Stability Evaluation and Structural Parameters Optimization of Stope Based on Area Bearing Theory

A reasonable and stable stope structure is the premise of realizing safe mining underground metal ore. To safely mine gently inclined medium-thick ore body, stability in Bainiuchang Mine was analyzed based on pillar area bearing theory, with regard to nine groups structural parameters numerically simulated. The results show that existing failed maintain requirements tended be exposed risk collapse. middle section as well roofs floors are vulnerable due tensile stress when by open stoping, compressive concentration prone occur at junction pillars, side walls, floors. Shear contributes little failure. stoping for body optimized using ANSYS numerical simulation: height 4.5 m, diameter 4 spacing 7 m row 8 m. onsite trial shows recovery rate reaches 82% under these parameters, which also realizes equilibrium safety economy.