The transient electromagnetic method is an effective method for detecting the distribution extent and characteristics of the minedout area. Nevertheless, the measured data cannot be obtained accurately by common measurement mode of the transient electromagnetic method where there exists high electromagnetic interference. This paper introduces a "8"shaped grapheme measurement mode with strong antiinterference capability, with which a better minedout area prospecting result was obtained in Fangshan District of Beijing. High resolution resistivity profile was got through profile prospecting and corresponding time domain resistivity imaging data processing. The distribution extent and characteristics of the minedout area were also deduced. It is thus thought that this method can provide a new means for high electromagnetic interference minedout area prospecting and the scientific basis for tackling and preventing land collapse aggravation.