Finite Element Numerical Modelling of Rock Bolt Axial Behaviour Subject to Different Geotechnical Conditions
Paper
Paper/Presentation Title | Finite Element Numerical Modelling of Rock Bolt Axial Behaviour Subject to Different Geotechnical Conditions |
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Presentation Type | Paper |
Authors | Nourizadeh, Hadi, Mirzaghorbanali, Ali, Aziz, Naj, McDougall, Kevin, Jodeiri Shokri, Behshad, Sahebi, Akbar, Motallebiyan, Amin and Entezam, Shima |
Editors | Aziz, Naj, Marston, Kevin and Mirzaghorbanali, Ali |
Journal or Proceedings Title | Proceedings of the 2023 Resource Operators Conference |
Journal Citation | pp. 221-229 |
Number of Pages | 9 |
Year | 2023 |
Publisher | University of Wollongong |
Place of Publication | Australia |
ISBN | 9781741283686 |
9781741283679 | |
Web Address (URL) of Paper | https://ro.uow.edu.au/coal/879/ |
Web Address (URL) of Conference Proceedings | https://ro.uow.edu.au/coal2023/ |
Conference/Event | 2023 Resource Operators conference (ROC2023) |
Event Details | 2023 Resource Operators conference (ROC2023) Delivery In person Event Date 09 to end of 10 Feb 2023 Event Location Wollongong, Australia Event Venue University of Wollongong Event Web Address (URL) |
Abstract | In rock bolting systems, grout acts as a medium to transfer initiated stress from the bolt to stable rock mass, and also to transfer the in-situ stress from surrounding rock to the bolt-grout interface. In this study interaction between the mechanical characteristics of the grout and rock bolt behaviour was investigated in different confining pressure conditions. First, the uniaxial compression strength of the grouts was experimentally determined, and then pull-out tests were carried out on rock bolts encapsulated using the same grouts to quantify the bonding behaviour. Numerical models using ABAQUS explicit finite element code were then applied to further analyse the effects of mechanical properties of the grouts and the confining stress on the behaviour of the rock bolting systems. The compression of the simulated results with the experimental tests showed that the proposed FE models simulate the axial behaviour of rock bolts efficiently. The results of the parametric study indicated that grout mechanical properties and the level of confining stress affect the ultimate bearing capacity of the encapsulated rock bolts and the force-displacement behaviour. The level of damage that occurred at the specimens due to pull-out load is also significantly influenced by these factors. |
Keywords | rock bolt |
ANZSRC Field of Research 2020 | 401902. Geomechanics and resources geotechnical engineering |
401905. Mining engineering | |
400502. Civil geotechnical engineering | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Centre for Future Materials |
School of Engineering | |
University of Wollongong | |
School of Surveying and Built Environment | |
Shahid Bahonar University of Kerman, Iran |
https://research.usq.edu.au/item/wz6yx/finite-element-numerical-modelling-of-rock-bolt-axial-behaviour-subject-to-different-geotechnical-conditions
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