Quarry Production Estimate Calculator

Work out quarry production estimate instantly with clear inputs, formula shown and shareable results.

About Quarry Production Estimate Calculator

Production per blast is face length x bench height x advance x rock density. Around 5% is typically lost as fines, oversize needing secondary breaking, and overburden dilution, so saleable product is below the blasted tonnage. Dividing annual target by tonnes per blast gives the blasting frequency to plan for.

Formula

Blast production

Volume = face length x bench height x advance; tonnes = volume x rock density

Worked example

With the default values below, Quarry Production Estimate Calculator returns Tonnes Per Blast of 18,720. Change any input above and every figure here is recalculated in your browser.

Inputs used

Working Face Lengthminimum 0 m: 120 m
Bench Heightminimum 0 m: 12 m
Advance Per Blastminimum 0 m: 5 m
Rock Densityminimum 0.01 t/m3: 2.6 t/m3

Results

Tonnes Per Blast: 18,720
Volume Per Blast: 7,200.0
Saleable Product: 17,784
Blasts Per Million Tonnes: 53.42

Step by step

1Values used
2Blast production
3Tonnes Per Blast= 18,720
4Volume Per Blast= 7,200.0
5Saleable Product= 17,784
6Blasts Per Million Tonnes= 53.42

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
Quarry blasting, face stability and edge protection are governed by mining and quarrying safety regulation. Faces must be inspected by a competent person and blasts designed to control flyrock and vibration.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Quarry blasting, face stability and edge protection are governed by mining and quarrying safety regulation. Faces must be inspected by a competent person and blasts designed to control flyrock and vibration.

Frequently Asked Questions

What limits advance per blast?

Burden and the number of rows fired. Deeper advances mean more rows, which increases confinement, worsens fragmentation at the back and raises vibration.

How is annual capacity estimated?

Multiply tonnes per blast by realistic blasts per year, allowing for weather, permitted blasting windows, plant availability and market demand rather than geometry alone.