A barren vein. Hess
Cinder from an iron blast furnace, containing grains of iron. Fay
a. To screw two threaded members, such as drill rods, together tightly.
Long
b. To shore up with lagging; to brace. Long
Coal size designation, used for anthracite only. Buckwheat is divided into
four sizes: No. 1, or buckwheat; No. 2, or rice; No. 3, or barley; No. 4,
or barley No. 2 or silt (sometimes also called culm or slush). Buckwheat
No. 1 passes through a 1/2-in (12.7-mm) woven wire screen and over a
5/16-in (7.9-mm) woven wire screen, and through a 9/16-in (14.3-mm) round
punched plate and over a 3/8-in (9.5-mm) round punched plate. The American
Institute of Mechanical Engineers has recommended that buckwheat No. 1
shall pass through 9/16-in holes and over 5/16-in holes, a screen with
circular holes being used. See also:anthracite coal sizes
a. Circular arrangement in which finely divided ore, in water, is
delivered from a central point and flows gently to the perimeter. The
heaviest and coarsest particles settle, while the lightest overflow.
Several variants include concave buddle, with peripheral feed and central
discharge; and continuous buddles, as differentiated from those that are
periodically stopped and cleaned up. Pryor, 3
b. To separate ore from slime or stamp work by means of a buddle.
Standard, 2
A shortwall coal cutter designed for light duty on longwall power-loaded
faces and for subsidiary developments. Mason
In scuba diving, divers with few exceptions should work in pairs. This is
probably the greatest single aid toward scuba safety, esp. under
unfavorable conditions. The divers should remain in sight of each other.
In poor visibility, they should use a buddy line 6 to 10 ft (1.8 to 3.0 m)
long. Hunt
a. A pile of blasted rock left against or near a face to improve
fragmentation and reduce scattering from the next blast.
Nichols, 1
b. A substance whose purpose is to maintain a constant hydrogen-ion
concentration in water solutions, even when acid or alkalies are added.
ASM, 1
See:blanket shooting
a. A bullet or go-devil. See also:bullet
b. Syn. for vug and bug hole (slang). Long
a. The fine coal or other material resulting from a boring or cutting of a
drill, a mining machine, or even a pick.
b. Fine, dry, dustlike particles of rock ejected from a borehole by a
current of pressurized air when compressed air, instead of a liquid, is
used as a cuttings removal agent. Syn:cuttings
Long
c. Fine coal or rock material resulting from dry boring, drilling, or the
use of other cutting machines in underground work places. Long
Removing bug dust from an undercut. BCI
Pennsylvania. Said of coal moved underground in a small car. Hess
a. A four-wheeled steel car used for hauling coal to and from chutes.
b. A mine car of small dimensions, sometimes used in thin beds.
Hudson
c. Slang for a shuttle car. BCI
d. See:bug dust
See:vug
Slang for a miner's electric cap lamp. BCI
a. A stone disk mill, with an upper horizontal disk rotating above a fixed
lower one. Grist is fed centrally and discharged peripherally. Stones are
dressed periodically, channels being cut to facilitate passage. Also
applied to other rubbing mills; e.g., conical porcelain or steel ones in
which a grooved cone rotates in a close fit in a fixed casing. Also
spelled: burrmill. Pryor, 3
b. A stone mill, consisting of one stationary stone and one revolving
stone, for grinding pigment pastes. Bennett
a. A siliceous rock suitable for use as millstones; e.g., an
open-textured, porous but tough, fine-grained sandstone, or a silicified
fossiliferous limestone. In some sandstones, the cement is calcareous.
Syn:millstone
b. A millstone cut from buhrstone. Also spelled burrstone; burstone.
Syn:burr
A grinding mill with two horizontal circular stones, one revolving upon
the other, such as in an old-fashioned grain mill. Mersereau, 2
A general, nongeneric term for any rock suitable for use in construction.
Whether igneous, metamorphic, or sedimentary, a building stone is chosen
for its properties of durability, attractiveness, and economy.
See also:dimension stone
Brist. Run-of-mine coal in large quantities.