Emergency — Refuge Heat Buildup
Refuge Heat Buildup for mine emergency preparedness planning.
Twelve resting humans are a 1.4 kW heater in a sealed steel box — in a hot deep mine where the rock itself sits at 35 °C, a 10 °C rise reaches survivability limits. Heat killed the occupants in more than one refuge incident; modern chambers spec cooling capacity for exactly this balance.
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.
Refuge Heat Buildup for mine emergency preparedness planning. A free mine ventilation & air quality tool — no sign-up, no upload, instant results in your browser.
About Emergency — Refuge Heat Buildup
Emergency — Refuge Heat Buildup computes the governing relationship ΔT = n·q_met / (U·A) — steady-state balance to the rock live as you type. Twelve resting humans are a 1.4 kW heater in a sealed steel box — in a hot deep mine where the rock itself sits at 35 °C, a 10 °C rise reaches survivability limits. Heat killed the occupants in more than one refuge incident; modern chambers spec cooling capacity for exactly this balance. 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 — Refuge Heat Buildup
- 1Enter your values — Occupants, Metabolic heat each, Chamber wall area, Wall heat transfer U (sensible defaults are pre-filled).
- 2Read the live results: Steady ΔT above rock temp.
- 3Check the "with your numbers" line to see ΔT = n·q_met / (U·A) — steady-state balance to the rock substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Emergency — Refuge Heat Buildup?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula ΔT = n·q_met / (U·A) — steady-state balance to the rock with authoritative sources cited on the page (MSHA 30 CFR Parts 57/75 — Ventilation standards; McPherson, M.J., Subsurface Ventilation and Environmental Engineering)
- ✓Twelve resting humans are a 1.4 kW heater in a sealed steel box — in a hot deep mine where the rock itself sits at 35 °C, a 10 °C rise reaches survivability limits.
- ✓Niche-specific defaults give a meaningful worked answer the moment the page loads
Frequently asked questions
What formula does the emergency — refuge heat buildup use?+
It evaluates ΔT = n·q_met / (U·A) — steady-state balance to the rock, 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?+
Twelve resting humans are a 1.4 kW heater in a sealed steel box — in a hot deep mine where the rock itself sits at 35 °C, a 10 °C rise reaches survivability limits. 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?+
Refuge Heat Buildup for mine emergency preparedness planning. A free mine ventilation & air quality tool. Heat killed the occupants in more than one refuge incident; modern chambers spec cooling capacity for exactly this balance. 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.
Related tools
- Emergency — Stench Gas Coverage Time
- Emergency — Fire Throttling / Buoyancy Check
- Emergency — CO Spread Time After Fire Start
- Emergency — Sealed Area Inertization
- Emergency — Barometric Breathing of Sealed Areas
- Network — Parallel Airways Resistance
- Network — Series Airways Resistance
- Surface Treatment — Milling Production
- Connection Screen — Shear Tab Screening
Related Manufacturing tools
Spindle Speed Calculator — Aluminum 6061
Carbide starting RPM for milling Aluminum 6061: n = 1000·Vc/(π·D) with a handbook cutting speed preset.
● LiveSpindle Speed Calculator — Mild Steel 1018
Carbide starting RPM for milling Mild Steel 1018: n = 1000·Vc/(π·D) with a handbook cutting speed preset.
● LiveSpindle Speed Calculator — Stainless 304
Carbide starting RPM for milling Stainless 304: n = 1000·Vc/(π·D) with a handbook cutting speed preset.
● Live