Study on Occurrence Mechanism and Prevention Technology of Rock Burst in Narrow Coal Pillar Working Face under Large Mining Depth

This paper presents a collaborative control scheme involving “unloading-solidifying” to prevent rock bursts during narrow pillar recovery at large mining depths. In this study, the stress distribution rule of coal mass excavation and process is studied, energy accumulation characteristics overlying hard thick roof structure are investigated. way, burst inducing mechanism working face under complex conditions The results show that peak lateral bearing pressure goaf maximum horizontal principal provide static load condition for occurrence roadway excavation. Affected by superposition “near-field high + far-field dynamic load”, it extremely easy reach critical destabilization value period face. According monitoring results, developed coordinated scheme, which focuses on strong relief support in near-field high-bearing high-level with an advanced pre-cracking roof, can effectively avoid accidents