Thermal-hydraulic-mechanical coupling mechanical behavior and acoustic emission characteristics of deep sandstone

Based on the deep in situ mining environments with ?three high?, a triaxial compression experiment of water-saturated sandstone under conditions 150?C, 110 MPa confining stress and 105 pore water was carried out. The results show that creep deformation stage produces surge acoustic emission energy when radial changes from expansion to rapid compression, is sheared by single crack it damaged. From monitoring analysis, thermal-hydraulic-mechanical (THM) coupling environment will cause irreversible internal distribution, structure mineral framework sandstone. In THM experiment, impact rock sample due long-term simulation "three high" difference caused final experimental should be considered.