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System and method for determining orientation of anomalous body on the basis of circumferential electrode scanning

An abnormal body and electrode technology, which is applied in the direction of electrical/magnetic detection for logging records, can solve problems such as defects and inability to determine orientation, and achieve the effect of simple structure and easy installation.

Inactive Publication Date: 2015-11-11
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

However, due to the principle defect of the focused current method, there is no concept of "orientation" in the measurement process, and the geological anomaly in front of the tunnel is generally analyzed as a whole, so even if the existence of geological anomalies is found, the specific orientation cannot be judged

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  • System and method for determining orientation of anomalous body on the basis of circumferential electrode scanning

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Embodiment Construction

[0012] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0013] figure 1 Shown is a schematic structural diagram of the system for judging the orientation of an abnormal body based on circumferential electrode scanning in the present invention, including multiple circumferential electrodes, a constant current drive circuit, a voltage measurement circuit, an extension cable and an anchor rod.

[0014] In the application process of the actual system, t...

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Abstract

The invention discloses a system and method for determining the orientation of an anomalous body on the basis of circumferential electrode scanning and belongs to the technical field of tunneling geological ahead monitoring. The system comprises multiple circumferential electrodes, a constant-current driving circuit, a voltage measuring circuit, an extended cable, and an anchor pole. The multiple circumferential electrodes are uniformly distributed on a tunnel wall a certain distance behind the shield of a tunnel boring machine. The constant-current driving circuit successively supplies constant current to the circumferential electrodes. The voltage measuring circuit acquires corresponding shield voltage. The orientation of the anomalous body can be accurately determined by the analysis of the voltage on the shield. The system is simple in structure and easy to be manually operated.

Description

technical field [0001] The invention belongs to the technical field of tunnel engineering geological prospecting, and more specifically relates to a system and method for judging the orientation of abnormal bodies based on circumferential electrode scanning. Background technique [0002] In 2002, Geo Company of Germany developed the BEAM (Bore-Tunneling Electrical Ahead Monitoring) system based on focused current method. Analyze the geological formations ahead. In China, the research on BEAM started relatively late, and more simulations were carried out. It was not until 2008 that someone used the same focused current method to detect ahead of the tunnel, supplemented by induced polarization analysis, to determine the size of the anomaly and the location in front of it. the approximate distance. However, due to the principle defect of the focused current method, there is no concept of "orientation" in the measurement process, and the geology in front of the tunnel is gener...

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Application Information

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IPC IPC(8): G01V3/26
Inventor 赵斌高昕星
Owner HUAZHONG UNIV OF SCI & TECH
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