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Failure Process and Stability Analysis of Rock Blocks in a Large Underground Excavation Based on a Numerical Method
Joint Authors
Chen, Juntao
Xiao, Ming
Chen, Shijie
Source
Mathematical Problems in Engineering
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-01-13
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
A numerical analysis method for block failure is proposed that is based on continuum mechanics.
First, a mesh model that includes marked blocks was established based on the grid-based block identification method.
Then, expressions of the contact force under various contact states were derived based on the explicit contact force algorithm, and a contact simulation method between blocks and the surrounding rock was proposed.
The safety factors of the blocks were calculated based on the strength reduction method.
This numerical analysis method can simulate both the continuous deformation of the surrounding rock and the discontinuous failure processes of the blocks.
A simple example of a sliding block was used to evaluate the accuracy and rationality of the numerical method.
Finally, combined with a deep underground excavation project under complex geological conditions, the stability of the blocks and rock were analyzed.
The results indicate that the key blocks are damaged after excavation, the potentially dangerous blocks loosen and undergo large deformations, and the cracks between the blocks and the rock gradually increase as the excavation proceeds.
The safety factors of the blocks change during the excavation.
The numerical results demonstrate the influence of the surrounding rock on the failure process and on the stability of the blocks, and an effective analysis method is provided for the stability analysis of blocks under complex geological conditions.
American Psychological Association (APA)
Chen, Shijie& Xiao, Ming& Chen, Juntao. 2020. Failure Process and Stability Analysis of Rock Blocks in a Large Underground Excavation Based on a Numerical Method. Mathematical Problems in Engineering،Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1195074
Modern Language Association (MLA)
Chen, Shijie…[et al.]. Failure Process and Stability Analysis of Rock Blocks in a Large Underground Excavation Based on a Numerical Method. Mathematical Problems in Engineering No. 2020 (2020), pp.1-12.
https://search.emarefa.net/detail/BIM-1195074
American Medical Association (AMA)
Chen, Shijie& Xiao, Ming& Chen, Juntao. Failure Process and Stability Analysis of Rock Blocks in a Large Underground Excavation Based on a Numerical Method. Mathematical Problems in Engineering. 2020. Vol. 2020, no. 2020, pp.1-12.
https://search.emarefa.net/detail/BIM-1195074
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1195074