电阻率测深法在三河市地质灾害调查中的应用

The Application of Resistivity Sounding Method to Geological Hazard Survey in Sanhe

电阻率法勘探技术具有信息量大,对探测对象不造成伤害,成果直观、高效、准确等特点,被广泛地应用于岩溶勘查中。由高密度电法勘探深度小,电阻率测深法的探测深度相对较大,所以电阻率测深法在探测深度较大的岩溶方面具有很大的优势。在本文中,以三河市地面塌陷为依据,通过电阻率测深法对塌陷区周边岩溶发育情况进行面积性勘查,用2RES2DINV软件对数据反演,并对反演成果做三维分析,最终对勘查区岩溶强发育区进行了划分。结果显示在地面塌陷区周边还存在两个岩溶发育危险区,并全位于150m深度左右,其中一个位于村子内部,应及时对其做出风险预防措施。工程实例证实了电阻率测深法面积性探测工作在深部岩溶勘查中是一种行之有效的勘察方法。

Resistivity sounding method is widely used in karst exploration,because it has the characteristics of large amount of information,no harm to the detection object,intuitive result,high efficiency and accuracy.The high-density resistivity method has low exploration depth,but the resistivity sounding method has a certain advantage in detecting depth.Therefore,it is of great advantage to use the resistivity sounding method to detect the karst with large depth.In this paper,based on the ground subsidence of Sanhe,the development of karst around the subsidence area is surveyed by resistivity sounding method and the data are inverted by 2RES2 DINV software;and then the inversion results are analyzed by three dimensions;finally,the strong development of karst area is divided in the exploration area.The results show that there are two karst hazard zones around the ground subsidence area,which are all located at about 150 meters depth.One of them is located inside the village and should be put in a risk prevention measure in time.The application of the resistivity sounding method in deep karst exploration is proved to be a feasible and effective method.