headblock

headblock

[′hed‚bläk]
(mining engineering)
A stop at the head of a slope or shaft to keep cars from going down the shaft or slope.
A cap piece.
References in periodicals archive ?
Tenders are invited for Procurement Of Spares For Headblock Of Rmgc
The primary work elements include: selective replacement of deteriorating deck panels; partial or full depth concrete spall repairs; joint header, abutment headblock and joint riser bar replacement or repairs; armored joint modification; joint seal installation or replacement; parapet, safety walk, and curb surface repairs with provisions for temporary electrical lighting service; parapet and deck replacement including new electrical conduits and service; provisions for restoration of traffic loop detectors; and removal and replacement of existing asphalt wearing surface with a new membrane-asphalt system or with a high density, impermeable, cementitious overlay.
The project involves the refurbishment of a Nelcon STS crane, with scope of work including the replacement of the electrical control system (PLC and DC drives), main dynamic brakes, wire ropes, spreader pulley sheaves and headblock.
He was immobilised with the use of a scoop stretcher and headblocks and was flown to the major trauma centre at University Hospital Coventry and Warwickshire.
The headblocks and water cooled platens are 35% thicker than those found on typical presses.