Mine Climate — Autocompression Heating
Autocompression Heating for deep and hot mine planning.
Air heats itself simply by descending — gravity's work appears as ~1 °C per 100 m before rock or machines add anything. Autocompression is why ultra-deep mines refrigerate even in arctic climates: by 3,000 m the intake has gained ~29 °C from physics alone, free and unavoidable.
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.
Autocompression Heating for deep and hot mine planning. A free mine ventilation & air quality tool — no sign-up, no upload, instant results in your browser.
About Mine Climate — Autocompression Heating
Mine Climate — Autocompression Heating computes the governing relationship ΔT = g·D/c_p ≈ 0.976 °C per 100 m (dry air) live as you type. Air heats itself simply by descending — gravity's work appears as ~1 °C per 100 m before rock or machines add anything. Autocompression is why ultra-deep mines refrigerate even in arctic climates: by 3,000 m the intake has gained ~29 °C from physics alone, free and unavoidable. 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 Mine Climate — Autocompression Heating
- 1Enter your values — Vertical depth of airway, Surface air temperature (sensible defaults are pre-filled).
- 2Read the live results: Temperature rise, Air temp at depth (dry).
- 3Check the "with your numbers" line to see ΔT = g·D/c_p ≈ 0.976 °C per 100 m (dry air) substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Mine Climate — Autocompression Heating?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula ΔT = g·D/c_p ≈ 0.976 °C per 100 m (dry air) 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.)
- ✓Air heats itself simply by descending — gravity's work appears as ~1 °C per 100 m before rock or machines add anything.
- ✓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 mine climate — autocompression heating use?+
It evaluates ΔT = g·D/c_p ≈ 0.976 °C per 100 m (dry air), 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?+
Air heats itself simply by descending — gravity's work appears as ~1 °C per 100 m before rock or machines add anything. 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?+
Autocompression Heating for deep and hot mine planning. A free mine ventilation & air quality tool. Autocompression is why ultra-deep mines refrigerate even in arctic climates: by 3,000 m the intake has gained ~29 °C from physics alone, free and unavoidable. 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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