Multicomponent transient electromagnetic method in coal mine hole

A transient electromagnetic method and multi-component technology, applied in the direction of electric/magnetic detection for logging records, etc., can solve problems such as single azimuth, interference with transient electromagnetic instrument detection, and unavoidable interference of receiving coils

Inactive Publication Date: 2013-09-04
FUZHOU HUAHONG INTELLIGENT TECH
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Under the coal mine, because the human interference field when the electrical equipment is running will seriously interfere with the detection of the transient electromagnetic instrument, it is difficult for the receiving coil to avo

Method used

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  • Multicomponent transient electromagnetic method in coal mine hole
  • Multicomponent transient electromagnetic method in coal mine hole
  • Multicomponent transient electromagnetic method in coal mine hole

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Embodiment Construction

[0044] Such as figure 1 , is a block diagram of the overall structure of a multi-component transient electromagnetic instrument in a coal mine underground hole according to the present invention, including a transmitter and a receiver, the transmitter includes a transmission power supply, a transmission control circuit, and a transmission coil; the receiver includes a magnetic probe , receiving signal conditioning circuit, ADC, receiving power supply and data processing platform, the magnetic probe is connected to the input terminal of the receiving signal conditioning circuit through a cable, the ADC input terminal is connected to the output terminal of the signal conditioning circuit, and the ADC output terminal is connected to the data processor platform, receiving The power supply supplies power to the receiving signal conditioning circuit, ADC and data processing platform. The magnetic probe receives the secondary field generated by the geological body. Calculation.

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Abstract

The present invention relates to a multicomponent transient electromagnetic method in a coal mine hole. A magnetic probe is used to receive a secondary field generated by a geologic body, the secondary field is amplified by a receiving signal conditioning circuit and then is sent to an ADC (Analog-Digital Converter) to conduct digital to analog conversion, and then the inversion calculation of a data processing platform is conducted. The magnetic probe comprises a magneto sensor and a low-noise operational amplifier circuit, and the magneto sensor is connected with the low-noise operational amplifier circuit and is then connected to the input terminal of the receiving signal conditioning circuit of a receiver through a cable. By the adoption of the multicomponent transient electromagnetic instrument probe in the coal mine hole, the human interference field during the operation of electrical equipment on a roadway, head-on and a working surface outside the geologic body is avoided; and the secondary filed from different directions can be received so as to carry out the three-dimensional data inversion of the geologic body more really.

Description

technical field [0001] The invention relates to a mine geophysical prospecting method, in particular to a multi-component transient electromagnetic method in a coal mine underground hole. Background technique [0002] The transient electromagnetic method sends a transient primary field to the geological body through a transmitting coil. This rapidly decaying electric field induces a new eddy current field (secondary field) in the geological body, and the magnetic probe receives the change characteristics of the secondary field to reflect Geological and electrical characteristics. The main advantage of the transient electromagnetic method is that it is convenient for construction and the effect is clear. Its main disadvantages are as follows: [0003] 1. In the transient electromagnetic method, the interference signals are mainly natural electromagnetic field noise and human interference, which are also called background fields. Under the coal mine, because the human interf...

Claims

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Application Information

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IPC IPC(8): G01V3/28
Inventor 林晓
Owner FUZHOU HUAHONG INTELLIGENT TECH
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