Research and application of mining technology for deep well large dip angle upward mining working face crossing faults

This study addresses the issues of surrounding rock instability and equipment control encountered when a large-inclination upside-down mining face traverses a fault in a deep, high ground stress environment. It uses the case of a large-inclination upside-down mining face passing through a fault in a specific mine located in southwestern Shandong as the engineering context. The research analyzes the characteristics of dynamic stress distortion resulting from fault disturbance through FLAC^3D numerical simulations. A technical system is proposed that integrates stepped mining technology, advanced control of fault structures, and coordinated support of surrounding rocks. Field applications demonstrate that during fault passage, the resistance fluctuations of hydraulic supports remain controllable, effectively suppressing roof delamination and sliding while reducing coal wall damage. This provides a theoretical foundation and technical support for safe mining under deep and complex geological conditions.