Abstract:

Direct current prospecting is a main method of electrical exploration in which the electric current is injected from the ground or in the borehole, and potential is received on the ground. Distribution of the underground physical properties are analyzed by processing the abnormal potential measured on the ground, and the spatial location of the underground ore body is deduced. This paper mainly study the method for calculating the manual potential from the observation electric potential measured by the square wave power supply. The results show that, when the collecting potential data are high quality data, there is little change in artificial potential calculated by using different lengths of window widths; while the collecting potential data is low level quality data, there is great change in artificial potential calculated by using different lengths of window widths; assuming that there is a group of theory potential data adding different proportions of random noise, using the different window widths for theoretical calculations of artificial potential, we can get accurately artificial potential by taking a short window width. These conclusions lay the groundwork for the next step of the data processing and interpretation.

Key words: Key words:direct current prospecting, manual potential, spontaneous potential, window width