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A Method for Studying the Law of Layered Deterioration of Rocks

A technology of rock and law, applied in the field of stratified degradation law research on rocks, can solve the problem of non-quantitative research on the evolution law of internal circles, unable to reflect the unevenness of damage at each layer of rock samples, and unable to reflect the damage of rock samples Contrast and other problems to achieve the effect of saving operation time and simple operation

Active Publication Date: 2022-04-22
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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  • A Method for Studying the Law of Layered Deterioration of Rocks

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Embodiment Construction

[0064] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0065] A method for studying the progressive deterioration law of rocks, which comprises the following steps:

[0066] Step 1): select three groups of rock samples A, B, and C with the same shape and size, group A is the rock sample with undivided layers on the end face, and groups B and C are the rock samples with divided layers;

[0067] Step 2): as figure 1 As shown, the end face of the rock sample in group B is divided into m circles. In this example, 5 circles are divided. CT scanning analysis was carried out before and after the rock damage test, and the average CT value of each ring was CT ave(m) The calculation formula is as follows:

[0068]

[0069] 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 Scanning CT va...

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Abstract

The invention discloses a method for studying the law of layered deterioration of rocks, which includes: subdividing the rock sample cross-section; scanning to obtain the initial state and the average CT value C of each layer after damage Tave(m) ; Establish a layered layered freeze-thaw damage model; establish the relationship between the CT value of the unseparated rock sample and the elastic modulus and porosity; obtain the elastic modulus and porosity corresponding to the CT value of the layered rock sample in the step Combining the porosity change, elastic modulus damage rate change, and mesoscopic pore change images under the number of freeze-thaw cycles, the development and evolution law of layered damage can be quantitatively clarified; the invention can accurately determine the damage degree of each subdivision area of ​​the rock sample , and judge the evolution law of each circle layer of the rock sample before and after the surface spalling.

Description

technical field [0001] The invention relates to the technical field of rock deterioration analysis, in particular to a method for researching the stratified deterioration law of rocks. Background technique [0002] With the deepening of scientific research, most of the current methods for damage analysis of rock samples are to perform damage tests on damaged rock samples and then perform uniaxial compression tests. Or after the damage test, the brightness and darkness of the image after CT scan and the size of the CT value can be used to analyze the damage degree inside the rock, but there are the following shortcomings: [0003] ①By analyzing the law of macroscopic parameters to judge the damage degree, although the deterioration law after the overall damage test of the rock can be obtained, it cannot reflect the damage inhomogeneity of each layer of the rock sample. ②Contrast the CT image with the naked eye; in the CT scan image of a certain layer of the rock, the brighte...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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