Pertaining to a layered-mineral structure of the kaolinite-serpentine,
talc-pyrophyllite, mica, or chlorite groups in which all three of the
positions with octahedral coordination are occupied, mainly by divalent
cations, such as Mg, or by a mix of monovalent and trivalent cations, such
as Li and Al. CF:dioctahedral
a. A small train of mine cars. Korson
b. The number of cars moved at one time by a transportation unit.
Hudson
c. The operation in rotary drilling of pulling out (trip out) and running
in (trip in) the drill string, as required to replace a worn bit, extract
a core, or recover a fish. Syn:round trip
d. An automatic arrangement for dumping cars; a tipper, a kickup.
Fay
e. A release catch. Nichols, 1
A term used in mine transportation for the period during which the loads
(loaded mine cars) are taken away and a fresh trip of empties is brought
back. This period is known as trip change in contrast to car change. In
this interval a great deal of potential loading time can be lost.
Kentucky
A device for opening protective equipment or a circuit breaker, operated
by a solenoid. Hammond
a. A mineral form with the outward appearance of tripe or intestines,
e.g., stalactitic calcite, crumpled gypsum laminae, contorted
concretionary anhydrite, barite. Also spelled tripe stone.
b. Stalactite resembling intestines. Arkell
c. A variety of gypsum formed of crumpled, alternating laminae of pure
white gypsum and gray argillaceous gypsum. Arkell
d. A contorted concretionary variety of anhydrite. Fay
A power hammer operated by a tripping mechanism that causes the hammer to
drop. Crispin
A former name for spodumene.
An orthorhombic mineral, 4[LiFe2+ (PO4 )] , with manganese
replacing iron toward lithiophilite; bluish to greenish gray; in granite
pegmatites.
A removable self-contained mine lamp, designed for marking the rear end of
a train (trip) of mine cars.
A system of opening a mine by driving three parallel entries for the main
entries. See also:main entry
triple-entry room-and-pillar mining
See:room-and-pillar
An invariant point at which three phases coexist in a unary system. When
not otherwise specified, it usually refers to the coexistence of solid,
liquid, and vapor of a pure substance. AGI
An assembled stone of two main parts of gem materials bonded by a layer of
cement or other thin substance (the third part of the triplet), which
gives color to the assemblage. CF:doublet; emerald triplet.
A name for emerald-colored beryl triplet. See also:emerald triplet
A special core barrel used to take soil samples, as in foundation testing.
The inner tube is swivel mounted and nonrotating and extends through, and
a short distance beyond, the bit. Hence, the bit only cuts clearance for
the outer tube or core-barrel assembly, and the core taken by the inner
tube is cut by a spudding action. The triple or core tube is mounted
inside the inner tube to receive the core and is split longitudinally to
facilitate removal of the core. Also called clay barrel. Long
A patented form of laminated glass. See also:safety glass
A method of steelmaking that involves the use of three processes, e.g., a
sequence of melting in a cupola, blowing in a Bessemer converter, and
finishing in a basic electric furnace, or a combination of the acid
Bessemer converter, the basic open-hearth furnace, and the basic electric
furnace. Osborne
A positive-displacement piston pump having three water cylinders mounted
side by side. It may be either a single- or double-action type.
CF:duplex pump
A monoclinic mineral, 8[(Mn,Fe,Mg,Ca)2 (PO4 )(F,OH)] ;
brown; forms fibrous masses; in granite pegmatites.
Syn:pitchy iron ore
A monoclinic mineral, (Mn,Fe)2 (PO4 )(OH) ; perfect
cleavage.
A device to elevate cars on an inclined track as received from a kickback.
Zern