TBM Telemetry — Boring Specific Energy
Boring Specific Energy for tunnel project performance management.
Specific energy is the TBM's blood-sugar reading: in steady rock it tracks rock strength, and a RISE at constant geology means dulling cutters or a clogging head days before either is visible. Plotting SE per ring is the cheapest predictive maintenance in tunnelling.
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.
Boring Specific Energy for tunnel project performance management. A free tbm performance & tunnelling tool — no sign-up, no upload, instant results in your browser.
About TBM Telemetry — Boring Specific Energy
TBM Telemetry — Boring Specific Energy computes the governing relationship SE = (2πN·T + F·v) / excavation rate live as you type. Specific energy is the TBM's blood-sugar reading: in steady rock it tracks rock strength, and a RISE at constant geology means dulling cutters or a clogging head days before either is visible. Plotting SE per ring is the cheapest predictive maintenance in tunnelling. 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 TBM Telemetry — Boring Specific Energy
- 1Enter your values — Cutterhead torque, Speed, Thrust, Advance speed and more (sensible defaults are pre-filled).
- 2Read the live results: Specific energy.
- 3Check the "with your numbers" line to see SE = (2πN·T + F·v) / excavation rate substituted step by step.
- 4Adjust inputs until the scenario matches yours, then copy or share the result.
Why use TBM Telemetry — Boring Specific Energy?
- ✓Instant, free and private — every calculation runs client-side in your browser; nothing is uploaded
- ✓Built on the stated formula SE = (2πN·T + F·v) / excavation rate with authoritative sources cited on the page (Maidl et al., Mechanised Shield Tunnelling, 2nd ed.; ITA/BTS — Mechanised tunnelling guidelines; NTNU prediction model — hard-rock TBM performance)
- ✓Specific energy is the TBM's blood-sugar reading: in steady rock it tracks rock strength, and a RISE at constant geology means dulling cutters or a clogging head days before either is visible.
- ✓Niche-specific defaults give a meaningful worked answer the moment the page loads
Frequently asked questions
What formula does the tbm telemetry — boring specific energy use?+
It evaluates SE = (2πN·T + F·v) / excavation rate, exactly as published. Sources: Maidl et al., Mechanised Shield Tunnelling, 2nd ed.; ITA/BTS — Mechanised tunnelling guidelines; NTNU prediction model — hard-rock TBM performance. 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?+
Specific energy is the TBM's blood-sugar reading: in steady rock it tracks rock strength, and a RISE at constant geology means dulling cutters or a clogging head days before either is visible. 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?+
Boring Specific Energy for tunnel project performance management. A free tbm performance & tunnelling tool. Plotting SE per ring is the cheapest predictive maintenance in tunnelling. 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
- TBM Telemetry — Clay Clogging Risk
- TBM Telemetry — Main Bearing Life Check
- TBM Telemetry — Alignment Tolerance Burn
- TBM Telemetry — Hyperbaric Intervention Planning
- TBM Telemetry — TBM Power Demand
- TBM Telemetry — Tunnel Carbon per Metre
- TBM Telemetry — Geotechnical Contingency Sizing
- Runner & Regrind Economics — ABS
- Press Brake Tonnage Calculator
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