Application of high density electrical method in karst exploration in Qinhuangdao area
High density electrical method is a geophysical prospecting method with mature technology,strong anti-interference ability,high resolution,low cost and convenient construction.It is widely used in karst explora-tion.In order to find out the distribution and development of karst in a construction site in Qinhuangdao,karst detection was carried out by high-density electrical method and drilling verification was carried out.The results show that the high-density electrical method can better identify the stratigraphic structure and shallow low-resistance anomalies.A total of 22 karst anomalies are delineated with the down-concave trend or groove on the high-resistance interface of limestone as the karst characteristics.Two of the anomalies were verified by drilling.The drilling results are in good agreement with the geophysical interpretation results.It can be seen that the high-density electrical method is effective in the karst survey in Qinhuangdao area.The research can provide some refer-ence for the karst survey in Qinhuangdao area.
high density resistivity methodkarst explorationkarst caveverified by drillingQinghuangdao
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