Degradation of Mechanical Properties and Micro-Scale Damage Mechanisms of Mudstone-Type Soft Rock Under Hydro-Mechanical Coupling: A Case Study of the Baoshishan Tunnel, Western Yunnan
Hydro-mechanical coupling governs the stability of tunnel surrounding rock in soft-rock strata. Mudstone-type soft rocks exhibit abrupt strength loss and time-dependent large deformation under groundwater infiltration, posing severe threats to construction safety and long-term service performance. Most existing studies...