Method for processing full-space transient electromagnetic data of mine

Abstract

The invention relates to a transient electromagnetic data processing method and belongs to the technical field of geophysical exploration, in particular to a method for processing full-space transientelectromagnetic data of a mine. According to the method, an inversion processing technology is introduced into mine transient electromagnetic data processing, thereby improving the data processing quality. According to the method in the invention, a combined inversion method is adopted so that not only the problem that an initial model needs to be manually provided for a damping least square method is solved, but also the advantage that a particle swarm can be subjected to global optimization is fully utilized; a combined algorithm is used for providing an initial model for the damping leastsquare method by means of a particle swarm algorithm; and the characteristics of nonlinear inversion of the particle swarm algorithm and the advantage of high damping least square optimization efficiency are taken into account.

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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Problems solved by technology

[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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