Studying the performance of fully encapsulated rock bolts with modified structural elements

Abstract Numerical simulation is a useful tool in investigating the loading performance of rock bolts. The cable structural elements (cableSELs) FLAC3D are commonly adopted to simulate bolts solve geotechnical issues. In this study, bonding interface between bolt and grout material was simulated with two-stage shearing coupling model. Furthermore, FISH language used incorporate shear model into modify current cableSELs. Comparison performed numerical experimental results confirm that approach can properly Based on modified cableSELs, influence diameter stress propagation along were studied. indicated load transfer capacity rose apparently. With increasing, bolting system likely change from ductile behaviour brittle behaviour. Moreover, after loaded, position where maximum occurred variable. Specifically, continuous loading, it shifted loaded end other end.