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灰岩地区，建筑场地的岩溶勘察是个重要课题，也是工程界的一大难题。溶洞与灰岩之间存在明显的高频电性差异，为应用钻孔电磁波法提供了良好的地球物理前提。通过广州地区的应用实例说明，本方法不仅可以定性划分岩溶发育区和非发育区，而且还可以半定量地求出隐伏溶洞的空间分布以及钻孔揭露溶洞的延伸范围。
Limestone area, karst survey of the construction site is an important issue, but also a major problem for the engineering community. There are obvious differences in high-frequency electricity between caverns and limestone, which provides a good geophysical precondition for the application of drilling electromagnetic waves. The application example in Guangzhou shows that this method not only can qualitatively divide the karst development area and non-development area, but also can semi-quantitatively calculate the spatial distribution of the hidden karst cave and the extent of the drilling to expose the karst cave.