A monoclinic mineral, Ca2 (Mg,Fe)3 Al2 (Si6 Al
2 )O22 (OH)2 ; amphibole group, having Mg/(Mg + Fe) =
0.5 to 1.0 ; forms a series with ferrotschermakite.
A synthetic manganese tourmaline or manganoan elbaite.
A monoclinic mineral, Pb2 Cu(PO4 )(SO4 )(OH) ;
brackenbuschite group; in small, tabular, emerald-green crystals; at
Tsumeb, Namibia.
a. A tram, wagon, corf, or corve. CTD
b. A small rail-track vehicle for carrying coal or minerals, with a
capacity ranging from 10 to 25 hundredweights (453.6 to 1,134 kg). Tub is
the term used in most English mines; tram is used in South Wales; and
hutch is used in Scotland. Nelson
c. A box or bucket in which coal or ore is sent up a shaft. A keeve.
Webster 3rd
d. To line, such as in a mine shaft, with tubbing; to keep back water by
tubbing. See also:tubbing
e. A large circular base that provides the maximum practical bearing area,
and on which is mounted the revolving frame or subbase of a walking
dragline. Austin
A double-pointed pickax; a beele. Standard, 2
A person who uses a tubber. Standard, 2
a. The watertight cast-iron lining of a circular shaft built up of
segments that are fixed together with flanges. The flanges are internal
and bolted in German tubbing; they are external in English tubbing, which
gives a smooth inner face because the segments are wedged and not bolted.
The space outside the tubbing is grouted to add strength and improve
watertightness. See also:tub; suspended tubbing. Nelson
b. Eng. A lining of timber or metal for a shaft, as in a mine, esp. a
watertight shaft lining consisting of a series of cast-iron cylinders
bolted together and used to sink through water-bearing strata.
Webster 3rd
c. A shaft lining of casks or cylindrical caissons of iron or wood.
See also:plank tubbing; wooden tubbing. Fay
A small wooden wedge hammered between the joints of tubbing plates.
Zern
An airfoil (propeller) or disk fan within a cylinder and including
driving-mechanism supports either for belt drive or direct connection.
Strock, 2
A person who cleans boiler tubes. Fay
a. A clamp or clip for gripping a tube or pipe; esp., a jawed tool used in
hoisting and lowering well tubes in drilling. Standard, 2
b. A misnomer for casing clamp. Long
A revolving cylinder, usually lined with silex, nearly half filled with
glacial or water-worn flints, used for fine grinding of certain ores,
preliminary to further treatment. The material to be ground, mixed with
water, is fed through a trunnion at one end and passes out the opposite
trunnion as a slime. This is an exceptionally long mill with a relatively
small diameter. Syn:cylindrical mill
In mineral deposits, a texture in which gangue is replaced by automorphic
minerals. CF:atoll texture
A mineral exhibiting very irregular rounded surfaces, often giving rise to
gnarled, rootlike shapes. Nelson
The person who hooks or unhooks the hoisting rope to or from the buckets.
Hess
a. The tube lining of boreholes; casing. Fay
b. Hollow cast-iron segments placed in a shaft to dam water or sink
through quicksand. Also spelled tubbing. Fay
c. See:ventilation tubing
d. A small-diameter removable pipe, suspended and immobilized in a well
inside a large-diameter casing and opening at a producing zone, through
which fluids are produced (brought to the surface). AGI
e. The act or process of placing tubing in a well. AGI
f. The act of lining a deep borehole by driving down iron tubes.
See also:casing
g. A misnomer for casing. Long
h. Small-diameter removable pipe through which oil and gas are produced
from the well. Wheeler, R.R.
See:screw conveyor
See:scarbroite
A frame in timbering in which the poling boards are supported by walings
at their upper and lower ends. Hammond
The space between the blocks separating the cap in a heading set from the
poling driven. This space provides for driving a second set of poling
boards. Stauffer