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Electrical advanced detection system and method

A technology of advanced detection and electrical method, which is applied in the fields of electrical/magnetic detection for well logging records, climate sustainability, water resource assessment, etc., and can solve the problems of large errors in advanced detection work and inability to accurately locate anomalies , to achieve the effects of saving drilling workload, improving construction efficiency and less interference

Inactive Publication Date: 2020-04-17
ANHUI HUIZHOU GEOLOGY SECURITY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is: how to solve the problem that the existing advanced detection work has large errors and the abnormal position cannot be accurately located

Method used

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  • Electrical advanced detection system and method
  • Electrical advanced detection system and method
  • Electrical advanced detection system and method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Such as figure 1 As shown, the electrical advanced detection system, the advanced detection system includes at least two advanced exploration boreholes, an electrode 1, an electrical instrument 3 for power supply, current and voltage collection, the advanced exploration borehole is located in front of the heading, and the advanced exploration drill One or more electrodes 1 are arranged in the hole, and the electrodes 1 in the advance drilling hole are connected to the electrical instrument 3 through the cable 2. The electrical instrument 3 can use the equipment in the prior art, and can also be selected with power supply and acquisition as required. All-in-one device.

[0041] Advance exploration drilling refers to the drilling in the coal and rock body at a certain distance in front of the excavation, which is used to detect the safety situation ahead and prevent gas outburst. Usually there will be multiple advanced exploration drilling holes before the head-on excava...

Embodiment 2

[0051] Such as Figure 4 As shown, the difference between this embodiment and the first embodiment is: (1) also includes the roadway electrode 41 in the roadway 4; (2) different from the electrode in the first embodiment;

[0052] In the advance detection system, one or more tunnel electrodes 41 are arranged in the tunnel 4 , and the tunnel electrodes 41 are connected to the electrical instrument 3 through the cable 2 . The distance between adjacent roadway electrodes 41 is less than 2m.

[0053] The electrodes in the roadway are not pocket electrodes, but ordinary electrodes (metal rods, metal sheets, etc.), which can be fixed on the side walls or bottom plates of the roadway.

Embodiment 3

[0055] Such as Figure 5 As shown, the difference between the present embodiment and the first embodiment is that it has more than one V-shaped structure.

[0056] The present invention also provides a detection method using the advanced detection system in the first or second embodiment above, including the following steps:

[0057] S01: Use roadway excavation to excavate at least two advance exploration boreholes that meet the requirements in front of the head, so that the advance exploration boreholes meet the following conditions: the distance between the two advance exploration boreholes is greater than or equal to 40m, and the two advance exploration boreholes are respectively connected to The angle formed by the connection between the heads of the excavation is greater than or equal to 23°, and the distance between the advance drilling hole and the head of the excavation is greater than or equal to 102m; to ensure that the water damage area in front can be covered; if t...

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Abstract

The invention discloses an advanced detection system which comprises at least two advanced detection drill holes, electrodes and an electrical prospecting apparatus used for supplying power and collecting current and voltage, wherein the advanced detection drill holes are located in front of a tunneling head-on, one or more electrodes are arranged in the advanced detection drill holes, and the electrodes are connected with the electrical prospecting apparatus. The invention further provides a method adopting the system. The system and the method have the advantages that the electrodes are arranged in the drill holes, then geophysical prospecting detection work is carried out, the geophysical prospecting advanced detection technology and the drilling advanced detection technology are combined, the water damage distribution situation in front of a tunneling roadway can be accurately obtained, the field drilling workload is reduced, the construction efficiency is greatly improved, and theroadway tunneling work progress is improved.

Description

technical field [0001] The invention relates to a geophysical detection technology, in particular to an electrical advanced detection system and method. Background technique [0002] Coal mine roadways are threatened by water hazards in front of them during the excavation process. The current solution is to carry out comprehensive advance detection work of geophysical prospecting or drilling in front of the roadway in accordance with the "Coal Mine Water Prevention and Control Rules" to predict the water-rich area in front of the roadway excavation in advance. Take measures to deal with water hazards ahead of excavation to ensure safe excavation of roadways. [0003] At present, the advanced detection of underground roadway is divided into two directions of technology, one is the advanced detection technology of geophysical prospecting, and the other is the advanced detection technology of drilling; [0004] Geophysical advanced detection technology reflects the resistivity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/18
CPCG01V3/18Y02A90/30
Inventor 任川曹煜兰鹏波付中弘王亚飞刘燕蒋相全郭珏
Owner ANHUI HUIZHOU GEOLOGY SECURITY INST
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