Olympic Dam Raise Drilling
VALUE TO DATE:
Macmahon has been contracted to provide underground raiseboring services for slots, backfill and ventilation purposes. A total of four underground slot rigs, two dresser 480 and two dresser 800H rigs are being used to complete slot lengths up to 150m long incoporating up to four intermediate levels. Diameters range from 0.5m down-reaming to up to 3m capital raises.
The Robbins 85R raisedrill is producing ventilation shaft extensions with a 4.5m diameter. Surface ventilation shafts are being constructed by a Robbins 121R raisedrill, with lengths up to 574m long and a 4.5m diameter