A developed analytical model to predict axial load along a fully grouted rock bolt

In recent years fully encapsulated rock bolts have become a key element in the design of ground control systems. The main reason is that they offer maximum shear resistance to bed separation. In this research, the load transfer capacity of fully grouted bolts is evaluated analytically both using an end plate and without an end plate. The bolt and surrounding materials were assumed as elastic and elastoplastic materials respectively. The load transfer mechanism of a fully grouted bolt is a function of some parameters, such as bolt length, shear stiffness of interfaces, in situ stress, face plate and distance along the bolt. These factors were analytically evaluated. Finally the load along the bolt was predicted in different surrounding rock characteristics.