Abstract
To elucidate the impact of mine water on weakening mechanisms of coal under dynamic compressive loading conditions, this investigation employed experimental analyses utilizing Split Hopkinson Pressure Bar (SHPB) apparatus. Parameters including moisture content, impact gas pressure, and confining pressure were systematically varied to clarify the weakening properties. The results indicate a significant decrease in both the strength and stiffness of submerged coal under dynamic loading conditions. Furthermore, moisture infiltration accelerated strength degradation. A damage model is derived based on elastic damage mechanics. The model demonstrated strong concordance with the experimental data through parameter testing. This research provides quantitative evidence for the comprehension of the weakening mechanism of submerged coal.