A method for processing transient electromagnetic data in mine space
A transient electromagnetic, full-space technology, applied in the field of geophysical exploration, can solve the problems of large amount of data, complex forward modeling, not involving mine transient electromagnetic inversion, etc., to achieve high optimization efficiency and improve data processing quality. Effect
Active Publication Date: 2021-03-26
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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[0012] The Chinese invention patent with the publication number CN105589108A discloses a transient electromagnetic fast three-dimensional inversion method based on different constraints. It adopts data processing and three-dimensional forward modeling method based on transient electromagnetic moment transformation, which solves the problems faced by the current three-dimensional inversion. The problem of large amount of data and complicated forward modeling; the constraints of the time constant vector in the inversion are constructed, and the optimization algorithm is used to iterate the inversion problem, so that the inversion process is optimized in a direction close to the actual underground structure
This invention is applied to the transient electromagnetic inversion of large loops on the ground, but cannot be applied to the transient electromagnetic detection of small loops in mines.
[0013] The above-mentioned methods respectively discussed mine transient electromagnetic image processing, resistivity correction, inductance correction, ground and aerial transient electromagnetic inversion, but none of them involved mine transient electromagnetic inversion
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[0047] In this embodiment, firstly, a method for interpreting transient electromagnetic data in a mine space is provided. The method will be described in detail below in conjunction with the accompanying drawings.
[0048] The method for interpreting the full-space transient electromagnetic data of a mine comprises the following steps:
[0049] (1) Data preprocessing;
[0050] The data recorded by mine transient electromagnetic detection often contains some interference, and the original data needs to be processed technically, including deleting bad sectors and filtering to remove noise, etc., to eliminate or reduce the influence of interference factors.
[0051] (2) Set the inversion parameters of particle swarm algorithm;
[0052] According to the requirements of the particle swarm optimization algorithm, the number of particles, the maximum allowable number of inversion iterations, the size of the inversion error, the construction of inertia factors, etc. are set to meet ...
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The invention relates to a transient electromagnetic data processing method, which belongs to the technical field of geophysical exploration, in particular to a mine full-space transient electromagnetic data processing method. The present invention introduces the inversion processing technology into mine transient electromagnetic data processing to improve the data processing quality. The present invention adopts the combined inversion method, which not only solves the problem that the damped least square method needs to provide an initial model artificially, but also makes full use of the particle swarm The advantage of being able to perform global optimization, the present invention relies on the particle swarm algorithm to provide an initial model for damping least squares, taking into account the characteristics of particle swarm optimization that can perform nonlinear inversion and the advantages of high efficiency of damping least squares optimization .
Description
technical field [0001] The invention relates to a transient electromagnetic data processing method, which belongs to the technical field of geophysical exploration, in particular to a mine full-space transient electromagnetic data processing method. Background technique [0002] As a technical means to solve geological problems by using physical methods, geophysical prospecting technology has been widely used in the field of geological prospecting. Transient electromagnetic method is a kind of geophysical exploration method. It uses the law of electromagnetic induction as the detection principle, and detects and infers its electrical characteristics by receiving the induced secondary field generated by geological anomalies. [0003] There are many working devices for transient electromagnetic method, which can be divided into aviation transient electromagnetic method, ground transient electromagnetic method, ground well transient electromagnetic method and mine transient ele...
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IPC IPC(8): G01V3/38G06F30/25G06N3/00
CPCG01V3/38G06N3/006G06F30/20
Inventor 李明星冯宏王鹏姚伟华程建远
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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