TY - JOUR
TI - Study on mechanical properties and acoustic emission response of deep granite under hydro-mechanical coupling
AU - Hao Qi-Jun
AU - Zhang Zhao-Peng
AU - Wang Xin-Zhong
AU - Zhang Ru
AU - Zhang An-Lin
AU - Zhang Lan-Bin
AU - Lou Chen-Di
JN - Thermal Science
PY - 2023
VL - 27
IS - 1
SP - 631
EP - 638
PT - Article
AB - The study on the mechanical response of deep rock under hydromechanical  couplings condition can guide the safe excavation and stability evaluation  of deep tunnel engineering. The effects of monotonic loading and cyclic  loading on the mechanical properties of granite under 5 MPa pore water  pressure and 10 MPa confining pressure were studied by laboratory tests.  Before the peak stress, the permeability under monotonic loading was  significantly higher than that under cyclic loading, and the permeability  under cyclic loading increased sharply after the peak stress. There were two  active periods of the acoustic emission energy before peak stress under  monotonic loading, but it was always in relative quiet period under cyclic  loading before peak stress. Based on the energy theory, the energy evolution  of granite was discussed. The dissipation energy can better reflect the  effect of loading mode on the energy evolution.