TY - JOUR
TI - Thermal-hydraulic-mechanical coupling mechanical behavior and acoustic emission characteristics of deep sandstone
AU - Li Yi-Hang
AU - Xie He-Ping
AU - Zhang Ze-Tian
AU - Ling Wei-Qiang
AU - Gao Heng
AU - Zhang Ze-Tian
JN - Thermal Science
PY - 2023
VL - 27
IS - 1
SP - 553
EP - 560
PT - Article
AB - Based on the deep in situ mining environments with "three high", a triaxial  compression experiment of water-saturated sandstone under the conditions of  150°C, 110 MPa confining stress and 105 MPa pore water stress was carried  out. The results show that the creep deformation stage produces a surge in  acoustic emission energy when the radial deformation of sandstone changes  from expansion to rapid compression, and the sandstone is sheared by a  single crack when it is damaged. From deformation monitoring and acoustic  emission energy analysis, the thermal-hydraulic-mechanical (THM) coupling  environment will cause irreversible changes to the internal stress  distribution, pore structure and mineral framework of sandstone. In the THM  coupling experiment, the irreversible impact of the rock sample due to the  long-term simulation of the "three high" environment and the difference  caused by the impact on the final experimental results should be considered.