Document Type
Conference Paper
Publication Date
2021
Abstract
ABSTRACT: Underground support systems using tendons has been one of the significant achievements in Civil and Mining engineering endeavors in facing the challenges of ground control. However, shear failure of rock bolts is a concern in underground excavations particularly with respect to seismic events. The understanding of the performance of rock bolts under dynamic loading condition requires a great deal of research. A series of tests were undertaken utilising a drop hammer mass of 592 kg dropped from a maximum height of 2 m onto grouted rock bolts encapsulated in concrete blocks in the double shear box to investigate the performance of rock bolts under dynamic shear load. Load cells, a displacement laser and high-speed camera were used to monitor the tests. Results from the data analyses are presented in the form of displacement, hammer mass drop velocity, force variation with time for all components involved in each test. A numerical simulation using ANSYS/LS-DYNA was used to simulate the behavior of 18 mm conventional rock bolts under high impact velocity loading conditions. The numerical simulation model was found to be in good agreement with the experimental results.
Publication Details
Saman Khaleghparast, Alex Remennikov, Naj Aziz, Numerical approach towards dynamic double shear testing of tendons using LS-DYNA, Proceedings of the 2021 Resource Operators Conference, University of Wollongong - Mining Engineering, 10-12 February 2021, University of Southern Queensland, 218-228.