Tunnel Logistics — TBM Ventilation Demand
TBM Ventilation Demand for TBM drive planning.
TBM drives are the longest dead-end headings in construction — at 5 km even 4%-per-100 m leakage demands a fan pushing multiples of the face requirement. This is the same compounding math as the mining duct tools, at tunnel scale: coupling quality IS fan size.
Formula
Note: Planning-level tunnelling estimate — actual TBM performance is set by detailed geotechnical baseline data, machine design and the contractor's means & methods. Use for feasibility framing only.
TBM Ventilation Demand for TBM drive planning. A free tbm performance & tunnelling tool — no sign-up, no upload, instant results in your browser.
About Tunnel Logistics — TBM Ventilation Demand
Tunnel Logistics — TBM Ventilation Demand computes the governing relationship Q_face = people×0.05 + diesel kW×0.06; fan = face ÷ (1−leak)^(L/100) live as you type. TBM drives are the longest dead-end headings in construction — at 5 km even 4%-per-100 m leakage demands a fan pushing multiples of the face requirement. This is the same compounding math as the mining duct tools, at tunnel scale: coupling quality IS fan size. 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 Tunnel Logistics — TBM Ventilation Demand
- 1Enter your values — People in tunnel, Diesel plant underground, Drive length, Duct leakage per 100 m (sensible defaults are pre-filled).
- 2Read the live results: Required at face, Fan duty (with leakage).
- 3Check the "with your numbers" line to see Q_face = people×0.05 + diesel kW×0.06; fan = face ÷ (1−leak)^(L/100) substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use Tunnel Logistics — TBM Ventilation Demand?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula Q_face = people×0.05 + diesel kW×0.06; fan = face ÷ (1−leak)^(L/100) with authoritative sources cited on the page (Maidl et al., Mechanised Shield Tunnelling, 2nd ed.; ITA/BTS — Mechanised tunnelling guidelines)
- ✓TBM drives are the longest dead-end headings in construction — at 5 km even 4%-per-100 m leakage demands a fan pushing multiples of the face requirement.
- ✓Niche-specific defaults give a meaningful worked answer the moment the page loads
Frequently asked questions
What formula does the tunnel logistics — tbm ventilation demand use?+
It evaluates Q_face = people×0.05 + diesel kW×0.06; fan = face ÷ (1−leak)^(L/100), exactly as published. Sources: Maidl et al., Mechanised Shield Tunnelling, 2nd ed.; ITA/BTS — Mechanised tunnelling guidelines. 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?+
TBM drives are the longest dead-end headings in construction — at 5 km even 4%-per-100 m leakage demands a fan pushing multiples of the face requirement. Planning-level tunnelling estimate — actual TBM performance is set by detailed geotechnical baseline data, machine design and the contractor's means & methods. Use for feasibility framing only.
When is this calculator the right tool for the job?+
TBM Ventilation Demand for TBM drive planning. A free tbm performance & tunnelling tool. This is the same compounding math as the mining duct tools, at tunnel scale: coupling quality IS fan size. 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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