Breakage Mechanism of Layered Sandstone Penetrated by TBM Disc Cutter
In this paper, the breakage mechanism of layered sandstone subjected to the TBM disc cutter was investigated. A series of typical layered sandstone specimens were prepared for true triaxial compression tests in the laboratory to simulate the disc cutter action at the tunnel face, and an acoustic emi...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/6618234 |
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| author | Yingji Bao Jianlong Cheng Binsong Jiang |
| author_facet | Yingji Bao Jianlong Cheng Binsong Jiang |
| author_sort | Yingji Bao |
| collection | DOAJ |
| description | In this paper, the breakage mechanism of layered sandstone subjected to the TBM disc cutter was investigated. A series of typical layered sandstone specimens were prepared for true triaxial compression tests in the laboratory to simulate the disc cutter action at the tunnel face, and an acoustic emission (AE) system was used to monitor the breaking process during the penetration tests. Furthermore, a DV recorder was employed to capture the surface deformation. Then, the failure specimens were scanned by high resolution X-ray micro-CT. The results show that the failure mode of layered sandstone in terms of cracking transforms into local crushing with increasing confining stress. The propagation pattern of the cracks varies with the bedding inclination, which is distinctly different from intact rock. The results also indicate that the peak force presents linear variation with the confining stress and an increasing trend with the bedding inclination at the first penetration, and the failure mode of the second penetration is mainly related to the broken status from the first penetration. |
| format | Article |
| id | doaj-art-5ee91330f7d14479b2b1c54e448366da |
| institution | OA Journals |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-5ee91330f7d14479b2b1c54e448366da2025-08-20T02:05:09ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/66182346618234Breakage Mechanism of Layered Sandstone Penetrated by TBM Disc CutterYingji Bao0Jianlong Cheng1Binsong Jiang2State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaIn this paper, the breakage mechanism of layered sandstone subjected to the TBM disc cutter was investigated. A series of typical layered sandstone specimens were prepared for true triaxial compression tests in the laboratory to simulate the disc cutter action at the tunnel face, and an acoustic emission (AE) system was used to monitor the breaking process during the penetration tests. Furthermore, a DV recorder was employed to capture the surface deformation. Then, the failure specimens were scanned by high resolution X-ray micro-CT. The results show that the failure mode of layered sandstone in terms of cracking transforms into local crushing with increasing confining stress. The propagation pattern of the cracks varies with the bedding inclination, which is distinctly different from intact rock. The results also indicate that the peak force presents linear variation with the confining stress and an increasing trend with the bedding inclination at the first penetration, and the failure mode of the second penetration is mainly related to the broken status from the first penetration.http://dx.doi.org/10.1155/2021/6618234 |
| spellingShingle | Yingji Bao Jianlong Cheng Binsong Jiang Breakage Mechanism of Layered Sandstone Penetrated by TBM Disc Cutter Shock and Vibration |
| title | Breakage Mechanism of Layered Sandstone Penetrated by TBM Disc Cutter |
| title_full | Breakage Mechanism of Layered Sandstone Penetrated by TBM Disc Cutter |
| title_fullStr | Breakage Mechanism of Layered Sandstone Penetrated by TBM Disc Cutter |
| title_full_unstemmed | Breakage Mechanism of Layered Sandstone Penetrated by TBM Disc Cutter |
| title_short | Breakage Mechanism of Layered Sandstone Penetrated by TBM Disc Cutter |
| title_sort | breakage mechanism of layered sandstone penetrated by tbm disc cutter |
| url | http://dx.doi.org/10.1155/2021/6618234 |
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