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High-resolution three-dimensional resistivity CT (Computed Tomography) imaging advanced prediction system and method of underground engineering

An underground engineering and high-resolution technology, which is applied in radio wave measurement system, electric/magnetic exploration, geophysical measurement, etc., can solve the problem of inability to realize deep fine and high-resolution detection, inability to realize three-dimensional precise positioning of geological anomalies, difficult Realize three-dimensional exploration of geological conditions and other issues, achieve reliable results, optimize the initial model, and achieve high precision effects

Active Publication Date: 2012-10-31
山东百廿慧通工程科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] To sum up, there are two problems in the advanced geological prediction of underground engineering as follows: ① The detection accuracy and resolution decrease with the increase of the exploration depth, and it is impossible to realize the fine and high-resolution detection in the deep; ② It is difficult to realize the existing prediction technology Three-dimensional detection of local geological conditions, unable to achieve three-dimensional precise positioning of geological anomalies

Method used

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  • High-resolution three-dimensional resistivity CT (Computed Tomography) imaging advanced prediction system and method of underground engineering
  • High-resolution three-dimensional resistivity CT (Computed Tomography) imaging advanced prediction system and method of underground engineering
  • High-resolution three-dimensional resistivity CT (Computed Tomography) imaging advanced prediction system and method of underground engineering

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] Embodiment 1 system and method

[0048] Such as figure 1 , figure 2 As shown, a high-resolution three-dimensional resistivity CT imaging advanced prediction system for underground engineering under complex geological conditions, which vertically drills a pair of parallel boreholes of equal depth (borehole 1 and borehole 2) on the working face 1 of the tunnel underground engineering Hole 2 3), the electrode system delivery and quick coupling devices are arranged in the two boreholes, such as image 3 shown. The electrode system delivery and quick coupling device in deep and long boreholes is composed of three parts: a self-retractable spring electrode 5 , a PE plastic outer sleeve 9 and a plexiglass rotatable inner sleeve 10 . The self-retractable spring electrode 5 is composed of five parts: an electrode casing 14 , a spring 15 , a metal electrode 16 , a ratchet structure 17 and an electrode cap 18 . The multi-core cable 4 is designed with a threaded threaded hole ...

Embodiment 2

[0058] Embodiment 2 Another system and method

[0059] As another electrode delivery method of the electrode of the present invention, the electrode can be fixed on the PVC guide rod in the order of inside and outside, and then sent to the predetermined position of the drill hole. Other design ideas and structures are the same as in Embodiment 1.

[0060] The specific steps of the advance forecasting method are as follows:

[0061] A. First, drill a pair of parallel boreholes with equal depth l vertically on the working surface of underground engineering such as tunnels (refer to figure 1 ), the depth depends on the survey requirements, and the distance between the two holes is d; after the drilling is formed, the electrodes are fixed on the PVC guide rod in the order of first inside and then outside, and then sent to the predetermined position of the drill hole, two drill holes Arrange n electrodes with equal electrode distance △x; arrange m electrodes with equal electrode ...

Embodiment 3

[0067] Example 3 Electrode delivery and quick coupling device

[0068] Such as image 3 , Figure 4 As shown, an electrode delivery and quick coupling device for underground engineering, which includes: (1) PE plastic outer sleeve 9, with a conductive adhesive loading tank 13 filled with conductive adhesive; (2) plexiglass rotatable inner sleeve The tube 10 includes a rotatable sleeve. After the sleeve is rotated, it can have a space connecting the conductive adhesive loading groove 13 and the inside of the sleeve, and the outer end of the sleeve is provided with a rotating handle 11, and the plexiglass inner sleeve can be rotated The inside of 10 passes through a multi-core cable 4 used as a money tester; (3) several self-retractable spring electrodes 5, each self-retractable spring electrode 5 includes an electrode shell 14, and a metal electrode 16 is arranged inside the electrode shell 14, The metal electrode 16 is connected to the multi-core cable 4, and also includes a...

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Abstract

The invention discloses a high-resolution three-dimensional resistivity CT (Computed Tomography) imaging advanced prediction system and method of underground engineering. According to the system and the method, a three-dimensional measuring mode of parallel double drilled holes and orthogonal measuring liens is designed; a multiple-coverage, fully automatic and fully combined free data acquisition mode is adopted; the conventional electrical process data acquisition mode is improved, so that richer data quantity can be achieved; a three-dimensional total space resistivity data inversion interception method is performed, so that a more accurate three-dimensional imaging effect can be obtained, a three-dimensional resistivity fine structure of a geologic body in a certain range in front of a working face is obtained, and high-resolution accurate imaging of an abnormal geologic body can be realized; and particularly, the resolution of a deep part is obviously improved, the bottleneck that only a local region can be detected by advanced bore is broken through, the defects of low accuracy and resolution of the conventional advanced prediction geophysical exploitation method are overcome, and a feasible approach is provided for realizing high-resolution accurate advanced prediction of construction of the underground engineering.

Description

technical field [0001] The invention relates to a high-resolution imaging advanced geological prediction method based on resistivity CT technology under complex geological conditions of underground engineering such as tunnels or tunnels, in particular to a method for three-dimensional observation in tunnels or tunnels using resistivity CT technology and three-dimensional overlay data collection, and perform three-dimensional full-space resistivity inversion and interpretation on the detection results, so as to realize the method of fine exploration of the geological conditions in front of the working face. Background technique [0002] With the acceleration of my country's infrastructure construction process, more long tunnels, tunnels and other underground projects will be built in the fields of transportation, water conservancy and hydropower, and mineral resource development. These underground projects generally have significant characteristics such as deep burial, long t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/00
Inventor 刘斌李术才刘征宇许新骥聂利超林春金宋杰李树忱张庆松
Owner 山东百廿慧通工程科技有限公司
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