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Journal of the Southern African Institute of Mining and Metallurgy

Print version ISSN 0038-223X

Abstract

JALALIFAR, H. An analytical solution to predict axial load along fully grouted bolts in an elasto-plastic rock mass. J. S. Afr. Inst. Min. Metall. [online]. 2011, vol.111, n.11, pp. 809-814. ISSN 0038-223X.

Nowadays, fully encapsulated rockbolts have become a key element in the design of ground control systems. The main reason is that they offer high axial resistance to bed separation. In this research, the load transfer capacity of a fully grouted bolt is evaluated analytically in an elasto-plastic rock mass condition. The research considered the effect of bolt end-plate on load transfer capacity. Bolt and surrounding materials were assumed to be elastic and elastoplastic materials respectively. The load transfer mechanism of a fully grouted bolt is a function of parameters such as bolt length, shear stiffness of interfaces, in situ stress, presence of face-plate and distance along the bolt. These factors were analytically evaluated. Finally, the load along the bolt was predicted in different surrounding rock mass characteristics.

Keywords : fully grouted bolt; axial load; elastoplastic; analytical; numerical-load transfer..

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