Emergency — Fire Throttling / Buoyancy Check
Fire Throttling / Buoyancy Check for mine emergency preparedness planning.
A fire is an unplanned fan: hot smoke wants to rise, and in inclined airways its buoyancy can stall or reverse the ventilation that escape plans assumed. The temperature-rise number here is the first screening — fire simulation (VentFIRE etc.) takes over for any answer that isn't clearly small.
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.
Fire Throttling / Buoyancy Check for mine emergency preparedness planning. A free mine ventilation & air quality tool — no sign-up, no upload, instant results in your browser.
About Emergency — Fire Throttling / Buoyancy Check
Emergency — Fire Throttling / Buoyancy Check computes the governing relationship ΔT = q_fire/(ρ·c_p·Q); buoyancy scales with ΔT × elevation difference live as you type. A fire is an unplanned fan: hot smoke wants to rise, and in inclined airways its buoyancy can stall or reverse the ventilation that escape plans assumed. The temperature-rise number here is the first screening — fire simulation (VentFIRE etc.) takes over for any answer that isn't clearly small. 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 Emergency — Fire Throttling / Buoyancy Check
- 1Enter your values — Fire size, Airway airflow, Airway inclination (sensible defaults are pre-filled).
- 2Read the live results: Airstream temp rise, Buoyancy pressure (rough).
- 3Check the "with your numbers" line to see ΔT = q_fire/(ρ·c_p·Q); buoyancy scales with ΔT × elevation difference substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Emergency — Fire Throttling / Buoyancy Check?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula ΔT = q_fire/(ρ·c_p·Q); buoyancy scales with ΔT × elevation difference with authoritative sources cited on the page (MSHA 30 CFR Parts 57/75 — Ventilation standards; McPherson, M.J., Subsurface Ventilation and Environmental Engineering)
- ✓A fire is an unplanned fan: hot smoke wants to rise, and in inclined airways its buoyancy can stall or reverse the ventilation that escape plans assumed.
- ✓Niche-specific defaults give a meaningful worked answer the moment the page loads
Frequently asked questions
What formula does the emergency — fire throttling / buoyancy check use?+
It evaluates ΔT = q_fire/(ρ·c_p·Q); buoyancy scales with ΔT × elevation difference, exactly as published. Sources: MSHA 30 CFR Parts 57/75 — Ventilation standards; McPherson, M.J., Subsurface Ventilation and Environmental Engineering. 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?+
A fire is an unplanned fan: hot smoke wants to rise, and in inclined airways its buoyancy can stall or reverse the ventilation that escape plans assumed. 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?+
Fire Throttling / Buoyancy Check for mine emergency preparedness planning. A free mine ventilation & air quality tool. The temperature-rise number here is the first screening — fire simulation (VentFIRE etc.) takes over for any answer that isn't clearly small. For neighbouring scenarios, the related tools below cover the same engine with different presets.
Do I need to install anything or create an account?+
No. The tool is pure client-side JavaScript: open the page and it works, offline once loaded, with no account, no quota and no data leaving your device.
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