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Method for researching progressive deterioration rule of rock

A rock and law technology, applied in the field of layered deterioration law research on rocks, can solve the non-quantitative study of the evolution law of the inner circle, cannot reflect the damage inhomogeneity of each layer of the rock sample, and cannot reflect the scanning layer. Inhomogeneity and other problems, to achieve the effect of saving operation time, accurate calculation and simple operation

Active Publication Date: 2020-04-17
CHINA THREE GORGES UNIV
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Problems solved by technology

[0003] ① Judging the degree of damage by analyzing the law of macroscopic parameters, although the deterioration law of the overall rock after the damage test can be obtained, it cannot reflect the inhomogeneity of damage at each layer of the rock sample
However, this method cannot reflect the damage contrast inside the rock sample. If the CT value is used as the basis for judgment, it cannot reflect the inhomogeneity of the scanning layer.
[0004] In addition, a certain number of freeze-thaw cycles causes the surface layer of the rock sample to peel off, but there is no quantitative study on the evolution of the inner circle before and after peeling off.

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  • Method for researching progressive deterioration rule of rock
  • Method for researching progressive deterioration rule of rock
  • Method for researching progressive deterioration rule of rock

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Embodiment Construction

[0063] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0064] A method for studying the law of layered deterioration of rocks, comprising the following steps:

[0065] Step 1): Select three groups of rock samples A, B, and C with the same shape and size, group A is the rock sample without the end surface of the circle, and groups B and C are the rock samples of the circle;

[0066] Step 2): If figure 1 As shown, the end face of the rock sample in group B is divided into m circles, and 5 circles are divided in this embodiment, and CT scanning analysis is performed before and after the rock damage test, and the average CT value of each ring is CT ave(m) The calculation formula is as follows:

[0067]

[0068] In the formula: s(m) is the area of ​​the mth circle; s(m-1) is the area of ​​the m-1th circle; CT(m) is the scanned CT value of the mth circle; CT(m-1) is the area of ​​the mth c...

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Abstract

The invention discloses a method for researching a progressive deterioration law of rock. The method comprises steps of carrying out regional subdivision of the cross section of a rock sample; scanning to obtain an initial state and a damaged CT average value CTave (m) of each layer; establishing a staged progressive freeze-thaw damage model; establishing the relationship between a CT value of therock sample without the layered layer, the elasticity modulus and the porosity; obtaining the elasticity modulus and porosity corresponding to the CT value of the layered rock sample in the step, andquantitatively illuminating the development and evolution law of progressive damage by combining the porosity change, elastic modulus damage rate change, mesoscopic pore change images and the like under the freeze-thaw cycle index. The method is advantaged in that the damage degree of each subdivision area of the rock sample can be accurately determined, and the evolution rule of each ring layerof the rock sample before and after surface spalling is judged.

Description

technical field [0001] The invention relates to the technical field of rock degradation analysis, in particular to a method for studying the law of layered degradation of rocks. Background technique [0002] With the deepening of scientific research, most of the damage analysis methods for rock samples now are to conduct damage tests on damaged rock samples and then conduct uniaxial compression tests, etc., and judge the degree of damage by analyzing the laws of macroscopic parameters. Or after the damage test, the brightness and darkness of the image after the CT scan and the size of the CT value are used to analyze the damage degree inside the rock, but there are the following deficiencies: [0003] ① Judging the degree of damage by analyzing the law of macroscopic parameters, although the deterioration law of the overall rock after the damage test can be obtained, it cannot reflect the inhomogeneity of damage at each layer of the rock sample. ② Contrast the CT image with...

Claims

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Application Information

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IPC IPC(8): G01N3/08G01N15/08G01N23/046G01N25/00
CPCG01N3/08G01N15/088G01N23/046G01N25/00G01N2203/0019G01N2203/0075G01N2203/0252
Inventor 刘杰张瀚何卓文段姚岑王芳陶鑫波骆浩包顺高素芳
Owner CHINA THREE GORGES UNIV
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