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Mining engineering calculators
Sixteen of them, surface, underground, compliance and the office. Every engineering equation comes from a published handbook and every constant is cited on the page it is used. The two office ones run on your own numbers only, because no handbook publishes those. They run in the browser with no signal, so they work in a site office and off a laptop in a truck.
Surface
Bench, load and haul.
Surface Bench Blast Pattern
Burden, spacing, stemming, subdrill and explosive per hole, with the bench in section and the pattern in plan.
Open
Surface Blasthole Drill Productivity
Meters per shift, holes per shift and cost per meter from the rock you are actually drilling.
Open
Truck Cycle Time & Fleet Match
How long one haul cycle takes and how many trucks it takes to keep the loader busy. Surplus trucks are greyed out on the circuit.
Open
Shovel & Loader Productivity
Bank tons per hour and cost per ton, from the material you are digging and the bucket on the machine.
Open
Haul Road Design
Running width, curve widening, superelevation and stopping distance, run against the published limit as a bar you can watch cross it.
Open
Dewatering Pump & Pipe Sizing
Total dynamic head, brake horsepower and motor draw, plus whether the pump can actually prime where you are putting it.
Open
Asphalt Tonnage, Surface Paving
Tons of compacted asphalt for a road, pad or haul road, with Cat's two printed densities side by side, paver tons per hour, hours and truckloads.
OpenUnderground
Development, ground control and services.
Underground Jumbo Development
Meters of advance per shift, per day and per month from the round you drill and how it is cycled.
Open
Underground Round Charge & Powder Factor
How much explosive a development round takes, and whether the powder factor lands where it should.
Open
Underground Ground Support
Rate the rock mass, get the class, then read off bolt length, bolt spacing and what else the ground needs.
Open
Underground Pillar Design
What the pillars are carrying, what they can carry, and the factor of safety between the two.
Open
Underground Auxiliary Ventilation
How much air a development heading needs, what it costs in pressure to push it up the duct, and the fan duty that covers it.
Open
Underground Shaft Hoisting Capacity
Hoist cycle time, the skip payload your production rate needs, and the motor power to move it.
OpenSafety and compliance
Surface or underground, the numbers MSHA already has.
Office and paperwork
What the reporting chain costs before the invoice goes out, and what each job actually made.
Reporting Chain Cost, Shift Report to Invoice
Office hours a month and money a year spent getting shift numbers typed in, into client reports and onto the invoice, from your own numbers.
Open
Job Cost and Margin, Mining and Heavy Civil Contractors
What one job has cost and made so far, cost per meter, ton or cubic meter against what you bill, and cost against budget, from your own numbers.
OpenWhere the numbers come from. Each calculator names the handbook, edition and table behind every constant it uses, on the page, next to the number. The reporting chain and job cost calculators are the two exceptions: no handbook publishes office time or what a contractor's job costs, so they use only the numbers you type and say so. If a figure is drawn it is drawn from the same values the working table prints, never a second calculation, so the picture cannot disagree with the numbers under it.
Nothing you type is sent anywhere. There is no signup and no account, the arithmetic all happens in your browser, and an emailed copy opened from disk makes no network call at all, which is the reason they still work three levels down. The hosted pages do load Google Analytics, after the page itself has finished, so that we can see which tools get used.
Still doing the reporting by hand?
Book a 20 minute callBuilt by a mining engineer with ten years underground.