An accumulation of waste material such as rock or bone, either on the
surface or underground. Syn:gob dump
A more or less unflattering term applied to a talkative miner, used much
in the same sense as "soapbox orator." BCI
Eng. A gallery or road extended through goaf or gob.
Eng. A form of the longwall system of working coal, in which all the main
and branch roadways are made and maintained in the goaves. Fay
Space left for stowing gob.
A rough wall of flat stones built to prevent the piles of gob from
obstructing the passage of air.
a. A device used to scrape and descale pipes carrying solids, pulps,
sludges, slurries, and other deposit-forming liquors. Pryor, 3
b. A rude sledge upon which one end of a log is borne, the other end
trailing on the ground; tieboy; also, a rough, strong wagon used in the
woods and about quarries. Standard, 2
c. An iron rod dropped down a well to explode a charge of nitroglycerin.
Mersereau, 2
d. See:bullet
In the United States, a term for gravity haulage. Nelson
A furnace with an annular hearth for roasting sulfide ores; used in Wales.
Fay
An orthorhombic mineral, alpha-Fe3+ O(OH) ; polymorphous with
akaganeite, feroxyhyte, and lepidocrocite; dull to adamantine, varicolored
with yellow ocher streak; a common weathering product of iron-bearing
minerals; precipitates in bogs and springs; a major constituent of
limonite and gossans, and a source of iron and a yellow ochre pigment. A
hydrous oxide mineral of iron. Also spelled goethite, gothite. Formerly
called allcharite; xanthosiderite. CF:bog iron
a. Corn. A surface working in which the material is thrown from one
platform to another. Hess
b. Corn. A long narrow surface working. See also:coffin
Copper-bearing iron, very low in impurities and in carbon (0.02% maximum),
containing about 0.25% copper. Bennett
Scot. Working, for example, a going place. A room in the course of being
worked.
a. A roadway to the coal face in bord and pillar working. CTD
b. Eng. The bord or headway used as a main road for conveying the tubs to
and from the face to a flat. See also:flat
SMRB
c. N. of Eng. A bord (room) down which coal is trammed, or one along which
the coal from several working places is conveyed into the main haulage.
Fay
A headway or bord laid with rails, and used for conveying the coal cars to
and from the face. Zern
The act or process of lowering the drill string, a string of pipe, or
casing into a borehole. Long
A borehole, the course of which is deviating from that intended. Also
called drifting; walking; wandering. Long
A working place in a coal mine which is being pushed forward, as distinct
from an old or disused place. CTD
An ancient and famous group of diamond mines on the Kistna River, India,
where the Koh-i-noor and other world-famous diamonds were found.
Hess
a. An isometric mineral, native 4[Au] ; commonly alloyed with silver or
copper, possibly with bismuth, mercury, or the platinum-group metals;
metallic yellow; soft and malleable; sp gr, 19.3 if pure; occurs in
hydrothermal veins with quartz and various sulfides; disseminated in
submarine massive effusives and in placers or nuggets, fines, and dust.
b. Found in nature as the free metal and in tellurides; very widely
distributed. Symbol: Au. Occurs in veins and alluvial deposits; often
separated from rocks and other minerals by sluicing and panning
operations. Good conductor of heat and electricity. Used in coinage,
jewelry, decoration, dental work, plating, and for coating certain space
satellites. It is a standard for monetary systems in many countries.
Syn:palladium gold
A variety of native gold containing mercury and silver, with gold
averaging approx. 40%, commonly associated with platinum in
yellowish-white grains that crumble easily. CF:amalgam