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Mining engineering calculators
Twelve of them, surface and underground. Every equation comes from a published handbook and every constant is cited on the page it is used. 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.
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Surface Blasthole Drill Productivity
Metres per shift, holes per shift and cost per metre from the rock you are actually drilling.
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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.
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Shovel & Loader Productivity
Bank tonnes per hour and cost per tonne, from the material you are digging and the bucket on the machine.
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Haul Road Design
Running width, curve widening, superelevation and stopping distance, run against the published limit as a bar you can watch cross it.
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Dewatering Pump & Pipe Sizing
Total dynamic head, brake horsepower and motor draw, plus whether the pump can actually prime where you are putting it.
OpenUnderground
Development, ground control and services.
Underground Jumbo Development
Metres of advance per shift, per day and per month from the round you drill and how it is cycled.
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Underground Round Charge & Powder Factor
How much explosive a development round takes, and whether the powder factor lands where it should.
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Underground Ground Support
Rate the rock mass, get the class, then read off bolt length, bolt spacing and what else the ground needs.
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Underground Pillar Design
What the pillars are carrying, what they can carry, and the factor of safety between the two.
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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.
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Underground Shaft Hoisting Capacity
Hoist cycle time, the skip payload your production rate needs, and the motor power to move it.
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. 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 is sent anywhere. There is no signup, no analytics and no network call, which is the reason they still work three levels down.
Still doing the reporting by hand?
Book a 20 minute callBuilt by a mining engineer with ten years underground.