A New Technique to Determine the Load Transfer Capacity of Resin Anchored Bolts

This paper describes a new technique to evaluate the load transfer capacity of different resin anchored rock bolts. With an increasing number of rock bolts currently being introduced into the Australian market for use in a variety of ground conditions, a new technique to determine bolt load transfer capacity is necessary. The assessment of the performance bolt with regard to load transfer mechanisms is conducted in the laboratory under Constant Normal Stiffness (CNS) conditions. This method of testing is considered as being a realistic way of evaluating bolt surface roughness as the tests are carried out under different confining pressures thus accommodating the changes in ground conditions such as high horizontal stress while allowing for surface dilations due to rubbing of rough surfaces against each other.