Mine transient electromagnetic ground and underground stereo double magnetic source detection method

A transient electromagnetic and detection method technology, applied in the detection field, can solve problems such as the limited detection depth of small coils, achieve the effects of solving key problems of synchronization, enriching geological data, and increasing detection depth

Inactive Publication Date: 2018-03-16
CHINA UNIV OF MINING & TECH
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Problems solved by technology

However, due to environmental factors in the tunnel, only small coils can

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  • Mine transient electromagnetic ground and underground stereo double magnetic source detection method
  • Mine transient electromagnetic ground and underground stereo double magnetic source detection method
  • Mine transient electromagnetic ground and underground stereo double magnetic source detection method

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[0031] The present invention will be further described below in conjunction with the accompanying drawings.

[0032] like figure 1 shown as a

[0033] As shown in 9, it is a framework flowchart of the mine transient electromagnetic well upper and lower three-dimensional dual magnetic source detection method of the present invention. First, the problem to be solved is determined according to the mine hydrogeological characteristics, and then a dual magnetic source is established based on the mine geological characteristics and the problems to be solved. The source transient electromagnetic observation system is used to conduct downhole and uphole dual-source excitation and downhole observation data; finally, the observation data is processed and interpreted, and conclusions are drawn.

[0034] Specifically, the mine transient electromagnetic well upper and lower three-dimensional dual magnetic source detection method of the present invention includes the following detection st...

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Abstract

The invention discloses a mine transient electromagnetic ground and underground stereo double magnetic source detection method. A transient electromagnetic field is excited by using ground and underground double magnetic sources for aiming at the geological conditions of the deep mine, i.e. a coincident loop device of a ground high-power excitation coil and a set of underground receiving coil anda transmitting coil forms a detection system. Vortex current for exciting a good conductor is enhanced by using the high-power transmitting coil on the ground, the secondary signal is enhanced, the transient electromagnetic detection depth is increased and the secondary field signal is received in the tunnel so that simultaneous excitation of the ground transmitting coil and the underground excitation coil can be performed. The overall transmitting power can be greatly enhanced and the mine transient electromagnetic detection depth can be increased so that the method is significant.

Description

technical field [0001] The invention relates to a detection method, in particular to a mine transient electromagnetic well upper and lower three-dimensional dual magnetic source detection method suitable for detecting hidden water-rich bodies in large-depth coal mines. Background technique [0002] In the prevention and control of water inrush in coal mines, the transient electromagnetic method has been widely used, which reduces the occurrence of water inrush accidents in coal mines, reduces economic losses, and ensures the safety of the people. Transient electromagnetic method is a promising method, which is sensitive to low-resistance anomalies and can identify water-bearing geology such as karst caves and passages, coal mine goafs, and deep irregular water bodies. The transient electromagnetic method has the advantages of large detection depth, sensitivity to low-resistance geological bodies, good coupling with the detection target, strong abnormal response, simple shape...

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Application Information

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IPC IPC(8): G01V3/28
CPCG01V3/28
Inventor 于景邨苏本玉
Owner CHINA UNIV OF MINING & TECH
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