Study of truss bolt system for highly stressed rock mass using finite element modelling techniques
Poster
Paper/Presentation Title | Study of truss bolt system for highly stressed rock mass using finite element modelling techniques |
---|---|
Presentation Type | Poster |
Authors | Ghabraie, B. (Author), Ren, G. (Author), Xie, Y. M. (Author) and Ghabraie, K. (Author) |
Editors | Narsilio, G., Arulrajah, A. and Kodikara, J. |
Journal or Proceedings Title | Proceedings of the 11th Australia New Zealand Conference on Geomechanics |
Number of Pages | 6 |
Year | 2012 |
Place of Publication | Australia |
ISBN | 9780646543017 |
Web Address (URL) of Paper | http://anz2012.com.au/ |
Conference/Event | 11th Australia New Zealand Conference on Geomechanics: Ground Engineering in a Changing World |
Event Details | Rank B |
Event Details | 11th Australia New Zealand Conference on Geomechanics: Ground Engineering in a Changing World Event Date 15 to end of 18 Jul 2012 Event Location Melbourne, Australia |
Abstract | Instability of underground excavations causes many problems, it affects safe working environment, reduces recovery of minerals and increases costs of mining operations. Following excavation in rock, a new stress distribution will be produced around the opening. It is known that after a distance from opening boundary, a stable rock arch will be formed regardless of the shape of the opening. Beneath this arch there is a plastic, fractured loosened area that required to be stabilised. Conventional systematic rock bolting is a common practice. However, experience has shown that in the case of severe instability, this type of reinforcement is not satisfactory in controlling roof rock deformations. In these circumstances using truss bolts would be a better alternative. This paper investigates the mechanism of truss bolts and their interaction with surrounding rock mass using numerical modelling techniques. A case study involving a truss bolting reinforced rectangular tunnel in fractured rock mass is discussed in comparison with a conventional systematic rock bolting. Design parameters of truss bolt system are considered with respect to the shape and dimension of the loosened area and design recommendations are presented. Results showed that truss bolt reduces the roof deflection and reinforces the loosened area by moving the natural roof arch towards the opening. |
Keywords | truss bolt system, reinforcement, natural roof arch, finite element method |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 400502. Civil geotechnical engineering |
401902. Geomechanics and resources geotechnical engineering | |
401905. Mining engineering | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Institution of Origin | University of Southern Queensland |
Byline Affiliations | Royal Melbourne Institute of Technology (RMIT) |
Department of Agricultural, Civil and Environmental Engineering |
https://research.usq.edu.au/item/q1788/study-of-truss-bolt-system-for-highly-stressed-rock-mass-using-finite-element-modelling-techniques
1902
total views14
total downloads0
views this month0
downloads this month