rockshaft


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rockshaft

[′räk‚shaft]
(mining engineering)
A shaft through which rock can be brought into a mine for filling, stopes, or other excavations.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
The operator appears to have the chain wrapped around or attached to the rockshaft rather than the drawbar.
More time was spent repairing the rockshaft assembly after the spring jammed due to decades of rust build-up.
During those years, Dad switched the hydraulic unit on the tractor to that off a late Model B so the rockshaft could be stopped in the middle instead of going to the end of its travel, as was the design in 1945.