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Three-Dimensional Stability of Cyclical Footage Area in Tunnel Face
https://orcid.org/https://orcid.org/0000-0003-0604-1818
https://orcid.org/https://orcid.org/0000-0002-7878-0751
https://orcid.org/https://orcid.org/0000-0002-9073-6745
https://orcid.org/https://orcid.org/0000-0001-9196-9439
Based on the theory of limit and the unified strength theory, the three-dimensional failure pattern and the corresponding velocity field on the heading face for cyclical footage are proposed, considering the influence of the cyclical footage and the intermediate principle stress on the heading face stability. Addition, the influence of various parameters on the heading face stability is analyzed. The present study shows that the first increase in internal friction angle (lower than 25°) can promote the heading face stability. Then, the increase in the cohesion can promote the stability when the internal friction angle is higher than 25°. In addition, for the relatively intact instead of the poor surrounding rock, the promotion of the stress conditions of the heading face, caused by by the intermediate principle stress, indicates that the Mohr-Coulomb criterion is conservative.
Three-Dimensional Stability of Cyclical Footage Area in Tunnel Face
https://orcid.org/https://orcid.org/0000-0003-0604-1818
https://orcid.org/https://orcid.org/0000-0002-7878-0751
https://orcid.org/https://orcid.org/0000-0002-9073-6745
https://orcid.org/https://orcid.org/0000-0001-9196-9439
Based on the theory of limit and the unified strength theory, the three-dimensional failure pattern and the corresponding velocity field on the heading face for cyclical footage are proposed, considering the influence of the cyclical footage and the intermediate principle stress on the heading face stability. Addition, the influence of various parameters on the heading face stability is analyzed. The present study shows that the first increase in internal friction angle (lower than 25°) can promote the heading face stability. Then, the increase in the cohesion can promote the stability when the internal friction angle is higher than 25°. In addition, for the relatively intact instead of the poor surrounding rock, the promotion of the stress conditions of the heading face, caused by by the intermediate principle stress, indicates that the Mohr-Coulomb criterion is conservative.
Three-Dimensional Stability of Cyclical Footage Area in Tunnel Face
https://orcid.org/https://orcid.org/0000-0003-0604-1818
https://orcid.org/https://orcid.org/0000-0002-7878-0751
https://orcid.org/https://orcid.org/0000-0002-9073-6745
https://orcid.org/https://orcid.org/0000-0001-9196-9439
Based on the theory of limit and the unified strength theory, the three-dimensional failure pattern and the corresponding velocity field on the heading face for cyclical footage are proposed, considering the influence of the cyclical footage and the intermediate principle stress on the heading face stability. Addition, the influence of various parameters on the heading face stability is analyzed. The present study shows that the first increase in internal friction angle (lower than 25°) can promote the heading face stability. Then, the increase in the cohesion can promote the stability when the internal friction angle is higher than 25°. In addition, for the relatively intact instead of the poor surrounding rock, the promotion of the stress conditions of the heading face, caused by by the intermediate principle stress, indicates that the Mohr-Coulomb criterion is conservative.
Three-Dimensional Stability of Cyclical Footage Area in Tunnel Face
KSCE J Civ Eng
Liang, Qiao (author) / Liu, Jie (author) / Wang, Jun (author) / Zeng, Xian-Tao (author) / Wu, Shuo-Guo (author)
KSCE Journal of Civil Engineering ; 26 ; 955-965
2022-02-01
11 pages
Article (Journal)
Electronic Resource
English
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