Study on Optimization of Stope Structural Parameters and Filling Scheme of Wawu Phosphate Mine in Yichang City, China

Reasonable stope structural parameters are very important to ensure the safety and efficiency of mining. In this paper, based on elastic-plastic constitutive model Mohr-Coulomb strength criterion, reasonable span critical calculated by using simply supported beam theory mine room width calculation formula. PLAXIS2D finite element analysis software was used conduct numerical simulation research 7 m × 9 m, 5 12 structure parameter schemes 9m, waste rock filling schemes. The optimal were determined displacement variation rule, surrounding stress distribution plastic zone. results show that Case 1 one-time mining 3 zone is connected, not convergent, unstable. 2 4 change stress, in goaf under two cases compared, finally obtained can improve economy area, verify feasibility implementing system verified.