layering of firedamp

layering of firedamp

[′lā·ə·riŋ əv ′fīr‚damp]
(mining engineering)
The formation of a layer of firedamp at the roof of a mine working and above the ventilating air current.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.