关键词: 瞬变电磁法, 震波法, 缓倾斜磷矿, 隐蔽致灾, 采空区

Abstract: Concealed disaster-causing factors are the main hazards threatening the safe mining of gently inclined phosphate mines，and they are prone to trigger major disasters such as collapse of the mined-out areas and water inrush. To achieve efficient and precise detection of concealed disaster-causing factors such as the mined-out areas and hydrogeology of Baizhu Phosphate Mine，this study based on the systematic analysis of the geological conditions and potential risks of the mining area，comprehensively uti⁃ lized various geophysical detection technologies. According to the terrain and geological conditions of the mining area，multiple methods were used for combined detection and mutual verification，with a focus on using the ground transient electromagnetic method to delineate low-resistance anomaly areas，detecting wa⁃ ter bodies and water-conducting channels；the mine transient electromagnetic method was used to conduct detailed detection around the underground tunnels；the seismic wave method was used to identify the loos⁃ ening zones and boundaries of the void areas. The results show that 15 mined-out areas are delineated in the II，III，and VI mining sections，with a total area of 75 000 m2 . Among them，the seismic wave detec⁃ tion of one mined-out area shows no obvious physical properties，and no water accumulation is found in the mined-out area. On the roof of the F11 fault，F17 fault，and ZK5301 drilling hole detection areas，lo⁃cal low-resistance anomalies are observed. The study confirms the effectiveness of the comprehensive geo⁃ physical exploration methods in the comprehensive survey of concealed disaster-causing factors in gently inclined phosphate mines，and the technical combination and working mode can provide references for di⁃ saster warning and safety prevention in similar mines.

Key words: transient electromagnetic method, shock wave method, gently inclined phosphate mine, concealed disaster-causing , mined-out area