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Mining Cost Models

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Free 5,000 tpd Open Pit Cost Model
Other Cost Models: Open Pit, Underground, Placer, Milling and Heap Leach

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.  The total resource to be mined is 18,715,000 tonnes.   Ore is hauled 1,068 meters to an ore stockpile.  Waste is hauled 535 meters to a waste rock dump.  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.  The key design criteria; operating schedule, equipment, personnel and supply requirements; and costs one listed below:

Last updated - November 2007

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 1,068
Haul Distance - Waste meters 535
Total Resource tonnes 18,715,000
     
Hours per shift  10  
Shifts per day 2  
Days per year 312  
     
Bench height - Ore meters 5.49
Bench height - Waste meters 8.53
     
Powder factor - Ore kg/tonne 0.28
Powder factor - Waste kg/tonne 0.23
Equipment
Hydraulic Shovels 1-4.5 cu.mt
Front-end Loaders 1-5.4 cu.mt
Rear-dump Trucks  5-36.3 tonne
Rotary Drills 1-17.15 cm
Bulldozers 4-125 kW
Graders 1-150 kW
Water Tankers 1-9,500 liter
Service/Tire Trucks 3-6,800 kg gvw
Bulk Trucks 1-450 kg/min
Light Plants 4-13 kW
Pumps 2-4 kW
Pickup Trucks 4
Buildings
Shop sq.meters 486
Dry sq.meters 221
Office sq.meters 383
Warehouse  sq.meters 297
Anfo Storage Bin cu.meters  20
Development
Preproduction Stripping tonnes 150,000
Haul Road Construction meters 1,603
Hourly Personnel Requirements
Drillers 2
Blasters 2
Excavator Operators  4
Truck Drivers 7
Equipment Operators 9
Utility Operators 2
Mechanics  4
Laborers/Maintenance   8
  ----
Total Hourly Personnel 38
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 5,262
Electricity kWh/day 639
Powder kg/day 2,550
Caps #/day 22
Primers #/day 20
Drill Bits #/day 0.07
Det. Cord m/day 287
Cost Summary
Operating Costs    
Supplies & Materials $/tonne ore $2.07
Labor $/tonne ore 1.96
Administration $/tonne ore 0.82
Sundry Items  $/tonne ore 0.48
    ------
Total Operating Costs   $5.33
Capital Costs
Equipment  $8,066,100
Haul Roads 1,095,600
Pre-production Stripping 393,500
Buildings 1,632,700
Electrical System 63,600
Working Capital   1,258,200
Engineering & Management 2,025,300
Contingency 1,453,500
  -----------
Total Capital Costs $15,988,500
   
Total per Daily Tonne Ore & Waste $1,599

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.

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