a. A person employed on the laying and maintenance of rail tracks
underground. Also known as a trackman. Nelson
b. A person whose duty it is to keep the roads of a mine in order.
Fay
c. In bituminous coal mining, a general term for miners working along
haulageways or airways (roads). Usually designated according to job, as
repairman; wasteman. DOT
Crushed stone for surfacing macadamized roads, and for the base course of
asphalt and concrete roadways; also used without asphaltic binder as the
traffic-bearing surface, generally on secondary roads. AGI
A method of preparing aggregates for bituminous surfaces in which the
aggregates and bitumen are combined on the surface of the road, using the
penetration or mixed-in-place method. Pit and Quarry
Power-driven roller of any weight from one-half to 12 tons.
Hammond
A pack built alongside a roadway. See also:rib-side pack
Nelson
Low-priced model of a scraper or a truck. Nichols, 1
An underground drivage. It may be a heading, gate, stall, crosscut, level,
or tunnel and driven in coal, ore, rock or in the waste area. It may form
part of longwall or bord-and-pillar workings or an exploration heading. A
roadway is not steeply inclined. See also:roadway support
Nelson
An electric cable designed for use in mine roadways. It may be either
rubber insulated, sheathed, and armored or paper insulated. Nelson
To bind the floor dust together with water and calcium chloride flakes, or
other chemical, to form a firm plastic carpet.
See also:dust consolidation
A timber, steel, concrete, or other erection in a roadway to (1) ensure
safety by preventing falls of ground, and (2) maintain the maximum
possible roadway size by resisting the tendency of the roadway to contract
and distort. See also:steel arch; roadway. Nelson
To heat to a point somewhat short of fusing, with access of air, as to
expel volatile matter or effect oxidation. Fay
A reverberatory furnace or a muffle used in roasting ore.
Standard, 2
Slag resulting from the calcination of white metal in the process of
copper smelting. Standard, 2
a. Heating an ore to effect some chemical change that will facilitate
smelting. ASM, 1
b. The operation of heating sulfide ores in air to convert to oxide or
sulfate. CTD
c. Calcination, usually with oxidation. Good, dead, or sweet roasting is
complete roasting; i.e., it is carried on until sulfurous and arsenious
fumes cease to be given off. Kernel roasting is a process of treating poor
sulfide copper ores, by roasting in lumps, whereby copper and nickel are
concentrated in the interior of the lumps. Fay
d. The heating of solids, frequently to promote a reaction with a gaseous
constituent in the furnace atmosphere. See also:magnetizing roast
ARI
The treatment of metal ore in a reverberatory, by first partly roasting at
a low temperature and then partly fusing the charge at a higher
temperature, which causes a reaction between the lead oxide formed by
roasting and the remaining sulfide, producing sulfurous acid and metallic
lead. Syn:air-reduction process
roasting and reduction process
The treatment of lead ores by roasting to form lead oxide, and subsequent
reducing fusion in a shaft furnace. Fay
A furnace with a rotating cylinder for roasting, amalgamating, or smelting
ore. See also:Bruckner furnace
A furnace in which finely ground ores and concentrates are roasted to
eliminate sulfur or other elements or compounds; heat is provided by the
burning sulfur. The essential feature is free access of air to the charge,
by having a shallow bed that is continually rabbled. Many types have been
devised; multiple hearth is the most widely used. CTD
See:blast roasting
A form of roasting furnace, built in compartments or stalls open in front,
with flues running up the wall at the back for the purpose of creating a
draft.
Q k k K5 DICTIONARY TERMS:rob To extract mine pillars previously left for sup
[\B]rob[\N]
a. In anthracite and bituminous coal mining, one who breaks down and rips
out with a pick, pillars of coal left to support the roof in rooms when
the usual mining was being done. Also called pillar robber. DOT
b. An extra cathode or cathode extension that reduces the current density
on what would otherwise be a high current-density area on the work.
ASM, 1