Mine transient electromagnetic automatic observation method based on multi-field information feedback

Abstract

The invention discloses a mine transient electromagnetic automatic observation method based on multi-field information feedback, which belongs to the technical field of mine safety comprehensive prevention and control. The adopted observation system includes a mine transient electromagnetic detection system host, transmitting and receiving coils and a multi-field information feedback device. The observation method comprises steps: zero-point correction is carried out on the multi-field information feedback device, and a multi-field information initial value is acquired; transient electromagnetic measurement points are arranged according to the design of a detection scheme, a conventional observation system is arranged, the transmitting and receiving coil is arranged at each transient electromagnetic measurement point, and transmitting of transient electromagnetic primary field signals and receiving of induction secondary field signals are completed in sequence; data are acquired and processed; and other steps. The mine transient electromagnetic detection field environment can be reflected more accurately, and through real-time feedback and acquisition and storage of multi-field information transient electromagnetic data, random placement of mine transient electromagnetic underground transmitting and receiving coils, disorder measurement and automatic observation can be realized, and the transient electromagnetic detection efficiency and the resolution are improved.

Description

technical field [0001] The invention belongs to the technical field of mine safety comprehensive prevention and control, and in particular relates to a mine transient electromagnetic automatic observation method based on multi-field information feedback. Background technique [0002] The transient electromagnetic method is a method that uses an ungrounded return line or a grounded line source to emit a pulsed magnetic field underground, and uses coils or grounding electrodes to observe the secondary induced eddy current field caused in the underground medium during the intermittent period of the pulsed magnetic field. Transient electromagnetic method includes ground and mine transient electromagnetic method according to the scope of application. Mine transient electromagnetic method is widely used in coal mine underground excavation head-on advance, roadway roof and floor, working face roof and floor, and side water hazard detection. It is a time-domain method. method. [0...

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Problems solved by technology

[0004] First, the detection direction of the mine transient electromagnetic method is determined by the normal direction of the transceiver coil plane. The establishment of the detection direction and the design work of the observation system are all determined based on artificial placement, and the angle error is large;

[0005] Second, the background electromagnetic field in the coal mine has a great influence on the detection accuracy of the current mine transient electromagnetic method, and the conventional detection technology does not consider the influence of the background electromagnetic field on the detection results

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