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Bedrock fracture dominant channel detection method based on high-density electrical method

A high-density electrical method and dominant channel technology, applied in the field of bedrock crack research, can solve the problems of time-consuming model making, inability to carry out field-scale tests, and high production costs

Active Publication Date: 2021-06-08
HEFEI UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] However, this technology is a laboratory-scale test, and the production of the model is time-consuming and expensive. The use of alternative materials to replace the fracture-porous medium makes it impossible to conduct field-scale tests.

Method used

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  • Bedrock fracture dominant channel detection method based on high-density electrical method
  • Bedrock fracture dominant channel detection method based on high-density electrical method
  • Bedrock fracture dominant channel detection method based on high-density electrical method

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Experimental program
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Embodiment 1

[0110] The following steps are included in the detection of the dominant channels of bedrock fissures:

[0111] Step 1, at least one observation well 7 and one water injection well 4 are constructed in the bedrock 3 area, the distance between the observation well and the water injection well 4 is 1m, and then the water injection pipe 1 is installed above the water injection well 4;

[0112] In the observation well 7, 6 measuring ends of the distributed conductivity meter 6 are arranged at equal intervals from the mouth to the bottom in the vertical direction, and the distance between adjacent measuring ends is 0.5m; the installation depth of each measuring end is respectively 3.5m, 4.0m, 4.5m, 5.0m, 5.5m and 6.0m;

[0113] When actually setting each measurement terminal, considering the simplification of subsequent sampling, recording and data processing, the depth of the groundwater surface can be used as the starting point to arrange the measurement terminals downward; the d...

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Abstract

The invention discloses a bedrock fracture dominant channel detection method based on a high-density electrical method, and relates to the technical field of bedrock fracture research. The method comprises the following steps: monitoring instantaneous rock mass resistivity of each point in bedrock for multiple times in a monitoring period through a high-density electrical method instrument, calculating to obtain rock mass resistivity change rate of each point in the bedrock, and determining distribution points of fracture dominant channels according to distance and depth information corresponding to a peak point of the rock mass resistivity change rate; and finally, connecting the distribution points to obtain accurate fracture dominant channel form and spatial position information. The technical blank of field fracture dominant channel form detection is filled, the distributed conductivity meter is arranged in the observation well, the spatial position information of the fracture dominant channel is corrected through the depth corresponding to the peak point of the fluid conductivity change rate, and the accuracy of the fracture dominant channel detection result is ensured.

Description

technical field [0001] The invention relates to the technical field of bedrock fissure research, in particular to a method for detecting dominant channels of bedrock fissures. Background technique [0002] Bedrock fissure water is groundwater located in bedrock fissures, and it is also one of the most widely distributed groundwater types in my country. Bedrock fissure seepage is a phenomenon in which bedrock fissure water moves in bedrock fissures. This phenomenon has a great impact on the stability and safety of dams, slopes, underground caverns and other building structures, and is the main cause of geotechnical engineering disasters. factor. [0003] The dominant channel is the optimal flow channel for bedrock fissure water in the bedrock fissure seepage phenomenon. Its identification and description are the basis and key factors for engineering safety and groundwater resource management and evaluation in quality geotechnical engineering. The identification of dominant c...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01V3/00
CPCG01V3/00Y02A90/30
Inventor 钱家忠闫永帅马海春马雷骆乾坤邓亚平
Owner HEFEI UNIV OF TECH
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