Hold-ventilation rate required to keep methane below 20 % LEL during coal voyage - fresh-air make-up calculation.
Formula
$$ \dot V_{vent} = \dot V_{CH_4} / (0.20 \cdot LEL) $$
Symbol legend
| Symbol | Meaning | Unit | Source |
|---|---|---|---|
| $LEL$ | Lower explosive limit (5 % for methane) | - | safety data |
| $\dot V$ | Ventilation flow rate | m³/h | fan curve |
Sources
- IMSBC Coal Schedule.