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超高密度电法是一种新型、高效且实用的电法勘探方法,数据信息量是常规方法的数十倍以上.本文从超高密度电法的基本理论与数据采集方式入手,阐述了超高密度电法的全四极装置观测方式,推导了基于双线性插值、三角形剖分的超高密度电法正问题有限单元法求解方法;提出了超高密度电法的偏导数矩阵混合求解及最小二乘广义线性反演算法.以一个典型地电模型为例,分别采用超高密度全四极装置与五种常规排列装置进行正演模拟并反演成像,反演结果表明,超高密度全四极装置相对于单一装置采集方式具有探测数据量大、抗干扰能力强、数据反演异常结果能够更好的刻画实际地质情况的特点.最后,采用超高密度电法对倾斜板状体地电模型进行正反演,说明了该方法能较好的反映出地下电性的分布,有效提高物探解释的可靠性及勘探的准确性.
Ultra-high density electrical method is a new, efficient and practical method of electrical prospecting, the amount of data is more than a few times the conventional method.This paper starts with the basic theory and data acquisition methods of ultra-high density electrical method, High-density electrical method full quadrupole device observation method, based on bilinear interpolation, triangulation, ultra-high-density method is derived finite element method of finite element method; Proposed ultra-high density method of partial derivative matrix hybrid solution And the least square generalized linear inversion algorithm.A typical electric model is taken as an example, the forward modeling and inversion imaging are carried out by using ultra-high density all quadrupole device and five conventional alignment devices respectively. The inversion results show that the ultra-high Compared with the single device, the acquisition method of the density quadrupole device has the advantages of large amount of detection data, strong anti-interference ability and abnormal data inversion, so it can characterize the actual geological conditions better.Finally, using the ultra-high density electrical method, The results show that this method can better reflect the distribution of underground electricity and effectively improve the reliability of geophysical interpretation and the accuracy of exploration.