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自然界中几乎所有的地质结构都是三维的,尤其是对于矿体形态变化很大的金属矿,常规的二维电法探测很难准确刻画其三维形态,另一方面,极化率参数对硫化物金属矿的反映更为直接有效,因此开展三维电法工作获取电阻率和极化率三维形态,是深部矿产资源探测的迫切需求,也是当前电法的发展方向.本文从原理、装置、硬件系统、反演方法及软件等方面,介绍了分布式三维直流电法勘探研究进展.通过对TITAN-24、NEWDAS和IRIS分布式系统的特点及其应用实例分析,发现由于同时观测不同方向的电性参数,大大提高了横向分辨率;大功率、大极距的采集方法,有效加大了勘探深度;分布式的测站布设,提高了工作效率;采用全波形记录前提下,在干扰严重的老矿山周边,仍能采集到有效的电法数据,为危机矿山的深、边部找矿开辟了新的途径.
Almost all geological structures in nature are three-dimensional, especially for the metal ore with widely varying morphologies of ore bodies, the conventional two-dimensional electrical detection is difficult to accurately characterize the three-dimensional shape. On the other hand, Therefore, it is an urgent need to explore the deep mineral resources in order to obtain three-dimensional resistivity and polarizability in 3D electrical work, which is also the development direction of the current electrical method.In this paper, the principle, device, hardware System, inversion method and software, this paper introduces the research progress of distributed three-dimensional direct current method.According to the characteristics of TITAN-24, NEWDAS and IRIS distributed system and its application examples, it is found that, because of the simultaneous observation of the electrical properties in different directions Parameters, greatly improving the horizontal resolution; high power, large polar distance acquisition method, effectively increasing the depth of exploration; distributed station layout, improve work efficiency; using full waveform recording premise, in the interference of the old Surrounding the mine, still can collect effective electric law data, opened up a new way for prospecting for the deep and the edge of the crisis mine.