5,000 Tonne per Day Open Pit Mine Model
This mine is an open pit mine producing 5,000 tonnes ore and 5,000 tonnes waste per day. Rock characteristics for both ore and waste are typical of those of granite or porphyritic material. Operating conditions, wage scales, and unit prices are typical for western U.S. mining operations.
All costs listed are in 2012 US$. The key design criteria, operating schedule, equipment, personnel, supply requirements and costs are listed below:
Production
| Mine Type: |
Surface Mine |
|
| Stripping Ratio: |
1:1 |
|
| Ore Production: |
5,000 tonnes per day |
|
| Waste Production: |
5,000 tonnes per day |
|
| |
|
|
| Haul Distance - Ore | meters | 1,532 |
| Haul Distance - Waste | meters | 1,310 |
| Total Resource | tonnes | 18,720,000 |
| |
|
|
| Hours per shift | 10 | |
| Shifts per day | 2 | |
| Days per year | 312 | |
| |
|
|
| Bench height - Ore | meters | 4.60 |
| Bench height - Waste | meters | 6.72 |
| |
|
|
| Powder factor - Ore | kg/mt | 0.33 |
| Powder factor - Waste | kg/mt | 0.29 |
| Equipment |
Number |
Size |
| Hydraulic Shovels | 1 | 3.4 cubic meter |
| Front-end Loaders | 1 | 3.8 cubic meter |
| Rear-dump Trucks | 6 | 41.0 metric ton |
| Rotary Drills | 2 | 20.00 cm |
| Bulldozers | 3 | 60 kW |
| Graders | 1 | 115 kW |
| Water Tankers | 1 | 9,500 liter |
| Service/Tire Trucks | 3 | 1,800 kg gvw |
| Bulk Trucks | 1 | 450 kg/min |
| Light Plants | 4 | 8.9 kW |
| Pumps | 2 | 14.9 kW |
| Pickup Trucks | 5 | 680 kg |
Buildings
| Shop | sq.meters | 583 |
| Dry | sq.meters | 244 |
| Office | sq.meters | 383 |
| Warehouse | sq.meters | 220 |
| Anfo Storage Bin | cu.meters | 28 |
Development
| Preproduction Stripping | tonnes | 150,000 |
| Haul Road Construction | meters | 2,841 |
Hourly Personnel Requirements
| Drillers | 2 |
| Blasters | 2 |
| Excavator Operators | 3 |
| Truck Drivers | 8 |
| Equipment Operators | 7 |
| Utility Operators | 3 |
| Mechanics | 6 |
| Laborers/Maintenance | 11 |
| | ---- |
| Total Hourly Personnel | 42 |
Salaried Personnel Requirements
| Manager | 1 |
| Superintendent | 0 |
| Foreman | 2 |
| Engineer | 1 |
| Geologist | 1 |
| Supervisor | 2 |
| Technician | 4 |
| Accountant | 0 |
| Clerk | 1 |
| Personnel | 0 |
| Secretary | 2 |
| Security | 1 |
| | ------ |
| Total Salaried Personnel | 15 |
Primary Supply Requirements
| Diesel Fuel | liter/day | 4,751 |
| Electricity | kWh/day | 639 |
| Powder | kg/day | 3,100 |
| Caps | #/day | 33 |
| Primers | #/day | 29 |
| Drill Bits | #/day | 0.671 |
| Det. Cord | m/day | 368 |
Cost Summary
| Operating Costs | | |
| Supplies & Materials | $/mt ore | $1.05 |
| Hourly Labor | $/mt ore | 2.96 |
| Equipment Operation | $/mt ore | 1.67 |
| Salaried Labor | $/mt ore | 0.97 |
| Miscellaneous | $/mt ore | 0.67 |
| | | ------ |
| Total Operating Costs | | $7.32 |
Capital Costs
| Equipment Purchase | $8,579,500 |
| Haul Roads / Site Work | 2,096,900 |
| Pre-production Stripping | 483,600 |
| Buildings | 1,744,400 |
| Electrical System | 132,700 |
| Sustaining Capital | 1,804,700 |
| Working Capital | 810,100 |
| Engineering | 2,412,800 |
| Contingency | 1,545,000 |
| | ----------- |
| Total Capital Costs | $19,609,700 |
| |
|
| Total per Daily Tonne Ore & Waste | $1,961 |
Available Cost Models
Each of the models is developed from first principles based on typical mining criteria for rock densities, swell factors, drill penetration rates, etc. Industry-standard estimating methods are used for equipment selection, personnel allocation, and cost estimation. These models are invaluable for early order- of-magnitude estimates.
Surface mines: 36 Cost Models
production rates: 250 t/day to 80,000 t/day
stripping ratios 1:1 to 8:1
Underground mines: 48 Cost Models
production rates: 200 t/day to 45,000 t/day
access methods: adit or shaft
stoping methods: cut and fill, shrinkage, end slice, vertical crater retreat, sublevel longhole, room and pillar, sublevel caving, block caving
Placer operations: 32 Cost Models
production rates: 100 to 1,000 cubic yards per day
washing plants: mobile or stationary
stripping ratios: 1:1 to 8:1
Milling operations: 35 Cost Models
feed rates: 100 t/day to 80,000 t/day
flotation mills (1,2, or 3 concentrate products)
carbon-in-pulp mills
agitation leach mills
Gold heap leach operations: 6 Cost Models
leach rates: 5,000 to 20,000 t/day
run-of-mine or crush-screen-agglomerate operations
The models provide a great deal of important information about equipment, labor and supply requirements in addition to capital and operating costs.
They include all labor, material, supply and equipment operation costs incurred at the mine site, including supervision, administration and on-site management.
A more complete list of items included or excluded can be found in your Mining Cost Service Manual. The Manual also lists the wage and salary scales, supply prices, and other pertinent information used to construct the model.
Mining Cost Service
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