Integrated exploration of water disaster sources in metal mines using the Equivalent Reverse Flux Transient Electromagnetic Method and DC Charging Method

Water disasters in metal mines constitute a critical threat to mine safety and production.Their occurrence not only disrupts production progress but may also directly result in casualties and substantial property losses.Such water disasters in metal mines primarily manifest as seepage through concealed underground fractures.Over time,the accumulation of seepage can trigger accidents that endanger mine safety,such as collapses in working areas.Therefore,identifying the potential factors that lead to water disasters in metal mines is of paramount importance.This paper focuses on tracing the source of an unidentified water disaster occurring in the Jinduicheng Molybdenum Mine in the East Qinling Mountains.The equivalent reverse flux transient electromagnetic method and the DC charging method were optimally selected for non-destructive detection in the study area.Through comprehensive geophysical analysis,the source of the water disaster is identified as river water seepage adjacent to the mine pit.Furthermore,the concealed water seepage pathways are accurately delineated based on the extreme variation characteristics of geophysical parameters,including resistivity,potential,and potential gradient.The results provide a reliable basis for the subsequent implementation of water disaster control measures.