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A method for considering the influence of surrounding rock anisotropy in the advance detection of resistivity method

An anisotropic and advanced detection technology, applied in the field of mine disaster detection and tunnel detection, can solve problems such as inaccurate prediction and data distortion, and achieve accurate and reliable results

Active Publication Date: 2022-07-15
UNIV OF SCI & TECH OF CHINA
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Problems solved by technology

[0003] The present invention proposes a method for predicting models that consider the influence of surrounding rock anisotropy in the advance detection of the resistivity method, which can solve the problem of the roadway advance detection resistivity method in the actual exploration application due to the existence of the anisotropy of the surrounding rock in the roadway. The problem of data distortion and inaccurate prediction

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  • A method for considering the influence of surrounding rock anisotropy in the advance detection of resistivity method
  • A method for considering the influence of surrounding rock anisotropy in the advance detection of resistivity method
  • A method for considering the influence of surrounding rock anisotropy in the advance detection of resistivity method

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[0023] In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments These are some embodiments of the present invention, but not all embodiments.

[0024] like image 3 As shown, the construction of the roadway fault model in the embodiment of the present invention includes the following steps:

[0025] Step (1) Design the size of the model. The scale of the entire model is 1000m×500m×1000m, the length of the tunnel is 200m×2m×2m, and the thickness of the fault is a=2m. The selection of the model boundary is the best one between the calculation time and the calculation memory. Balance, one power supply electrode is at infinity, another power supply electrode A is arranged in the tunn...

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Abstract

The invention proposes a method for considering the influence of surrounding rock anisotropy in the advance detection of resistivity method. Most of the existing prediction models of roadway advance detection by resistivity method are based on the isotropic assumption of the earth medium and simple physical model tests. However, the distribution of the resistivity anisotropy of the actual underground medium is complex and real. The present invention uses a statistical method to predict and evaluate the location of the water-bearing fault by simulating a large number of random surrounding rock anisotropy. This method combines the position of the abscissa of the apparent resistivity minimum value and obtains the prediction equation for predicting the position of the water-bearing fault according to the anisotropy coefficient of the surrounding rock of the tunnel measured by petrophysical experiments. The method based on the prediction model of surrounding rock anisotropy proposed by the present invention has instructive theoretical value for tunnel data interpretation.

Description

technical field [0001] The invention relates to the fields of tunnel detection and mine disaster detection, in particular to a method for considering the influence of surrounding rock anisotropy in the advance detection of resistivity method. Background technique [0002] A variety of methods have been developed for the advance detection of resistivity method, such as DC focusing method, three-pole advance detection method and so on. However, these methods are all based on the simple isotropy of earth medium resistivity, and the actual response effect is not good. In recent years, mine tunnel water disaster accidents have occurred frequently. Arbitrary distribution, resistivity anisotropy also exists objectively. Some scholars have proposed that real complex geological structures with obvious bedding planes show different degrees of anisotropy. For the traditional ground DC resistivity method, resistivity anisotropy has always been a hot issue in many geophysical exploratio...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/00G01V3/38
CPCG01V3/00G01V3/38
Inventor 胡代明岳明鑫吴小平杨晓冬
Owner UNIV OF SCI & TECH OF CHINA
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