A method of logging boreholes by observing the natural radioactivity of
the rocks through which the hole passes. It was developed for logging
holes that cannot be logged electrically because they are cased.
AGI
See:rosickyite
A metamict variety of zircon that is nearly amorphous owing to radiation
damage; it has lower density than crystalline zircon.
a. A train or set of mine cars or trams.
b. A mine.
c. A set of miners.
d. Gangue.
A car that may be loaded with a block of stone and placed beneath the
blades of a gang saw. It is a substitute for the stationary saw bed.
Fay
A set of drills in the same machine operated together. Standard, 2
A work gang foreman. Webster 3rd
In the stonework industry, one who attaches and detaches crane slings or
hooks to and from blocks or slabs of granite, marble, and stone in loading
the stone on gang saw cars or trucks and pulling them under the gang saws.
DOT
In bituminous coal mining, one who works in a group that pools its
earnings regardless of the type of work performed (drilling, undercutting,
blasting, or loading coal). DOT
The valueless minerals in an ore; that part of an ore that is not
economically desirable but cannot be avoided in mining. It is separated
from the ore minerals during concentration. CF:ore mineral
a. A main haulage road underground. Frequently called entry.
Hudson
b. A passageway driven in the coal at a slight grade, forming the base
from which the other workings of the mine are begun. Korson
c. A passageway or avenue into or out of any enclosed place, as in a mine.
d. An elevated roadway. CTD
e. Pennsylvania. Generally confined to anthracite mines. Jones, 1
f. Newc. A wooden bridge.
A cable designed to be installed horizontally (or nearly so) for power
circuits in mine gangways and entries.
a. A hard, fine-grained quartzose sandstone or quartzite, used in the
manufacture of silica brick. It is composed of subangular quartz
particles, cemented with secondary silica, and possessing a characteristic
splintery fracture. Ganister is distinguished from chert by its more
granular texture and by the relatively small quantity of chalcedonic or
amorphous silica. AGI
b. A mixture of ground quartz and fireclay used as a furnace lining. Also
spelled gannister. AGI
c. See:quartzite
N. of Eng. A road (heading) down which coal is conveyed in cars running
upon rails. An inclined gangway in a coal mine. Fay; Standard, 2
A narrowing of two single railway tracks almost into the space of one, as
on a bridge or in a tunnel, without breaking the continuity of either
track by a switch, the two tracks overlapping each other.
Standard, 2
a. A frame erected on a gold dredge for supporting different parts of the
machinery. Also spelled: gauntry; gauntree.
b. A bridge or platform carrying a traveling crane or winch and supported
by a pair of towers, trestles, or side frames running on parallel tracks.
Webster 3rd
c. An overhead structure that supports machines or operating parts.
Nichols, 1
d. An upward extension of a shovel revolving frame that holds the boom
line sheaves. Nichols, 1
Construction program for major engineering works, set out in graphic form.
Down the vertical axis in sequence are set out the items concerned. The
abscissa shows the period covered in days, or weeks, and the period
allowed for each item marked by a horizontal line. The chart displays the
interrelation between the items, and aids in ensuring that no item is so
delayed as to impede progress on a later one that depends on it.
Pryor, 3
In a fault, the horizontal component of separation measured parallel to
the strike of the strata, with the faulted bed absent from the measured
interval. AGI
Maximum aperture at entry to a coarse crushing machine at which the
largest piece of rock fed to it can be gripped and acted on by the
breaking system. Pryor, 3
A method of packing for road maintenance that consists of gate side packs
3 to 5 yd (2.7 to 4.6 m) wide, next a gap of at least the width of the
road, and finally a large pack 5 to 7 yd (4.6 to 6.4 m) wide. The waste
packs are made at least 2 yd (1.8 m) wide and not less in width than twice
the thickness of the seam. The gaps provided in strip packing are kept
clear of supports and allow the roof to break up and flow toward them.
This puts the strata in tension over the roads and reduces fracture and
crush. Mason
The maximum distance for propagation between standard cartridge sizes
separated by an air gap. CF:sympathetic detonation