ROOF BOLTER

Domain	Definition
Mining	In bituminous coal mining, one who reinforces roofs of mine haulageways, side drifts, and working places with metal or timber to prevent rock and slate falls. Also called raise driller; stoperman; stoperperson;timberman. (references)
Occupations	Operates self-propelled machine to install roof-support bolts in underground mine: Positions safety jack to support roof until bolts can be installed. Drives machine into position, inserts bit in drill chuck, and starts drill. Moves lever to advance bit into roof at specified distance from rib or adjacent bolt. Removes bit from chuck and replaces with bolt. Starts hydraulic action which forces bolt into hole. Starts rotation of chuck to turn bolt and open expansion head to exert pressure upon rock formation. Tests bolt for specified tension, using torque wrench. May install truss bolts traversing entire ceiling span and tighten ends of anchored truss bolts, using turnbuckle. (references)
Source: compiled by the editor from various references; see credits.

Anagrams: ROOF BOLTER

Scrabble® Enable2K-Verified Anagrams
	Words within the letters "b-e-f-l-o-o-o-r-r-t"
	-3 letters: floorer, footler, forbore.
	-4 letters: befool, bolero, bolter, floret, foetor, footer, footle, lofter, looter, reboot, reroof, retool, rolfer, roofer, rooter, tooler, torero.
	-5 letters: borer, botel, fetor, floor, forte, frore, obole, ofter, retro, roble, robot, rotor.
Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro.