The mining of metals and minerals on locations other than the Earth
through space colonization of planets and moons. SME, 1
Sometimes affect employment in alien countries by giving immunity from
some laws. May affect working conditions. Pryor, 3
a. The emission of relatively viscous lava onto the Earth's surface; also,
the rock so formed. CF:effusion
b. The operation of producing rods, tubes, and various solid and hollow
sections, by forcing heated metal through a suitable die by means of a
ram; applied to numerous nonferrous metals, alloys, and other substances.
CTD
c. The act or process of extruding; thrusting or pushing out; also, a form
produced by the process; a protrusion. Webster 3rd; Webster 2nd
d. The emission of magmatic material (generally lavas) at the Earth's
surface; also, the structure or form produced by the process, such as a
lava flow, a volcanic dome, or certain pyroclastic rocks. AGI
e. Lava or mud forced out, as through a vent or fissure, onto the Earth's
surface. Webster 3rd
f. Plastic clay forced through a mouthpiece of a pugmill or a press,
forming a rod or a tube, which can be cut to the desired length.
Rosenthal
Said of igneous rock that has been erupted onto the surface of the Earth.
Extrusive rocks include lava flows and pyroclastic material such as
volcanic ash. An extrusive rock. CF:intrusive
volcanic; eruptive. AGI
The action by which all or a portion of the low-melting constituent of a
compact is forced to the surface during sintering. Sometimes referred to
as "bleed out." Syn:sweating
A price quoted ex vessel used in connection with a port name means all
costs paid until free of the ship's tackle at the port designated.
Hess
a. The top or mouth of a shaft. BS, 8
b. The central or intake opening of a radial-flow fan. BS, 8
c. The entrance to a mine working at which daylight can be seen from
within. Pryor, 3
d. The hole in a pick or hammer head, that receives the handle.
Fay
e. The opening at the top of a beehive coke oven for charging.
Mersereau, 2
f. The opening in the bottom of a pot furnace through which the flame
enters. ASTM
Agate displaying concentric bands, commonly of various colors, about a
dark center suggesting an eye. Also called Aleppo stone.
A rod or bolt having an eye or loop at one end and threaded at the other
end. Long
A window or other opening in a tuyere through which the operator can see
into the melting zone of the blast furnace. Mersereau, 2
A triclinic mineral, Na4 B10 O17 .7H2 O ;
associated with kernite, borax, and tincalconite at the
Tincalayu borax mine, Salta province, Argentina.
A monoclinic mineral, CaB3 O5 (OH) ; colorless; fluoresces
brownish-yellow under UV light; Mohs hardness, 6; associated with halite,
anhydrite, and howlite in a rock-salt drill core at Rehden, Diepholz,
Germany.
May be described as the father of freefall drilling systems, all others
having originated from it, although it is not now used in its original
form. See also:free fall
a. The spatial arrangement and orientation of the components (crystals,
particles, cement) of a sedimentary rock. CF:packing
b. The complete spatial and geometrical configuration of all those
components that make up a deformed rock. It covers such terms as texture,
structure, and preferred orientation. Syn:rock fabric
A company which transforms refined metal (and sometimes scrap as well)
into semifabricated products, (e.g., wire, cable, tubes, strip, rods) for
sale to an end-consumer. Also called semifabricator. Wolff
A component of a rock fabric that acts as a unit in response to
deformative forces.
A collector that utilizes a fabric or cloth to remove dust particles from
the air. The basic idea is the same as that employed in vacuum cleaners,
but there is usually an automatic or self-cleaning feature for recovering
the dust. Fabric-type dust collectors should not be subjected to
excessively abrasive or corrosive materials, or high temperatures that
might injure the fabric, unless special materials have been employed for
that purpose. Bags and tubes employing glass filter fabric are capable of
handling gases with temperatures up to 550 degrees F (288 degrees C), and
also can withstand the action of many corrosive gases. Fabric-type
collectors fall into two groups on the basis of design. One uses the
fabric in a closed bag or a series of small-diameter bags commonly called
tubes, while the other has the fabric on a frame like a screen.
Pit and Quarry
a. The surface of an unbroken coal bed at the advancing end of the working
place.
b. Sedimentary beds are said to face in the direction of the stratigraphic
top of the succession (or to be directed toward the younger rocks or to
the side that was originally upward), so that an overturned bed facing to
the east may have a dip of 45 degrees to the west. Folds are said to face
in the direction of the stratigraphically younger rocks along their axial
surfaces and normal to their axes; this coincides with the direction
toward which the beds face at the hinge (a normal upright fold faces
upward, an overturned anticline faces downward, and an asymmetric fold
faces its steeper flank). Faults are said to face in the direction of the
structurally lower unit. AGI
c. The principal cleavage plane of coal, at right angles to the
stratification.
d. The exposed surface of a coal or ore deposit in the working place where
mining is proceeding. See also:coal face; face height; working face.
e. An edge of rock used as a starting point in figuring drilling and
blasting. Nichols, 1
f. The part of a bit in contact with the bottom of a borehole, when
drilling is in progress, that cuts the material being drilled; cutting
face. Long
g. To dress a bit.
h. The bottom of a drill or borehole.
i. The original upper surface of a layer of rock, esp. if it has been
raised to a vertical or a steeply inclined position.
j. The plane surface of a mineral crystal.
k. The surface exposed by excavation. The working face, front, or forehead
is the face at the end of the tunnel heading, or at the end of the
full-size excavation.
l. A cleat or back. Fay
m. The smooth surface of the coal as contrasted to butt.
n. The main cleavage; bord cleat. Mason
o. The more or less vertical surface of rock exposed by blasting or
excavating, or the cutting edge of a drill hole. Nichols, 1
p. The width of a roll crusher. Nichols, 1
q. The outer surface of a pulley in contact with a belt; the outer surface
of a gear, roll, or drum usually expressed in terms of inches of width.
r. The end of a drive. Gordon
s. In structure, the original upper surface of a stratum esp. if it has
been raised to a vertical or a steeply inclined position. AGI
The operation of directing the intake air to and along the working face of
a mine. The term was used in the early part of the 18th century to
describe the coursing of air naturally induced in a coal mine.
See also:circulation of air
The working area in from the last open crosscut in an entry or a room,
including the pillar being extracted or longwall being mined.
A light belt conveyor employed at the face. It is the type generally used
in conventional machine mining. Nelson