Primary Mining Method
Sub-Level Longhole retreat.
Information
- Drilling with Cubex drill: approximately 152 m (500 ft) per shift.
- Drilling with Boart drill: 91 m to 122 m (300 ft to 400 ft) per shift.
- Hauling (small stope): 454 t (500 short tons) per shift.
- Hauling (large stope): 1179 t (1300 short tons) per shift.
- Stope size: usually 4500 to 18 144 tons (5000 to 20000 short tons).
Primary Mining Method
Cut-and-Fill mining method.
Information
2 miners per stope, 1 miner per face for 27 to 32 t (30 to 35 short tons) per manshift.
Primary Mining Method
Sub-Level Longhole stoping.
Information
- Mucking: 68 tons/hour (75 short tons/hour) with one scooptram and 3 trucks.
- Drilling: 107 m/shift (350 ft/shift) with the Cubex drill.
Secondary Mining Method
Longhole transverse.
Information
- Mucking: 68 tons/hour (75 short tons/hour) with one scooptram and 3 trucks.
- Drilling: 107 m/shift (350 ft/shift) with the Cubex drill.
Primary Mining Method
Overhand cut-and-fill.
Information
The productivity is:
- Overall: 5 tons/manshift (6 short tons/manshift).
- Underground tonnage: 12 tons/manshift (13 short tons/manshift).
- Stope: 31 tons/manshift (34 short tons/manshift).
In order to achieve this productivity, two teams of 2 workers per stope and a nipper are working on rotating 10-hour shift. The teams assigned to a stope are responsible for the breakage, haulage to the orepass, remuck and stope preparation for the backfill.
Primary Mining Method
Mechanized Cut-and-Fill.
Information
Productivity includes drilling, blasting and mucking: 8.16 tons/manhour (9 short ton/manhour).
Primary Mining Method
Sub-level long-hole retreat with backfill.
Information
Drilling: 115 m/day (377 ft/day).
Primary Mining Method
Open stope.
Information
Mining costs for December 2000:
- $50/t (includes mining, development, hauling on surface).
- Drilling: 100 m (328 ft) per shift.
Primary Mining Method
Long-hole.
Information
- Drilling: 200 m/shift (656 ft/shift).
- Mucking: $6.50/ton + $1.25/ton for remote control mucking, price of the contractor.
Primary Mining Method
Longhole modified Avoca.
Information
Productivity for 1A zone is estimated at 10 000 tons/month.
Primary Mining Method
Modified Avoca.
Information
The following parameters were used in the productivity planning:
- Two-boom Jumbo: 240 m/month (787 ft/month) for one single heading available and 260 m/month (853 ft/month) for multiple headings available.
- Single boom Jumbo: 180 m/month (590 ft/month) for single or multiple headings, 1.5-m (5 ft) advances per day.
- Raisebore: 40 m/month (131 ft/month) per hole.
- Drilling and installation of cable bolt: 6000 m/month (19 685 ft/month).
- Longhole raise: 15 m/week (49 ft/week) per slot.
- Longhole drilling: 4500 m/month (14 764 ft/month).
- Longhole production: 6000 tonnes per month per stope.