高密度电法在某垃圾焚烧环保发电站岩溶c场地勘察中的应用

岩溶是某垃圾焚烧环保发电站场场址勘察的主要不良地质作用，为了查明岩溶和破碎带的分布情况，本文利用高密度电阻率法来探测能引起低阻异常的岩溶等地质体。在调查该区地层和溶洞的类型、分布及电性特征的基础上，利用RES2Dmod建立包含不同规模和埋深的低阻溶洞或破碎带模型，通过对比模型的温纳、偶极和微分三种装置类型的正反演结果，在本地区选用分辨率和稳定性高的温纳装置进行高密度勘测。利用高密度电阻率法查明了两个落水洞的埋深和分布情况，推测了4个疑似溶洞和破碎带，部分与后期验证钻孔吻合。利用合适的装置类型进行高密度探测可以查明充水充泥低阻溶洞的规模及分布，是一种经济有效的场址勘察方法。

Application of the high-density resistivity method in karst site investigation of a waste incineration environmental protection power station

Karst is a main adverse geological effect on the site of a power station of garbage incineration environmental protection. In order to clarify the distribution of karst and broken zones, this work used the high- density resistivity method to detect the karst and other geological bodies that can cause low resistivity anomalies. On the basis of investigating the formation and the type, distribution and electrical characteristics of karst caves, RES2Dmod was employed to build models of low-resistance caves or fracture zones with different sizes and burial depths. By comparing the forward and inversion results of Wenner, dipole and differential devices of the models, the Wenner device with high resolution and stability was selected to carry out high-density survey in the study area. The high-density resistivity method was used to probe the burial depth and distribution of two sinking holes, and four suspected caves and broken zones were speculated, which are partially consistent with the later verification boreholes. This work demonstrates that it is an economical and effective site survey method to investigate the scale and distribution of low-resistance karst caves filled with water and mud by high-density detection with an appropriate device type.