湖南省岳家桥典型岩溶发育区电性特征及构造格架研究

Electrical characteristics and tectonic framework of typical karst zone in Yuejiaqiao area of Hunan Province

为探讨湖南省益阳市岳家桥地质灾害现状,以区内典型岩溶发育区为研究对象,通过长剖面高密度电法、视电阻率联合剖面法等地球物理方法,研究了地层电性响应特点,利用钻孔数据和综合电法勘探数据建立了三维地层结构模型,揭示了典型区域近地表电性结构形态,构建了区内三维地层构造格架,圈定了岩溶发育范围,并评价了地质灾害程度。研究表明:因地制宜地利用综合电法勘探,有助于在我国南方含水较多的岩溶发育区快速、有效地进行灾害范围的圈定和评价。

In order to investigate the current situation of geological disasters in Yue Jiaqiao area in Yiyang City of Hunan Province,the arthors took the typical karst zone here as the research object.The electrical response characteristics of the formation were studied through geophysical methods,such as long-profile high-density electrical method and apparent resistivity combined profile method.A three-dimensional stratigraphic structure model was established by using drilling data and integrated electric survey data.The authors have also revealed the near-surface electrical structure,constructed a three-dimensional stratigraphic framework in this area,delineated the karst range and evaluated the degree of geological disasters.The results show that the integrated electrical prospecting method based on local condition can be useful for quick and effective delineation and evaluation of disaster areas in the karst zones with more water in southern China.