Conductor made of wood, iron or steel, or wire rope; used to guide the
cages in the shaft and to prevent them from swinging and colliding with
each other while in motion. See also:guides; fixed guides; rope guide.
Nelson
Also known as a disintegrator; used for secondary crushing of stone and
gravel, and for reduction of slag, fertilizers, etc.
Pit and Quarry
a. One who directs station operations and movement of cages used to raise
and lower workers, mine cars, and supplies between various levels and
surface; works at the top of a shaft or at an intermediate level inside a
mine. Also called cageman; cage tender; shaft headman; skip tender.
See also:banksman; hitcher; top cager; onsetter. DOT
b. A power-operated ram for pushing mine cars into or out of cages at the
pit top or pit bottom. Nelson
c. One who supervises weighing and the sequence of sending up components
of a furnace charge, keeps tally of the number of charges, and signals to
the top filler when it is time to hoist. Fay
In bituminous coal mining, one who works with a cager, coupling and
uncoupling cars at a shaft station. DOT
Scaffolding, sometimes fitted with strong springs, to take the shock, and
on which the cage rests when reaching the pit bottom or other landing.
Fay
Short prop or catch on which a cage stands during caging or changing cars.
Zern
One of the fittings bolted to the side of a cage to engage the rigid
guides in a shaft. Usually there are two for each guide, one at the top
and one at the bottom of the cage. The shoes are usually about 1 ft (0.3
m) long and shaped to fit closely around about three-quarters of the
guide, with sufficient clearance for free movement but not sufficient to
allow the shoe to come off the guide. Nelson
Equipment fitted on the cage floor to hold the car in position while
traveling in the shaft. Spring- or rubber-mounted stops are commonly used.
See also:kep
A baguette; an oblong cut diamond. Hess
A tetragonal mineral, Ca2 B(AsO4 )(OH)4 ; forms white
sphenoidal crystals.
See:Cenozoic
An artificial mound of rocks, stones, or masonry, usually conical or
pyramidal, used in surveying to aid in the identification of a point or
boundary. AGI
Smoky-yellow or brown varieties of quartz, the coloring matter probably
due to some organic compound; named from Cairngorm in the Scottish
Grampians; the more attractively colored varieties are used as
semiprecious gem stones. Also called smoky quartz, smokestone. CTD
In sampling placer deposits, a caisson drill is driven by a combination of
rotational impact and the weight of the drilling equipment. SME, 1
A method of sinking a shaft through wet clay, sand, or mud down to firm
strata. Cast-iron tubbing, attached ring by ring on the surface, is
gradually lowered as the shaft is excavated. There is a special airtight
working chamber at the bottom of the lining. A cutting shoe at the lower
end of the tubbing helps it to penetrate the soft ground. The caisson
method is obsolescent, being replaced by the freezing method, etc.
See also:concrete caisson sinking
Nelson
a. See:box canyon
b. A defile leading up to a mountain pass; also, the pass itself. Etymol:
Spanish cajon, large box. The term is used in the Southwestern United
States. AGI
a. The solid residue left in a filter press or on a vacuum filter after
the solution has been drawn off.
b. Solidified drill sludge. Long
c. That portion of a drilling mud adhering to the walls of a borehole.
Syn:wall cake
d. See:cake of gold; mud cake.
e. To form in a mass such as when ore sinters together in roasting, or
coal cakes together in coking.
Copper cast in a round, cake-shaped mass. See also:tough cake
Hess
Dust particles with sufficient cohesion that a light stroke with a brush
or a light airblast, such as from the mouth, will not cause the dust to be
dispersed.
Gold formed into a compact mass (though not melted) by distillation of
mercury from amalgam. Also called sponge gold. Syn:cake
The measure of the thickness of the filter cake deposited against a porous
medium. Cake thickness and water loss constitute the determining factors
of filtration qualities.