Yantian Yin

Abstract Fractured hydrothermally altered rock masses around roadway excavations are highly susceptible to repeated blasting disturbance, yet the transfer from specimen-scale cyclic degradation to engineering-scale contour deterioration remains insufficiently understood. To address this gap, this study establishes a cross-scale framework integrating repeated-impact SHPB testing, RHT constitutive calibration, multi-cycle LS-DYNA simulation, field vibration monitoring, and field assessment.

Abstract This study investigates the stability of deep granite roadways under cyclic loading and unloading, focusing on the energy evolution of surrounding rock in the Sanshandao Gold Mine. In-situ stress measurements between − 835 m and − 1140 m reveal a horizontally dominated tectonic stress field, with both maximum and minimum horizontal stresses increasing approximately linearly with depth.