CIM Bulletin, Vol. 71, No. 792, 1978
G. Scott Zimmer, Mine Engineer, Cassiar Asbestos Corporation Limited, Cassiar, B.C.
Mine planning at Cassiar consists of an annual cycle of projection, control, evaluation and revision following completion of annual diamond drilling during the summer months. The inherent difficulty in evaluating fibre grade and distribution, combined with a high-wall phase or push-back mining system, requires continuous modification to designs and schedules based on a cumulative evaluation of equipment performance and prediction versus production. To expedite the planning sequence, a mini-computer system has been introduced which allows emphasis to be placed on optimizing designs, exempting personnel from manual calculations and tabulations.
Cassiar Mine, Mine planning, Drilling, Sampling, Pit design, Reserve calculations, Scheduling, Computers.