1. Beijing Orangelamp Geophysical Exploration Co., Ltd., Beijing 102202, China 2. Third Geological Prospecting Institute, China Metallurgical Geological General Bureau, Taiyuan 030002, China
Induced polarization method is one of the most important geophysical methods for mineral exploration. There is strong electromagnetic interference in old mines, and traditional IP instruments are incapable of obtaining stable and reliable data. Pseudo-random signal electrical prospecting instrument is based on "system identification". It is a new electrical prospecting instrument with strong anti-interference capability and could be applied in old mines. Based on a case study of an old mine in Hebei Province, the superiority of pseudo-random signal electrical apparatus is further expounded.
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