地质雷达在遵义某水库岩溶勘察中的应用

Application of Geological Radar in Karst Exploration of a Reservoir in Zunyi

遵义某水库可研阶段地质钻探结果揭露该区深部岩溶发育。为验证低频率地质雷达在深部岩溶探测中的效果,在坝址区布置2条连续测线,采用RTA50 MHz低频非屏蔽天线地质雷达探测,结果显示,岩溶异常区除浅部有分布外,深部30~55 m也有分布。经与现场钻孔成果比对,结果表明:两种方法探测得出的异常位置基本吻合;在岩溶地区采用低频率地质雷达能够探测深部岩溶发育情况,且具有一定的探测精度。该文可为类似场地的地质勘察提供一定的参考。

The results of geological drilling at the feasibility study stage of a reservoir in Zunyi revealed the development of deep karst in the area.In order to verify the effect of low frequency geological radar in deep karst exploration,two continuous survey lines are arranged in the dam site area and RTA50 MHz low frequency unshielded antenna geological radar is used for exploration.The results show that the karst abnormal area is distributed in the shallow part and also in the deep part of 30~55 m.Compared with the field drilling results,the results show that the abnormal positions detected by the two methods are basically consistent;Low frequency geological radar can be used to detect the development of deep karst in karst areas,and it has certain detection accuracy.This paper can provide some reference for geological investigation of similar sites.