a. To break up by the action of chemical and/or mechanical forces.
AGI
b. To separate or decompose into fragments; to break up; hence, to destroy
the wholeness, unity, or identity. Ballard
The breaking up and crumbling away of a rock, caused by the action of
moisture, heat, frost, air, and the internal chemical reaction of the
component parts of rocks when acted upon by these surface influences.
See also:mechanical weathering; chemical weathering.
CF:putrefaction
a. A mill for comminuting materials to a fine dry powder such as by impact
breaker. Nelson
b. A machine for reducing by means of impact the particle size of the coal
or pitch binder, or both. Also called beater. CF:impact mill;
hammermill. BS, 5
See:tappet
A reagent dispenser used in the flotation process. Cups, mounted around
the periphery of a slowly rotating disk driven by a fractional horsepower
motor, dip into a reservoir of reagent and upon rising deliver a closely
controlled quantity to the process, usually to conditioners.
Pryor, 3
A coal cutter whose cutting unit consists of a disk or wheel, armed at its
periphery with cutters. The first disk machine, with detachable picks, was
patented in 1861. The disk coal cutter is obsolescent. Nelson
An axial-flow fan with a series of blades formed by cutting and bending
flat sheets or plates. When rotated, the disk imparts to the air a motion
along the axis of the fan shaft. Strock, 2
A feeder consisting of a rotating horizontal metal disk under the opening
of a bin such that the rate of turning or opening of the gate governs the
quantity delivered. Also called rotary table feeder, rotary feed table.
See also:plate feeder
A continuous dewatering filter in which the membrane (filter cloth) is
stretched on segments of a disk. These disks rotate through a tank of
slurry. The vacuum inside the disk draws the liquid through the cloth to
discharge; the solids forming a cake on the filter cloth are lifted clear
of the slurry tank and separately discharged, by application of air
pressure behind the filter cloth. Pryor, 3
See:grizzly
A laboratory grinding mill with two circular plates almost parallel, of
which one is fixed while the other rotates. Ore fed centrally between the
plates is ground and discharged peripherally. The disk breaker
(obsolescent) had two saucer-shaped disks working in similar fashion.
Pryor, 3
a. Displacement. AGI
b. The shifting of the relative position of a boulder in a borehole or of
the rock on either side of a crack or fissure cutting across a borehole.
Long
c. The offset in a borehole. Also called deviation; throw. Long
d. A general term to describe a break in the strata, for example, a fault.
A washout is a disturbance but not a dislocation. Nelson
e. The displacement of rocks on opposite sides of fracture.
Pryor, 3
f. In metallurgy, the structural defect in metal or crystal produced by
distortion. Pryor, 3
g. A linear crystal defect. Van Vlack
A state where different ions are distributed randomly in identical
structural positions. See also:long-range order
CF:crystal defect; volume defect.
a. An employee who controls or keeps track of the traffic on haulageways
and informs workers when to move trains or locomotives. BCI
b. See:motor boss
c. A person or electronic device that routes haulage trucks to shovels or
directs trucks from shovels to one of several destinations: ore pass,
crusher, or spoil embankment.
A system employing radio, telephones, and/or signals (audible or visual)
for orderly and efficient control of the movements of trains of cars in
mines.
See:dispersing agent
An element that is generally too rare and unconcentrated to become an
essential constituent of a mineral, and that therefore occurs principally
as a substituent of the more abundant elements. AGI
In geochemical prospecting, a pattern or the distribution of the metal
content of soil, rock, water, or vegetation. AGI
Homogeneous phase (gas, liquid, or solid) through which particles are
dispersed to form a relatively stable sol. Mainly descriptive of colloidal
dispersion. See also:disperse system
A two-phase system consisting of a dispersion medium and a dispersed
phase; a dispersion. Webster 3rd
The ease with which dust is raised into suspension. Sinclair, 1