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利用电法勘探寻找土洞已经普遍运用,现在谈几点我们在实际工作中得到的体会。一、抓住突变点一般地下水通道比较长,离基岩破碎带较远、体积又不很大的土洞,在电探中的反映往往容易被勿视。此原因在于这类土洞的ρ_S曲线反映主要是以突变点的形式出现;不论是对称四极法还是联合剖面法等都是这样,无令人注目的异常,特别是在点距大的测线中更是如此。在广西某糖厂的勘探过程中,我们根据
The use of electrical prospecting to find the soil hole has been widely used, and now talk about what we get in the actual work experience. First, to seize the mutation point In general, the waterway is relatively long, broken away from the bedrock far, volume is not very large soil hole, the reflection in the probe is often easy to be ignored. The reason for this is that the ρ_S curves of these soil caves reflect mainly in the form of sudden change points; neither is the symmetrical quadrupole method nor the united cross-sectional method, and so on. There are no notable anomalies, especially in the case of large pitch Even more so in the line. In Guangxi, a sugar exploration process, we based