A paper presenting the results of studies carried out on rotary drill bit life at Elura Mine N.S.W._x000D_
Contributing parameters, including data on drill operation and geology are compared to the performance observed for the drill bits._x000D_
Correlation and performance characteristics are presented, relating this data to cutting size distribution over drilling depth._x000D_
Details are presented of experience gained through the operation of rotary drills at Elura.