Creep acoustic emission characteristics and failure precursor identification of double-fissured red sandstone under freeze-thaw action.

ABSTRACT: Rock masses in cold regions deteriorate due to frost heave caused by fissure water, posing risks to engineering projects. This study investigates the long-term mechanical behavior of fully saturated fissured red sandstone under freeze-thaw conditions. Creep acoustic emission (AE) experiments were conducted to explore how freeze-thaw cycles and fissure dip angles influence rock creep and AE characteristics. Four freeze-thaw cycle levels (0, 30, 60, and 90) and three double-fissure orientations (15°-15°, 15°-75°, and 75°-75°) were examined in this study. Results show that: (1) Increasing freeze-thaw cycles lead to greater instantaneous and creep strains, higher AE signal amplitudes, exponential growth in AE energy rates, and faster b-value fluctuations. (2) With larger fissure dip angles, th

SUBMITTER: Yang D 

PROVIDER: S-EPMC12639030 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature