Morphological anisotropy of shear failure surfaces of granite rock bridges
Abstract Rock bridges are critical for the stability of rock masses and often experience shear failure under natural conditions. As a manifestation of the failure mechanisms of rock bridges, we investigate the morphology of failure surfaces created by direct shearing on granite rock bridges with var...
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| Format: | Article |
| Language: | English |
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Springer
2025-06-01
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| Series: | Geomechanics and Geophysics for Geo-Energy and Geo-Resources |
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| Online Access: | https://doi.org/10.1007/s40948-025-00974-y |
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| author | Guangming Luo Shengwen Qi Bowen Zheng Wei Lu |
| author_facet | Guangming Luo Shengwen Qi Bowen Zheng Wei Lu |
| author_sort | Guangming Luo |
| collection | DOAJ |
| description | Abstract Rock bridges are critical for the stability of rock masses and often experience shear failure under natural conditions. As a manifestation of the failure mechanisms of rock bridges, we investigate the morphology of failure surfaces created by direct shearing on granite rock bridges with varying initial persistence rates. The failure surfaces were scanned using a 3D laser scanner, and the roughness of the profiles was quantified with the Hurst exponent. To describe the morphological anisotropy, we introduced an isotropy index. Our results indicate that the failure surfaces display significant morphological anisotropy, featuring rougher profiles in the direction parallel to the shear for samples with initial persistence rates exceeding 20%. The morphological anisotropy diminishes with decreasing persistence rates and shows an initial decrease followed by a significant increase during the progressive failure of rock bridges. We suggest through the morphological characteristics of the failure surfaces that a large slip is necessary to develop the typical morphology of mature faults documented at outcrop scales. |
| format | Article |
| id | doaj-art-dbee3c5daa3542d09c7a51188dc26f0b |
| institution | OA Journals |
| issn | 2363-8419 2363-8427 |
| language | English |
| publishDate | 2025-06-01 |
| publisher | Springer |
| record_format | Article |
| series | Geomechanics and Geophysics for Geo-Energy and Geo-Resources |
| spelling | doaj-art-dbee3c5daa3542d09c7a51188dc26f0b2025-08-20T02:05:42ZengSpringerGeomechanics and Geophysics for Geo-Energy and Geo-Resources2363-84192363-84272025-06-0111111210.1007/s40948-025-00974-yMorphological anisotropy of shear failure surfaces of granite rock bridgesGuangming Luo0Shengwen Qi1Bowen Zheng2Wei Lu3State Key Laboratory of Lithospheric and Environmental Coevolution, Institute of Geology and Geophysics, Chinese Academy of SciencesState Key Laboratory of Lithospheric and Environmental Coevolution, Institute of Geology and Geophysics, Chinese Academy of SciencesState Key Laboratory of Lithospheric and Environmental Coevolution, Institute of Geology and Geophysics, Chinese Academy of SciencesState Key Laboratory of Lithospheric and Environmental Coevolution, Institute of Geology and Geophysics, Chinese Academy of SciencesAbstract Rock bridges are critical for the stability of rock masses and often experience shear failure under natural conditions. As a manifestation of the failure mechanisms of rock bridges, we investigate the morphology of failure surfaces created by direct shearing on granite rock bridges with varying initial persistence rates. The failure surfaces were scanned using a 3D laser scanner, and the roughness of the profiles was quantified with the Hurst exponent. To describe the morphological anisotropy, we introduced an isotropy index. Our results indicate that the failure surfaces display significant morphological anisotropy, featuring rougher profiles in the direction parallel to the shear for samples with initial persistence rates exceeding 20%. The morphological anisotropy diminishes with decreasing persistence rates and shows an initial decrease followed by a significant increase during the progressive failure of rock bridges. We suggest through the morphological characteristics of the failure surfaces that a large slip is necessary to develop the typical morphology of mature faults documented at outcrop scales.https://doi.org/10.1007/s40948-025-00974-yRock bridgeShear failure surfaceMorphological anisotropyPersistence rateProgressive failure |
| spellingShingle | Guangming Luo Shengwen Qi Bowen Zheng Wei Lu Morphological anisotropy of shear failure surfaces of granite rock bridges Geomechanics and Geophysics for Geo-Energy and Geo-Resources Rock bridge Shear failure surface Morphological anisotropy Persistence rate Progressive failure |
| title | Morphological anisotropy of shear failure surfaces of granite rock bridges |
| title_full | Morphological anisotropy of shear failure surfaces of granite rock bridges |
| title_fullStr | Morphological anisotropy of shear failure surfaces of granite rock bridges |
| title_full_unstemmed | Morphological anisotropy of shear failure surfaces of granite rock bridges |
| title_short | Morphological anisotropy of shear failure surfaces of granite rock bridges |
| title_sort | morphological anisotropy of shear failure surfaces of granite rock bridges |
| topic | Rock bridge Shear failure surface Morphological anisotropy Persistence rate Progressive failure |
| url | https://doi.org/10.1007/s40948-025-00974-y |
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