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Tunnel Ventilation Assessment

Estimate the ventilation requirement from manpower, diesel equipment and return-air velocity criteria, then compare the result with measured airflow at site.

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Application demonstration

See the engineering workflow in under 30 seconds.

Watch how field inputs are converted into required airflow, actual airflow, adequacy and shortfall or surplus for rapid ventilation screening.

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The engineering question

Is the airflow actually available at the working face adequate for the manpower, diesel equipment and minimum return-air velocity requirements applicable to the tunnel condition?

Inputs

  • Tunnel cross-sectional area
  • Persons working underground
  • Diesel equipment brake horsepower
  • Methane-risk condition
  • Measured return-air velocity, where available

What the application calculates

  • Air requirement for personnel
  • Air requirement for diesel equipment
  • Air requirement from return-air velocity criteria
  • Controlling design airflow
  • Required fan delivery after duct efficiency
  • Actual airflow from measured velocity × area
  • Adequacy percentage and shortfall / surplus
Screening tool, not a substitute for the project ventilation planSite-specific statutory requirements, ventilation layout, leakage, duct condition, auxiliary fans, contaminants, blasting fumes, gas risk and emergency arrangements must be assessed separately by competent persons.