coal barrier

coal barrier

[′kōl ‚bar·ē·ər]
(mining engineering)
A protective pillar composed of coal.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
and Wei, W.B.: 2010, Three-dimensional analysis of coal barrier pillars in tailgate area adjacent to the fully mechanized top caving mining face.