关键词: 溶蚀岩体, 瞬变电磁法, 探地雷达法

Abstract: With the effect of groundwater, calcareous sandy conglomerate in area of Guanyinyan hydropower station was corroded along the direction of bedding or steep fracture, forming larger cystic cavity or hole. It was essential to find out the spatial distribution of corrosion rock. As sporadic and isolated distribution of corrosion rock, conventional geophysical detection method was difficult to achieve the purpose. By contrast test, a suitable detection technique combined with transient electromagnetic method, ground penetrating radar method and corresponding data processing method was used for Guanyinyan hydropower station, which achieved expected results.

Key words: corrosion rock, transient electromagnetic method, ground penetrating radar