高密度电阻率法二维勘探数据的三维反演及其在岩溶探测中的应用

3-D inversion of high density resistivity method based on 2-D high-density electrical prospecting data and its engineering application

三维高密度电阻率法可以有效地解决二维高密度电阻率法在探测空间形态上的不足。将高密度电阻率法二维勘探数据做三维反演,不仅实现了地下空间结构的三维电阻率成像,还克服了传统三维高密度电阻率法在经济成本上的限制。将此方法应用到岩溶勘探中,利用DUK-2A高密度电法仪系统采集数据;然后,把二维高密度数据拼接转化成三维可反演数据,再将反演得到的结果通过三维成像软件实现任意三维地电切片,从而获得丰富的地电结构信息;最后,结合三维切片与钻孔资料对溶洞进行解释,为工程的顺利施工提供科学依据,从而证明该方法的可行性和有效性。

The two-dimensional high density electrical method can overcome the limitation of three-dimensional high density electrical method on topography and cost. The 3d high density electrical method can effectively solve the deficiency of two-dimensional high density electrical method in detecting space morphology. Therefore, Three-dimensional inversion of data obtained from two-dimensional exploration of high density electrical method has not only realized the three-dimensional visualization of underground space structure but also avoided the impact of topography and cost. Applying this method to the exploration of karst caves, using DUK-2A high density electrical system to collect data, and then convert the two-dimensional high density data into three dimensional inverse data, the results of the inversion can be obtained by any 3d dielectric section, by Slicer Dicer, in order to get rich information about the cave, finally, the interpretation of karst cave is made by combining the 3d dielectric section and borehole data, providing scientific basis for the smooth operation of the project, the feasibility and validity of this method are proved.