"Shear Behaviour of Fibreglass Rock Bolts for Various Pretension Loads" by Peter Gregor, Ali Mirzaghorbanali et al.
In this paper, after determining an appropriate experimental design and testing scheme to test the shear performance suitably, the impacts of pretension and shear interfaces on fibreglass rock bolts were investigated. For this purpose, at the first stage, the double shear testing apparatus was modified to address the issues and shortcomings of the established testing methodology. Then, 20-tonne and 30-tonne rock bolts were tested with pretension loads of 0 kN, 10 kN, 15 kN, and 20 kN for each te...
Source: uow.edu.au