Journal of the Korean Society of Mineral and Energy Resources Engineers ISSN:2288-0291(Print) 2288-2790(Online) 한국자원공학회지

At present, two kinds of study in resistivity tomography have been carried out for providing a useful information in field work. One is numerical modeling and the other is scale modeling. The former has been widely studied in geophysical research, but the latter is so weak relatively. Pole-pole array is one of the most useful arrays in cross-borehole resistivity tomography, but it has been reported that pole-pole array has a lot of problems. For solving the problems, many kinds of electrode arrays were suggested, for instance, dipole-dipole array, bipole-bipole array, and so on. In this paper, we tried to find out the most compatible electrode array that has a good resolution. We experimented in 3-dimensional scale modeling for considering the resolution in two models separated vertically and horizontally. We got the data as the distance between two models was changed in various electrode arrays. The result is that dipole-dipole array had excellent resolution in every cases. Also when we added inline data to cross-hole data, we could find it out that the resolution was improved.