Case 1: 8 workers / 1 LHD / 55 kW / 10% reserve
Inntak
Workers=8, equipment=LHD ×1, power=55 kW, condition=baseline, simultaneity=100%, local minimum=0
Úttak
About 3.8 m³/s / 229 m³/min / 8,100 cfm. Governing criterion: diesel equipment.
Mining reiknivél
Works offline in the browser
Supports m³/s, m³/min, and cfm
Handles kW and hp inntaks
Quick Underground Ventilation Airflæði Reiknivél
Quickly estimate required airflæði from worker count, diesel equipment count, power, and condition factors.
This is a preliminary estimate for early áætlunning, training, and samanburður. It is not a substitute for final ventilation design or regulatory compliance.
Safety note
All calculations stay in this browser and are not sent to any server.
- For preliminary estimates, training, and samanburður only. Not a substitute for final ventilation design or legal compliance.
- Yfirferð gas, dust, heat load, oxygen deficiency, and post-blast dilution separately.
- Adjust diesel condition factors to match site standards and equipment maker guidance.
How to use
Athugasemdir
- Enter the worker count for the area you want to ventilate.
- Add one row per diesel equipment type and enter count, power, condition factor, and simultaneity.
- Open settings if you need to change airflæði coefficients, minimum airflæði, or decimal places.
- Check the governing criterion and the final recommended airflæði in the niðurstaða pane.
Examples
Inntak / Úttak
Case 2: 4 workers / 1 þjónusta truck / 30 kW / local minimum 120 m³/min
Inntak
Workers=4, equipment=þjónusta truck ×1, power=30 kW, condition=controlled, simultaneity=100%, local minimum=120 m³/min, reserve=10%
Úttak
About 2.2 m³/s / 132 m³/min / 4,700 cfm. Governing criterion: local minimum airflæði.
Glossary
Underground ventilation airflæði calculation
- Required airflæði
- The estimated amount of air that should be supplied to the underground working area.
- Governing criterion
- The largest requirement among personnel, diesel equipment, and local minimum airflæði.
- Simultaneity
- The share of equipment that is expected to operate at the same time.
- Condition factor
- A reference factor that reflects differences in equipment condition or aftertreatment.
- Reserve margin
- An added percentage above the governing criterion to keep the estimate conservative.
Formulas
Internal calculations use m³/s as the base unit.
- Q_people = N_people × R_people
- Q_row = N_i × P_i × F_condition_i × F_simultaneity_i × R_diesel
- Q_governing = max(Q_people, ΣQ_row, Q_local_min)
- Q_design = Q_governing × (1 + reserve / 100)
- 1 m³/s = 60 m³/min = 2118.88 cfm
Algengar spurningar
Athugasemdir
Can I use this for final ventilation design?
No. This is for preliminary estimates, training, and samanburður. Final design must follow regulations, site standards, and professional judgment.
Does it support both m³/s and cfm?
Yes. The display can switch, and the internal calculation uses SI units.
What does the condition factor mean?
It is a reference factor for site standards, aftertreatment, maintenance state, and similar differences.
What if there are multiple diesel equipment types?
Add rows and enter the count, power, and factors for each equipment type separately.
Can I use it offline?
Yes. It runs entirely in the browser and does not use external APIs.
Athugasemdir
Internal calculations use m³/s as the base unit.
- This verkfæri provides reference calculations. Final design must prioritize local regulations, internal standards, and manufacturer conditions.
- Adjust the condition and worker coefficients to your site assumptions.
- Enter only the equipment that actually runs at the same time if you want easier samanburðurs.