Research on the Risk Assessment of Water Inrush From the Roof of the Fully Mechanized Mining Face in Huanglong Jurassic Coalfield

The frequent occurrence of water inrush disasters from the fissured aquifer of the Lower Cretaceous Luohe Formation sandstone in the Jurassic coalfield of Huanglong, due to mining-induced disturbances in the roof, poses a significant threat to the safe production of mines. To ensure mine safety, this study investigates key indicators such as water source recharge, water-conducting pathways, and recharge intensity. A mathematical model based on multiple disaster-causing factors was developed, and a water hazard evaluation system for the Jurassic coalfield in the Huanglong region was established using a GIS platform. Validation through underground borehole data revealed a high correlation between the evaluation results and the verification data, with boreholes in stable zones showing low inflow rates (< 5 m³/h), while anomalous and hazardous zones demonstrated higher inflow, confirming the effectiveness and accuracy of the assessment system. The findings of this study provide a scientific basis for water hazard prevention and control during coal seam mining in the Huanglong Jurassic coalfield and surrounding areas.