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本文阐明三个问题:1)从电磁学基本原理出发,导出导电性矿体电磁感应二次场的普遍公式。这公式对任何类型的激发装置和接收装置以及对任何形状的矿体均适用,特別是在低频情况下具有普遍意义。2)从普遍公式出发,对感应二次场的频率特性和空间特性进行了分析,并用模型实验结果验证了理论。3)考察了电磁感应法的找矿效果和克服干扰的能力,并与直流电法作了比较,分析了两者的有利方面和不利方面,阐明了在电磁感应法中利用低频和多频以及观测多种要素的必要性。
This article elucidates three issues: 1) Based on the basic principles of electromagnetics, derive the general formula of the second field of electromagnetic induction of conductive ore body. This formula is suitable for any type of excitation and receiving devices as well as for any shape of ore body, in particular at low frequencies. 2) Based on the general formula, the frequency and spatial characteristics of the secondary field are analyzed, and the theoretical results are verified by the model experiment. 3) Investigated the prospecting effect of electromagnetic induction method and the ability to overcome the interference, and compared with the DC method, the advantages and disadvantages of the two methods were analyzed, and the application of low frequency and multi-frequency in electromagnetic induction method and observation Necessity of multiple elements.