Study of an Anisotropic Cohesion Weakening–Friction Strengthening Model for Bedded Shale.
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| Title: | Study of an Anisotropic Cohesion Weakening–Friction Strengthening Model for Bedded Shale. |
|---|---|
| Authors: | Zhou, Wenjing1 (AUTHOR), Xie, Yuan1 (AUTHOR), Jia, Suizi1 (AUTHOR) 2016010023@cugb.edu.cn, Qin, Yan1 (AUTHOR) qinyancugb@cugb.edu.cn |
| Source: | Rock Mechanics & Rock Engineering. May2025, Vol. 58 Issue 5, p5875-5887. 13p. |
| Subjects: | Internal friction, Software verification, Material plasticity, Mechanical models, Resource exploitation, Cohesion |
| Abstract: | In the process of underground cavern excavation and resource exploitation, cohesion and internal friction angle of disturbed rocks vary with increasing plastic strain. Some scholars have established relevant evolution models of cohesion weakening and friction strengthening for isotropic rocks. However, the evolution of cohesion and internal friction angle of bedded shale after disturbance exhibits significant anisotropy. Therefore, based on the laboratory test data of shale specimens in the related literature, this research introduces an equivalent plastic internal variable to unify the critical equivalent plastic strain of specimens under different confining pressures. The evolutions of cohesion and internal friction angle for different bedding dip angles with the equivalent plastic internal variable are analyzed, and a modified anisotropic cohesion weakening–friction strengthening (A-CWFS) model is established. The established model is integrated into FLAC3D numerical simulation software for verification. By comparing the simulation results with the laboratory test data, it is found that the simulation results can effectively express the characteristics of each plastic deformation stage of the specimens. This shows that the modified A-CWFS model can describe the evolutions of cohesion and internal friction angle of bedded shale with different bedding dip angles and the proposed method can be used for the analysis of the other bedded rocks in future. Highlights: The evolutions of cohesion and internal friction angle throughout the process of shale rock specimen damage are studied in detail by analyzing the changing characteristics of the complete stress‒strain curve at different stages. The anisotropy of shale rock specimens throughout the damage process is analyzed according to the difference in cohesion and internal friction angle at different bedding dip angles. Based on the anisotropy of the full stress‒strain relation of bedded shale, a modified anisotropic cohesion weakening–friction strengthening model is established. [ABSTRACT FROM AUTHOR] |
| Copyright of Rock Mechanics & Rock Engineering is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
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| Header | DbId: egs DbLabel: Engineering Source An: 184916048 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Study of an Anisotropic Cohesion Weakening–Friction Strengthening Model for Bedded Shale. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Zhou%2C+Wenjing%22">Zhou, Wenjing</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Xie%2C+Yuan%22">Xie, Yuan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jia%2C+Suizi%22">Jia, Suizi</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> 2016010023@cugb.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Qin%2C+Yan%22">Qin, Yan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> qinyancugb@cugb.edu.cn</i> – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Rock+Mechanics+%26+Rock+Engineering%22">Rock Mechanics & Rock Engineering</searchLink>. May2025, Vol. 58 Issue 5, p5875-5887. 13p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Internal+friction%22">Internal friction</searchLink><br /><searchLink fieldCode="DE" term="%22Software+verification%22">Software verification</searchLink><br /><searchLink fieldCode="DE" term="%22Material+plasticity%22">Material plasticity</searchLink><br /><searchLink fieldCode="DE" term="%22Mechanical+models%22">Mechanical models</searchLink><br /><searchLink fieldCode="DE" term="%22Resource+exploitation%22">Resource exploitation</searchLink><br /><searchLink fieldCode="DE" term="%22Cohesion%22">Cohesion</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: In the process of underground cavern excavation and resource exploitation, cohesion and internal friction angle of disturbed rocks vary with increasing plastic strain. Some scholars have established relevant evolution models of cohesion weakening and friction strengthening for isotropic rocks. However, the evolution of cohesion and internal friction angle of bedded shale after disturbance exhibits significant anisotropy. Therefore, based on the laboratory test data of shale specimens in the related literature, this research introduces an equivalent plastic internal variable to unify the critical equivalent plastic strain of specimens under different confining pressures. The evolutions of cohesion and internal friction angle for different bedding dip angles with the equivalent plastic internal variable are analyzed, and a modified anisotropic cohesion weakening–friction strengthening (A-CWFS) model is established. The established model is integrated into FLAC3D numerical simulation software for verification. By comparing the simulation results with the laboratory test data, it is found that the simulation results can effectively express the characteristics of each plastic deformation stage of the specimens. This shows that the modified A-CWFS model can describe the evolutions of cohesion and internal friction angle of bedded shale with different bedding dip angles and the proposed method can be used for the analysis of the other bedded rocks in future. Highlights: The evolutions of cohesion and internal friction angle throughout the process of shale rock specimen damage are studied in detail by analyzing the changing characteristics of the complete stress‒strain curve at different stages. The anisotropy of shale rock specimens throughout the damage process is analyzed according to the difference in cohesion and internal friction angle at different bedding dip angles. Based on the anisotropy of the full stress‒strain relation of bedded shale, a modified anisotropic cohesion weakening–friction strengthening model is established. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Rock Mechanics & Rock Engineering is the property of Springer Nature and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1007/s00603-024-04306-6 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: 5875 Subjects: – SubjectFull: Internal friction Type: general – SubjectFull: Software verification Type: general – SubjectFull: Material plasticity Type: general – SubjectFull: Mechanical models Type: general – SubjectFull: Resource exploitation Type: general – SubjectFull: Cohesion Type: general Titles: – TitleFull: Study of an Anisotropic Cohesion Weakening–Friction Strengthening Model for Bedded Shale. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Zhou, Wenjing – PersonEntity: Name: NameFull: Xie, Yuan – PersonEntity: Name: NameFull: Jia, Suizi – PersonEntity: Name: NameFull: Qin, Yan IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 05 Text: May2025 Type: published Y: 2025 Identifiers: – Type: issn-print Value: 07232632 Numbering: – Type: volume Value: 58 – Type: issue Value: 5 Titles: – TitleFull: Rock Mechanics & Rock Engineering Type: main |
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