Underground Construction Solutions at Hoyle Pond Mine:
Porcupine Gold Mines – Goldcorp Inc
Commodity: Gold (Au)
For more than a decade, Dumas has been the sole mining contractor to provide the Hoyle Pond Mine with underground engineering, ramp development, raises, construction and mine services.
Beginning in 1998, a small workforce provided development and rehabilitation work. The excavation of 6,000 meters of ramp (4.0 meters x 4.5 meters) and level development, 2,000 meters of track drift, 600 meters of narrow vein drifts and a series of timber and open raises were accomplished yearly. Our safe, efficient and productive performance resulted in Dumas winning a major winze project at the Hoyle Pond Mine.
In March 2004, Dumas provided consulting and engineering services for the shaft design used to construct the winze. Two months later, we began the winze project by excavating an internal 4.3 meter by 2.1 meter rectangular shaft from the 1,180 meter level up to the 655 meter level with a mechanized raise climber. The scope of the winze project included:
- Ramp and drift excavation on multiple levels to access the winze;
- The excavation of electrical substations, underground hoist room, rope drift, sump, loading pockets, main service bay access, fuel bays and cross-cuts;
- The installation and commissioning of the hoist, shaft furnishings, service bay crane and ventilation systems; and
- The construction of refuge stations, chutes, grizzlies and rock breakers.
Today, Dumas is driving the ramp (4.8 meter x 4.5 meter) from the 560 meter level to the 1330 meter level and continues to provide a full slate of innovative underground mine contracting services.
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