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 is lower than 4 mm, whereas is contrary when 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 for the cutter under each cutting method. The optimal 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.
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@article{CRMECA_2023__351_G1_1_0,
author = {Laikuang Lin and Yimin Xia and Xuhui Zhang and Liang Yi and Jie Fu},
title = {Comparison study on rock breaking characteristics of disc cutters under coupled static{\textendash}dynamic loads and static loads},
journal = {Comptes Rendus. M\'ecanique},
pages = {1--15},
publisher = {Acad\'emie des sciences, Paris},
volume = {351},
year = {2023},
doi = {10.5802/crmeca.163},
language = {en},
}
TY - JOUR AU - Laikuang Lin AU - Yimin Xia AU - Xuhui Zhang AU - Liang Yi AU - Jie Fu TI - Comparison study on rock breaking characteristics of disc cutters under coupled static–dynamic loads and static loads JO - Comptes Rendus. Mécanique PY - 2023 SP - 1 EP - 15 VL - 351 PB - Académie des sciences, Paris DO - 10.5802/crmeca.163 LA - en ID - CRMECA_2023__351_G1_1_0 ER -
%0 Journal Article %A Laikuang Lin %A Yimin Xia %A Xuhui Zhang %A Liang Yi %A Jie Fu %T Comparison study on rock breaking characteristics of disc cutters under coupled static–dynamic loads and static loads %J Comptes Rendus. Mécanique %D 2023 %P 1-15 %V 351 %I Académie des sciences, Paris %R 10.5802/crmeca.163 %G en %F CRMECA_2023__351_G1_1_0
Laikuang Lin; Yimin Xia; Xuhui Zhang; Liang Yi; Jie Fu. Comparison study on rock breaking characteristics of disc cutters under coupled static–dynamic loads and static loads. Comptes Rendus. Mécanique, Volume 351 (2023), pp. 1-15. doi : 10.5802/crmeca.163. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.5802/crmeca.163/
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