ABSTRACT
Several types of ground reinforcement have been used at Mt Charlotte mine over the last few decades. A 100 kN shell anchor bolt was used in development drives for many years, but was replaced with a resin anchor rebar bolt, at a lower installed density, with excellent results. Secondary support comprises a fully grouted rebar for tight conditions, and a yielding element, the cone bolt, where dynamic loading or major movements are expected. The cone bolt has performed well under seismic conditions. For control of overbreak in stopes, plain strand cable has given way to purpose-designed modified strand cable. Despite the wide range of ground reinforcement hardware now available, suppliers generally do not provide enough information to ensure quality designed and installed ground reinforcement in mines.
