See:rock association
Ratio of absolute viscosity to mass density. Measured in square meters per
second. Hartman, 2
The form of mechanical energy a body possesses by virtue of its velocity.
The kinetic energy of a body, or the energy of motion, is the work done by
it, or against it, in coming to rest. Water flowing through pipes or air
flowing through a mine roadway possesses kinetic energy.
See also:velocity head
The energy of flowing water that is a function of its velocity.
A type of metamorphism that produces deformation of rocks without chemical
reconstitution or recrystallization to form new minerals. AGI
a. The bolt with which a cage is attached to the hoisting cable. It
supports the suspended cage.
b. A large bolt that holds the upper end of the tripod legs together and
from which the sheave-wheel clevis is suspended. Long
Special, hollow, cylindrical fireclay brick, between the bottom fountain
brick and the first lateral brick in a bottom-pour ingot assembly.
See also:bottom-pour ingot assembly
In a wide excavation where strutting is required, this is a long pile
driven at the strut spacing in the center of the trench before excavation
is started. Hammond
A vertical member of a stamp battery frame that carries the camshaft.
CTD
A drum-type screen in which the pulp to be screened is delivered on the
outside, the undersize passing through the screen and discharging through
the open end. Liddell
a. A sharp angular deflection in a borehole. Long
b. A deflection in a vein or lode that does not interrupt its continuity.
c. Scot. A twist in a rope; a doubling and interlocking of several links
in a chain. Fay
Microscopic to macroscopic deformation lamellae in mineral grains; e.g.,
quartz, pyroxene, mica, kyanite, resulting from plastic flow under
tectonic strain. Also called translation gliding.
Orbicular jasper containing spherical inclusions of colorless or nearly
colorless quartz.
A coarse-grained metamorphic rock of pelitic composition occurring in the
granulite facies. Essential minerals are garnet and biotite, with which
occur varying amounts of quartz, K-feldspar, oligoclase, muscovite,
cordierite, and sillimanite. The name is from Kinzig, Schwarzwald,
Germany. AGI
a. N. of Eng. A level or gently sloping roadway, at the extremity of an
engine plane, upon which the full cars stand ready to be sent up the
shaft. The tubs, or cars, usually go to the shaft by gravity. Fay
b. A load of 1,000 lb (454 kg). ASM, 1
Natural asphalt at the surface, Russia.
A machine for dry cleaning coal. Raw coal is fed onto a perforated plate
inclined at 12.5 degrees to 15 degrees to the horizontal. A pulsating air
current is applied to the underside of the inclined plate, which
stratifies the material, the coal forming the upper layer with the dirt
below, which then passes into separate compartments. The Kirkup table
gives a three-product separation; i.e., coal, middling, and reject.
See also:pneumatic jig; pneumatic table; S.J. table. Nelson
A magnesian variety of melanterite. CF:jarosite
A borehole-inclination survey method whereby the electrolytic deposition
of copper from a solution is used to make a mark on the inside of a metal
container. CF:acid-dip survey
N. of Eng. To undercut. See also:kerve; kerf. Fay
a. Newc. The cutting made at the bottom of the coal by the miner.
See also:holing
b. Eng. Undercutting the coal horizontally, usually by hand. Also called
laying-in; ligging-in; holing. SMRB