Stability analysis of rock fracture and support performance in steeply dipping ore deposits with massive mining stopes

In this paper, taking a mine in Xinjiang as the engineering background, through combination of physical simulation experiment, 3DEC numerical calculation, theoretical analysis and field monitoring, fracture evolution characteristics overlying strata its influence on stability support under unbalanced loading conditions are systematically studied. The results show that action gravity-dip effect, non-uniform filling gangue leads to typical cross-layer migration overburden caving shape roof bearing arch. unstable inclined masonry structure is formed middle upper areas, which prone rotation sliding instability, forming impact pressure. mining stress changes significantly due coal seam. lower strata, greater peak stress, smaller value goaf, change. amplitude instability probability increase with decrease working resistance support, friction between partial load support. Finally, prevention control measures crushing steeply dipping large height face put forward.