ANALYSIS OF RESOLUTION INFLUENCE FACTORS OF HIGH-DENSITY ELECTRICAL METHOD AND ITS APPLICATION

In recent years, high-density electrical method have been used more and more widely and the researches on resolution influence factors analysis of the high-density electrical method have been drawn much attentions. This paper takes the partially erect anomaly of a uniform half-space as detect target, building different models to simulate and analyze with the Wenner high-density electrical device, employing 2DRES software to process forward and inverse numerical simulation and analysis to obtain the effects of the terrain, resistivity differences, depth to diameter ratio and deepening on the high-density electrical probe resolution. The results show that the undulating terrain makes the apparent resistivity anomaly location displaced, shape distorted and the resolution reduced; the detecting resolution of high-density resistivity method increases with the increase of resistivity difference; the detecting resolution decreases with the increase of depth to diameter ratio, and the detecting resolution increases with the increase of extended depth when the lateral width of certain anomalies reaching a critical level. Finally, the recommendations to improve the detecting resolution are given by combining the theoretical analysis and the engineering application.