Study on Zonal Cooperative Control Technology of Surrounding Rock of Super Large Section Soft Rock Chamber Group Connected by Deep Vertical Shaft

Aiming at solving the problem of asymmetric deformation, failure, and stability control surrounding rock caused by excavation deep super large section soft chamber group passing through multilayer strata, taking connected vertical shaft in Wuyang Coal Mine as engineering background, deformation development mode rock, expansion situation loosening range, plastic failure response characteristics under disturbance influence are monitored numerically analyzed. On this basis, is divided into four maintenance areas: area I (severe area), II (stable III (medium IV (small mechanism The specific support technologies on effect systematically studied, including high-strength prestressed bolt (cable) mesh shotcreting coupling technology, reinforced concrete wall subarea brickwork hollow grouting reinforcement technology fragmented coal mass. basic ideas technical methods formed. collaborative “high-strength + mass” proposed. field application shows that realizes effective group.