self-advancing supports

self-advancing supports

[¦self əd¦vans·iŋ sə′pȯrts]
(mining engineering)
An assembly of hydraulically operated steel hydraulic supports, on a long-wall face, which are moved forward as a unit. Also known as walking props.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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