Research on the Coupling Mechanism of Multi-Hazards and the "Five-in-One" Collaborative Prevention and Control Technology in the Syncline Axis Working Face

Abstract

The syncline axis area, influenced by the convergence of water in structurally low-lying zones, enhanced formation sealing properties, and the superimposed effects of stress concentration and mining disturbance, is prone to the co-enrichment and chain amplification of multiple hazards within the same region, including water disasters, fires, goaf hazards, and toxic and harmful gases such as gas and hydrogen sulfide. Based on the 9401 working face of Hengsheng Coal Industry, this study integrates structural control, mining-induced fracture evolution, and the reconstruction characteristics of seepage and ventilation flow fields to reveal the coupling mechanism of multi-hazards in the syncline axis. A "Five-in-One" closed-loop collaborative prevention and control system, encompassing "Prediction-Early Warning-Precontrol-Prevention and Control-Collaboration," has been established. Field applications demonstrate that during the mining process through the syncline axis, the gas environment in the goaf remained stable, water inflow was relatively low, and the impact of toxic and harmful gases was minimal, ensuring safe extraction in the complex section of the syncline axis.