基于不同装置的二维高密度电法勘探效果比较与分析

Comparison and analysis of 2D high-density electrical prospecting effect by different devices

为比较分析高密度电法不同装置对探测异常地质体的效果,通过建立高阻异常体和隐伏直立低阻体地电模型,正演计算了不同装置类型下的视电阻率,并加噪进行二维电阻率反演。各种装置的反演结果表明:在探测地下高阻异常体时,温纳α、β、γ装置优于其他装置,揭示异常位置与形态相对较好;对于隐伏直立低阻体而言,温纳β装置和三极装置探测效果好,其中温纳β为最理想装置。实例验证表明,温纳α、β、γ装置在探测地下防空洞时体现了其装置的优越性,验证了理论模拟结论的正确性。

In order to comparatively analyzing the effect of exploring the unusual geologic bodies with different devices of high-density electrical method, the authors forward calculated the resistivitiy of different devices and inversed the two-dimension resistivity adding noise through building high resistance anomalous body and latent erected low resistance geoelectric model. The inversion results of various devices show： when high resistance anomalous body is explored underground, wenner α,β and γ devices are better than others in exploring anomalous location and shape; for latent erected low resistance body, the wenner β and three-pole devices have good prospecting effect with the best device is wenner β. The experiment indicate that wenner α, wenner β and wenner γ devices perform their advantages in exploring underground air-raid shelter and verify the correctness of conclusion from theoretical modeling.