Electrode random distribution type three-dimensional high-density electrical method data acquisition method

Abstract

The invention discloses an electrode random distribution type three-dimensional high-density electrical method data acquisition method. The method optimizes a fragmentation acquisition measurement point set and measurement area rolling measurement through designing a dipole moment, measurement point density and an effective measurement radius and through the concept of an effective measurement circular domain. Through targeted reconnaissance, clear imaging of an underground detection target is realized. The measurement method is simple, orderly and efficient, continuous measurement of the complete measurement area can be achieved, and the collection efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of electrical prospecting, and in particular relates to a method for collecting randomly distributed three-dimensional high-density electrical data of electrodes. Background technique [0002] The high-density resistivity method is an array prospecting method developed on the basis of common electrical prospecting. The traditional high-density electrical method is to connect all electrodes in series through cables and connect them to the instrument. The program-controlled switch inside the instrument is set according to the type of device (such as Wenner, dipole-dipole, unipolar-unipolar, etc.), and all electrodes Select the combination of power supply (A, B) and measurement (M, N) electrodes that meet the device setting requirements for automatic measurement, and then calculate the apparent resistivity value ρ corresponding to the device parameters s , and then through data processing (mainly inversion ima...

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Problems solved by technology

Long and bulky cable connections not only increase labor intensity, but also the presence of obstacles (rivers, large buildings, traffic arteries, etc.) often make it difficult to implement on-site cable laying work

[0007] 3. The current high-density electrical 3D prospecting uses a regular grid to arrange measuring points / surveying lines, and the moving sequence of measuring points can only advance in two orthogonal directions along the measuring line, which can only be a pseudo-3D measurement, not a complete random placement of electrodes in the sense

2. The problem of measuring station rolling. When the number of instruments or collecting stations is difficult to meet the needs of covering the entire measurement area, how to find and move the used collecting stations to the station to be measured to realize rolling measurement

However, the random distribution of electrodes greatly increases the arbitrariness and complexity of the observation system layout, and the exploration depth and resolution have great uncertainty. It is a technical bottleneck restricting the popularization and application of this method

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