<p>Investigating the multi-axial stress states of coal under deep mining conditions and the disaster-inducing mechanisms associated with coupled static-dynamic disturbances is crucial for preventing catastrophic incidents in underground coal mines. To elucidate the dynamic strength and energy dissipation behavior of coal under combined static-dynamic loading, we performed systematic experiments using a true triaxial Hopkinson bar system across uniaxial, biaxial, and triaxial configurations. The results demonstrate significant pre-applied static load dependence of coal's dynamic strength: Under dynamic uniaxial compression (UC), strength progressively decreases with increasing pre-applied static load. During dynamic biaxial compression (BC), pronounced strength attenuation occurs along non-principal stress directions under elevated pre-applied static loads, while increased deviatoric stress triggers abrupt strength reduction. Triaxial compression (TC) enhances strength through fracture compaction, but intermediate principal stress exceeding the 6&#xa0;MPa critical threshold induces strength degradation. Increasing stress dimensionality progressively reduces impact wave energy reflectivity from 59.6% (uniaxial) to 33.6% (triaxial), while elevating absorption from 38.3 to 48.6%, with transmissivity stabilizing at 20.6%. Concurrently, energy dissipation density and dynamic strength exhibit loading-configuration-dependent correlations: Under both uniaxial and triaxial conditions, a positive correlation prevails along principal stress orientations versus a negative correlation in non-principal directions. Non-equibiaxial loading induces synchronized degradation of strength and energy dissipation capacity, whereas equibiaxial loading manifests anomalous strength enhancement with concomitant suppression of energy dissipation. The findings lay a theoretical foundation for the prevention and control of dynamic hazards in underground mining.</p>