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APPLICATIONS OF THE ELECTRICAL RESISTIVITY METHOD FOR DETECTION OF UNDERGROUND MINE WORKINGS

Abandoned mines are often difficult to locate. Detailed mine maps may be unreliable or missing. Conventional exploration (drilling) can easily miss targets as small as a mine entry. Nevertheless, geophysical methods are seldom employed to help map abandoned mines, possibly because geophysics surveys are perceived to be too expensive or will not help to solve the problem at hand. In actuality, there are situations where a geophysical survey can be expected to be effective and other times when the results may be more problematic. This paper reviews both the theoretical and practical aspects of electrical resistivity methods to define abandoned mine workings with the intent of defining conditions where the technique can be expected to produce useful results and the limitations of electrical measurements.