission response of deep granite under hydro-mechanical coupling

The study on the mechanical response of deep rock under hydromechanical couplings condition can guide safe excavation and stability evaluation tunnel engineering. effects monotonic loading cyclic properties granite 5 MPa pore water pressure 10 confining were studied by laboratory tests. Before peak stress, permeability was significantly higher than that loading, increased sharply after stress. There two active periods acoustic emission energy before stress but it always in relative quiet period Based theory, evolution discussed. dissipation better reflect effect mode evolution.