Network — Stopping/Seal Leakage
Stopping/Seal Leakage for ventilation network design and surveying.
Twenty 'pretty good' stoppings leak more than one bad door — leakage is a fleet problem and pressure is its fuel: every leak grows with the square root of the differential across it. District redesigns that LOWER the intake-return differential recover air no amount of plastering can.
Formula
Note: Mine ventilation is statutory and life-safety territory: airflow quantities, gas limits and re-entry times must be set by the registered ventilation engineer/manager under your jurisdiction's mining regulations — this calculator is a planning and training aid.
Stopping/Seal Leakage for ventilation network design and surveying. A free mine ventilation & air quality tool — no sign-up, no upload, instant results in your browser.
About Network — Stopping/Seal Leakage
Network — Stopping/Seal Leakage computes the governing relationship Q_leak = √(Δp/R) per stopping × count live as you type. Twenty 'pretty good' stoppings leak more than one bad door — leakage is a fleet problem and pressure is its fuel: every leak grows with the square root of the differential across it. District redesigns that LOWER the intake-return differential recover air no amount of plastering can. Defaults are pre-filled with realistic values for this exact scenario, and the worked example substitutes your numbers step by step so the math is never a black box.
How to use Network — Stopping/Seal Leakage
- 1Enter your values — Stoppings between intake & return, Pressure across the line, Resistance per stopping (sensible defaults are pre-filled).
- 2Read the live results: Leak per stopping, Total line leakage.
- 3Check the "with your numbers" line to see Q_leak = √(Δp/R) per stopping × count substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Network — Stopping/Seal Leakage?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula Q_leak = √(Δp/R) per stopping × count with authoritative sources cited on the page (McPherson, M.J., Subsurface Ventilation and Environmental Engineering; Hartman et al., Mine Ventilation and Air Conditioning, 3rd ed.)
- ✓Twenty 'pretty good' stoppings leak more than one bad door — leakage is a fleet problem and pressure is its fuel: every leak grows with the square root of the differential across it.
- ✓SI ⇄ Imperial toggle converts your inputs in place, so you can work in the units your drawings use
Frequently asked questions
What formula does the network — stopping/seal leakage use?+
It evaluates Q_leak = √(Δp/R) per stopping × count, exactly as published. Sources: McPherson, M.J., Subsurface Ventilation and Environmental Engineering; Hartman et al., Mine Ventilation and Air Conditioning, 3rd ed.. The substituted worked example on the page lets you verify every step against the textbook.
How should I read the result — and how far can I trust it?+
Twenty 'pretty good' stoppings leak more than one bad door — leakage is a fleet problem and pressure is its fuel: every leak grows with the square root of the differential across it. Mine ventilation is statutory and life-safety territory: airflow quantities, gas limits and re-entry times must be set by the registered ventilation engineer/manager under your jurisdiction's mining regulations — this calculator is a planning and training aid.
When is this calculator the right tool for the job?+
Stopping/Seal Leakage for ventilation network design and surveying. A free mine ventilation & air quality tool. District redesigns that LOWER the intake-return differential recover air no amount of plastering can. For neighbouring scenarios, the related tools below cover the same engine with different presets.
Does it support both metric and imperial units?+
Yes — the SI ⇄ Imperial toggle converts the values already in the fields, preserving the physical quantity, so you can flip mid-calculation without re-entering anything.
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