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Directional Sharp-Point Failure Mechanism of Rocks Surrounding Underground Circular Cavities Subjected to Large-Scale Failure
Joint Authors
Guo, Xiao-fei
Zhao, Zhiqiang
Gao, Xu
Ma, Zhen-kai
Ma, Nian-jie
Source
Mathematical Problems in Engineering
Issue
Vol. 2019, Issue 2019 (31 Dec. 2019), pp.1-19, 19 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2019-02-27
Country of Publication
Egypt
No. of Pages
19
Main Subjects
Abstract EN
Large-scale expansion of failure areas in rocks surrounding underground cavities causes severe destruction of the underground space and may trigger serious disasters.
To study the large-scale failure mechanism and expansion laws of rocks surrounding underground cavities, we performed a theoretical study of the distribution characteristics of the stress field around a circular cavity and determined the directional sharp-point failure mechanism by analysing the stress destructive power using the three elements of the Mohr circle.
Results showed that, along the circumferential direction, the stress destructive power increases first and then decreases, showing a sharp-angular distribution.
Rock with any properties will suffer priority damage at the stress sharp point.
The direction criterion of the stress sharp points was proposed, and the direction of these points showed a convergent behaviour in the radial direction of the cavity, tending to be stable at 40°-50° beyond five times the cavity radius.
In addition, the results were verified by FLAC3D numerical simulation.
The theoretical analysis for the ideal circular cavity may provide references to study the damage laws of rocks surrounding other irregular-shaped space, as well as providing a theoretical basis for the prevention and control of underground engineering disasters.
American Psychological Association (APA)
Guo, Xiao-fei& Zhao, Zhiqiang& Gao, Xu& Ma, Zhen-kai& Ma, Nian-jie. 2019. Directional Sharp-Point Failure Mechanism of Rocks Surrounding Underground Circular Cavities Subjected to Large-Scale Failure. Mathematical Problems in Engineering،Vol. 2019, no. 2019, pp.1-19.
https://search.emarefa.net/detail/BIM-1194327
Modern Language Association (MLA)
Guo, Xiao-fei…[et al.]. Directional Sharp-Point Failure Mechanism of Rocks Surrounding Underground Circular Cavities Subjected to Large-Scale Failure. Mathematical Problems in Engineering No. 2019 (2019), pp.1-19.
https://search.emarefa.net/detail/BIM-1194327
American Medical Association (AMA)
Guo, Xiao-fei& Zhao, Zhiqiang& Gao, Xu& Ma, Zhen-kai& Ma, Nian-jie. Directional Sharp-Point Failure Mechanism of Rocks Surrounding Underground Circular Cavities Subjected to Large-Scale Failure. Mathematical Problems in Engineering. 2019. Vol. 2019, no. 2019, pp.1-19.
https://search.emarefa.net/detail/BIM-1194327
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1194327