natural ventilation pressure

natural ventilation pressure

[′nach·rəl ‚vent·əl′ā·shən ‚presh·ər]

(mining engineering)

A pressure difference across the shaft-bottom doors caused by a lack of balance in the two vertical air columns.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.