瞬变电磁与高密度电法在岩溶区探测中的应用

Application of Transient Electromagnetic and High Density Electrical Methods in Subsidence Area Detection

地下岩溶、空洞等不良地质体发育常引发地表塌陷、沉降等事故,需对此隐伏灾害体的空间分布及发育特征进行精准探测。采用瞬变电磁法与高密度电法对某岩溶塌陷区进行综合探测,结果表明:探测区内存在多处疑似岩溶发育区,其中以YC-1、YC-2为主岩溶发育区,范围较大,多分布在高程-30^-200m范围。采用钻探技术对YC-2岩溶发育区进行施工验证,与综合探测结果相一致,说明了瞬变电磁法与高密度电法综合物探方法对岩溶探测的可行性与有效性。

Since the development of unfavorable geological bodies such as underground karst and voids often causes surface collapse and settlement,the spatial distribution characteristics of the hidden disasters need to be accurately detected.The article uses transient electromagnetic and high-density electrical methods to comprehensively detect a subsidence area.The results show that there are many suspected karst development areas in the detection area,among which YC-1 and YC-2 are the karst development areas with a larger range,distributed mainly in the range of-30^-200m.The drilling technology is used to verify the YC-2 karst development area,which is consistent with the comprehensive detection results,demonstrating the feasibility and effectiveness of the transient electromagnetic and high-density electric methods integrated geophysical exploration method for ground collapse detection.