Laboratory study of the behaviour of grouted cable bolts under static and dynamic axial loading
Presentation
Paper/Presentation Title | Laboratory study of the behaviour of grouted cable bolts under static and dynamic axial loading |
---|---|
Presentation Type | Presentation |
Authors | Anzanpour, S. (Author), Aziz, N. (Author), Remennikov, A. (Author), Nemcik, J. (Author), Mirzaghorbanali, A. (Author) and Rastegarmanesh, A. (Author) |
Journal or Proceedings Title | Proceedings of the Eurock (2022) |
ERA Conference ID | 50403 |
Number of Pages | 8 |
Year | 2022 |
Place of Publication | Finland |
Web Address (URL) of Paper | http://www.eurock2022.com |
Conference/Event | Eurock 2022: Rock and Fracture Mechanics in Rock Engineering and Mining |
European Rock Mechanics Symposium | |
Event Details | Eurock 2022: Rock and Fracture Mechanics in Rock Engineering and Mining Event Location Espoo, Finland |
Event Details | European Rock Mechanics Symposium EUROCK |
Abstract | As a typical roof-supporting system of tunnels, Cable bolts are subjected to static and dynamic loading conditions caused by ground movements and mining activities. As mining goes deeper, the chance of undetermined ground stress concentrations increases and subsequently, the probability of sudden unexpected failures such as rock bursts increases. Many studies have been carried out to simulate the axial loading condition of the tendons, especially cable bolts, under static and dynamic loading modes; however, it barely can be seen that both behaviours have been studied and compared simultaneously. From other points of view, although research has been conducted on Barrel and Wedge and load-bearing plates, these components have hardly been considered together in axial loading studies. In this laboratory study, a new pullout testing mechanism has been introduced, which is capable of implementing axial loading of cable bolts in both static and dynamic loading conditions. In addition, in a parametric study, the role of bulbs of the cable bolts as well as barrel and wedges on the load-bearing capacity of the anchors have been examined. The bond between cable bolts and grout material in the bulbed cables behaves almost 30% stronger in static and 40% stronger in dynamic tests in comparison with plain cables. In general, the required pullout energy in dynamic tests was 25-50% less than in static tests. |
Keywords | Cable bolt, static loading, dynamic loading, axial load transfer mechanisms |
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. |
Byline Affiliations | University of Wollongong |
University of Southern Queensland | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q7v8v/laboratory-study-of-the-behaviour-of-grouted-cable-bolts-under-static-and-dynamic-axial-loading
79
total views4
total downloads1
views this month0
downloads this month