Acoustic Emission Location Accuracy and Spatial Evolution Characteristics of Granite Fracture in Complex Stress Conditions.
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| Title: | Acoustic Emission Location Accuracy and Spatial Evolution Characteristics of Granite Fracture in Complex Stress Conditions. |
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| Authors: | Dong, Longjun1 (AUTHOR), Yang, Longbin1 (AUTHOR), Chen, Yongchao1 (AUTHOR) cyc195511015@csu.edu.cn |
| Source: | Rock Mechanics & Rock Engineering. Feb2023, Vol. 56 Issue 2, p1113-1130. 18p. |
| Subjects: | Stress fractures (Orthopedics), Granite, Acoustic emission, Rock deformation, Microcracks |
| Abstract: | Microseismic/acoustic emission (MS/AE) location technology is a powerful means to study the spatial evolution characteristics of rock fracture and early warning of geological hazards. This paper investigated the variation in MS/AE location accuracy and the spatial evolution characteristics of granite fracture in complex stress conditions by using the velocity-free MS/AE source location method. Results show that the variation of wave velocity caused by granite fracture is a key factor for the variation of location accuracy. It is expected to improve the location accuracy by dynamically correcting the iterative wave velocity. The evolution process and results of granite microcracks in uniaxial and biaxial stress conditions show consistency and difference. The consistency is that the microcracks start from the edges and corners at both ends of the rock and gradually develop to the central side of the rock. The distribution of AE events changes from scattered to clustered, nucleated, and finally to banded distribution. The difference is that the advance of rock damage strain point and the macroscopic fracture surfaces are mostly perpendicular to the minimum principal stress direction in biaxial stress conditions. This paper is not only a useful supplement to the MS/AE location methods and theories, but also provides a reference for the disaster-causing mechanism of rock instability as well as disaster prevention and control. Highlights: The variation of wave velocity caused by granite fracture is a key factor for the variation of location accuracy. The microcracks induced by stress in granite fracture start from the edges and corners and gradually develop to the central side of the rock. Stress conditions could significantly affect the damage strain point and the final morphology of cracks in granite. [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: 162076214 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Acoustic Emission Location Accuracy and Spatial Evolution Characteristics of Granite Fracture in Complex Stress Conditions. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Dong%2C+Longjun%22">Dong, Longjun</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Yang%2C+Longbin%22">Yang, Longbin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Yongchao%22">Chen, Yongchao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> cyc195511015@csu.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>. Feb2023, Vol. 56 Issue 2, p1113-1130. 18p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Stress+fractures+%28Orthopedics%29%22">Stress fractures (Orthopedics)</searchLink><br /><searchLink fieldCode="DE" term="%22Granite%22">Granite</searchLink><br /><searchLink fieldCode="DE" term="%22Acoustic+emission%22">Acoustic emission</searchLink><br /><searchLink fieldCode="DE" term="%22Rock+deformation%22">Rock deformation</searchLink><br /><searchLink fieldCode="DE" term="%22Microcracks%22">Microcracks</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Microseismic/acoustic emission (MS/AE) location technology is a powerful means to study the spatial evolution characteristics of rock fracture and early warning of geological hazards. This paper investigated the variation in MS/AE location accuracy and the spatial evolution characteristics of granite fracture in complex stress conditions by using the velocity-free MS/AE source location method. Results show that the variation of wave velocity caused by granite fracture is a key factor for the variation of location accuracy. It is expected to improve the location accuracy by dynamically correcting the iterative wave velocity. The evolution process and results of granite microcracks in uniaxial and biaxial stress conditions show consistency and difference. The consistency is that the microcracks start from the edges and corners at both ends of the rock and gradually develop to the central side of the rock. The distribution of AE events changes from scattered to clustered, nucleated, and finally to banded distribution. The difference is that the advance of rock damage strain point and the macroscopic fracture surfaces are mostly perpendicular to the minimum principal stress direction in biaxial stress conditions. This paper is not only a useful supplement to the MS/AE location methods and theories, but also provides a reference for the disaster-causing mechanism of rock instability as well as disaster prevention and control. Highlights: The variation of wave velocity caused by granite fracture is a key factor for the variation of location accuracy. The microcracks induced by stress in granite fracture start from the edges and corners and gradually develop to the central side of the rock. Stress conditions could significantly affect the damage strain point and the final morphology of cracks in granite. [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/s00603-022-03124-y Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 18 StartPage: 1113 Subjects: – SubjectFull: Stress fractures (Orthopedics) Type: general – SubjectFull: Granite Type: general – SubjectFull: Acoustic emission Type: general – SubjectFull: Rock deformation Type: general – SubjectFull: Microcracks Type: general Titles: – TitleFull: Acoustic Emission Location Accuracy and Spatial Evolution Characteristics of Granite Fracture in Complex Stress Conditions. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Dong, Longjun – PersonEntity: Name: NameFull: Yang, Longbin – PersonEntity: Name: NameFull: Chen, Yongchao IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 02 Text: Feb2023 Type: published Y: 2023 Identifiers: – Type: issn-print Value: 07232632 Numbering: – Type: volume Value: 56 – Type: issue Value: 2 Titles: – TitleFull: Rock Mechanics & Rock Engineering Type: main |
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