Comparison study on rock breaking characteristics of disc cutters under coupled static–dynamic loads and static loads
Rock cutting methods for disc cutters with coupled static–dynamic loads and static loads are explored and compared through rock breaking experiments to improve the TBM excavation efficiency. Results indicate that the rock breaking characteristics, including rock debris, cutting force, and rock break...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Académie des sciences
2023-01-01
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| Series: | Comptes Rendus. Mécanique |
| Subjects: | |
| Online Access: | https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.5802/crmeca.163/ |
| _version_ | 1811153866684628992 |
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| author | Lin, Laikuang Xia, Yimin Zhang, Xuhui Yi, Liang Fu, Jie |
| author_facet | Lin, Laikuang Xia, Yimin Zhang, Xuhui Yi, Liang Fu, Jie |
| author_sort | Lin, Laikuang |
| collection | DOAJ |
| description | Rock cutting methods for disc cutters with coupled static–dynamic loads and static loads are explored and compared through rock breaking experiments to improve the TBM excavation efficiency. Results indicate that the rock breaking characteristics, including rock debris, cutting force, and rock breaking efficiency, significantly varies with different cutting methods. The average size of rock fragmentation produced under coupled static–dynamic loads is 1.6 times larger than that under static loads. The cutting forces of disc cutter under the coupled static–dynamic loads are larger than those under static loads when the cutting depth $(h)$ is lower than 4 mm, whereas is contrary when $h$ exceeds 4 mm. The specific energy of disc cutter under the coupled static–dynamic load is approximately 1.5 times smaller than that under the static load, indicating the cutting method with the coupled static–dynamic load can significantly improve the cutting performance. There is an optimal cutter spacing $(S)$ for the cutter under each cutting method. The optimal $S$ under the coupled static–dynamic loads is larger than that with static loads. This study provides new insights into improving the tunneling efficiency in high-strength rock conditions. |
| first_indexed | 2024-03-11T16:15:04Z |
| format | Article |
| id | doaj.art-4b94d1c261cb478ea75789a8ba6c1cc5 |
| institution | Directory Open Access Journal |
| issn | 1873-7234 |
| language | English |
| last_indexed | 2024-03-11T16:15:04Z |
| publishDate | 2023-01-01 |
| publisher | Académie des sciences |
| record_format | Article |
| series | Comptes Rendus. Mécanique |
| spelling | doaj.art-4b94d1c261cb478ea75789a8ba6c1cc52023-10-24T14:21:13ZengAcadémie des sciencesComptes Rendus. Mécanique1873-72342023-01-01351G111510.5802/crmeca.16310.5802/crmeca.163Comparison study on rock breaking characteristics of disc cutters under coupled static–dynamic loads and static loadsLin, Laikuang0https://orcid.org/0000-0001-9331-3302Xia, Yimin1https://orcid.org/0000-0001-6174-0377Zhang, Xuhui2https://orcid.org/0000-0002-4518-9754Yi, Liang3Fu, Jie4https://orcid.org/0000-0002-8998-0513College of Mechanical and Electrical Engineering, State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, ChinaCollege of Mechanical and Electrical Engineering, State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, ChinaCollege of Mechanical and Electrical Engineering, State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, ChinaCollege of Mechanical and Electrical Engineering, State Key Laboratory of High Performance Complex Manufacturing, Central South University, Changsha 410083, ChinaSchool of Materials Science and Engineering, Central South University, Changsha 410083, ChinaRock cutting methods for disc cutters with coupled static–dynamic loads and static loads are explored and compared through rock breaking experiments to improve the TBM excavation efficiency. Results indicate that the rock breaking characteristics, including rock debris, cutting force, and rock breaking efficiency, significantly varies with different cutting methods. The average size of rock fragmentation produced under coupled static–dynamic loads is 1.6 times larger than that under static loads. The cutting forces of disc cutter under the coupled static–dynamic loads are larger than those under static loads when the cutting depth $(h)$ is lower than 4 mm, whereas is contrary when $h$ exceeds 4 mm. The specific energy of disc cutter under the coupled static–dynamic load is approximately 1.5 times smaller than that under the static load, indicating the cutting method with the coupled static–dynamic load can significantly improve the cutting performance. There is an optimal cutter spacing $(S)$ for the cutter under each cutting method. The optimal $S$ under the coupled static–dynamic loads is larger than that with static loads. This study provides new insights into improving the tunneling efficiency in high-strength rock conditions.https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.5802/crmeca.163/TBMDisc cutterCoupled static–dynamic loadsRock breaking efficiencyCutting force |
| spellingShingle | Lin, Laikuang Xia, Yimin Zhang, Xuhui Yi, Liang Fu, Jie Comparison study on rock breaking characteristics of disc cutters under coupled static–dynamic loads and static loads Comptes Rendus. Mécanique TBM Disc cutter Coupled static–dynamic loads Rock breaking efficiency Cutting force |
| title | Comparison study on rock breaking characteristics of disc cutters under coupled static–dynamic loads and static loads |
| title_full | Comparison study on rock breaking characteristics of disc cutters under coupled static–dynamic loads and static loads |
| title_fullStr | Comparison study on rock breaking characteristics of disc cutters under coupled static–dynamic loads and static loads |
| title_full_unstemmed | Comparison study on rock breaking characteristics of disc cutters under coupled static–dynamic loads and static loads |
| title_short | Comparison study on rock breaking characteristics of disc cutters under coupled static–dynamic loads and static loads |
| title_sort | comparison study on rock breaking characteristics of disc cutters under coupled static dynamic loads and static loads |
| topic | TBM Disc cutter Coupled static–dynamic loads Rock breaking efficiency Cutting force |
| url | https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.5802/crmeca.163/ |
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