A water, gas, or aqueous, chemically impermeable material placed in
artificially constructed underground channels, crevices, or slices.
Lombardi
The theory of the origin of coal that holds that a coal was formed at the
place where the plants from which it was derived grew.
See also:autochthonous coal
Activities conducted on the surface or underground in connection with
in-place distillation, retorting, leaching, or other chemical or physical
processing of coal or ore. The term includes, but is not limited to, in
situ gasification, in situ leaching, slurry mining, solution mining,
borehole mining, and fluid recovery mining.
Tests carried out on the ground, in a borehole, trial pit, or tunnel, as
opposed to a laboratory test. An in situ soil test may be a vane test,
dynamic penetration test, etc. Nelson
A five- or six-sided enclosure constructed in the earth by backfilling
cuts around an orebody or orebody zone with material that is impervious to
solutions so that aqueous leaching can be conducted for the extraction of
mineral values from the isolated ore. Lombardi
a. Incapable of being dissolved in a particular liquid. Shell
b. Term used of solid that does not dissolve under specified attack. No
known substance is completely insoluble, so the term refers to systems
characterized by very low solubility. Pryor, 3
c. As used in smelter contracts, the terms "insoluble" and "silica" are
often used interchangeably, but they are different things. Silica is
determined by a special fusion assay. Insoluble is the residue left after
the ore has been digested with acid in the course of assaying for some of
the metals. The insoluble is generally silica plus something else, often
alumina, since this substance is not always dissolved by acids.
Lewis
An anode that does not dissolve during electrolysis. ASM, 1
One employed to make examinations of and to report upon mines and surface
plants relative to compliance with mining laws, rules and regulations,
safety methods, etc. State inspectors have authority to enforce State laws
regulating the working of the mines. Federal inspectors have authority to
enforce Federal laws in coal mines. See also:mine inspector
Fay
A kind of injector for forcing water by steam. See also:injector
Webster 2nd
The weight of explosive detonated at any one precise time.
Cuts characterized by the drilling and ignition being done so that all the
holes can cooperate and break smaller top angles. They are called
instantaneous cuts because they are preferably ignited by instantaneous
detonators to ensure a simultaneous detonation of all the charges in the
cut. Some examples are Blasjo cut; WP-cut. Langefors
A detonator in which there is no designed delay period between the passage
of an electric current through the detonator and its explosion.
BS, 12
Term used to distinguish rapid burning from slow fuse. Ignition rate is
several thousand feet per minute, but slower than that of detonating fuse.
Pryor, 3
Institution of Mining and Metallurgy
The London Institution of Mining and Metallurgy is the central British
organization for regulating the professional affairs of suitably qualified
mining engineers engaged in production and treatment of nonferrous metals
and rare earths. Related bodies are those of Canada (Can. I.M.M.),
Australia (Aust. I.M.M.), and Republic of South Africa (Rep. S. Af.
I.M.M.). Pryor, 3
Institution of Mining and Metallurgy screen scale
Laboratory screens of usual 8-in-round (20-cm-round) size, in which the
diameter of each new wire is equal to the distance between successive
parallel wires. Therefore, in a 60-mesh screen (having 60 wires/in (152
wires/cm) measured along either the warp or the woof) the aperture is a
square measuring 1/120 in (0.21 mm) on the side. The meshes used are 5, 8,
10, 12, 16, 20, 30, 40, 50, 60, 70, 80, 90, 100, 120, 150, and 200.
Pryor, 3
The right to raise or take ore from a leased mine through the shaft or
tunnel of an adjoining mine. Ricketts
The true meaning of such expressions as shafts, tunnels, levels, uprises,
crosscuts, inclines, and sump when applied to mines signifies
instrumentalities whereby and through which such mines are opened,
developed, prospected, and worked. Ricketts
Control by servomechanisms. Use of signaling devices originating with the
process to indicate, vary, or regulate performance.
An injector for forcing air into a furnace. Webster 3rd
The zone surrounding an island extending from the line of permanent
immersion to about 100 fathoms (600 ft or 183 m) of depth, where a marked
or rather steep descent toward the great depths occurs. AGI
The declivity from the offshore border of the insular shelf at depths of
from 50 to 100 fathoms (300 to 600 ft or 91 to 183 m) to oceanic depths.
It is characterized by a marked increase in gradient. AGI