A monoclinic mineral, K3 Fe(C2 O4 )3 .3H (sub
2) O ; green; an oxalate.
A device used to measure the passage of current past a probe on each blade
of a propeller type, or each cup of a price-type meter by detecting the
change of electrical resistance between that probe and a distant
electrode. Hunt
A method for measuring the refractive index of a prism or a liquid in a
hollow prism by determining the minimum deflected angle of a light beam.
As applied to electric blasting caps, the limit below which firing will
not occur. Fraenkel
The minimum ignition energy required for the ignition of a particular
flammable mixture at a specified temperature and pressure.
Van Dolah
The U.S. Mine Safety and Health Administration and other recognized safety
and health agencies recommend 19.5% as the minimum oxygen content
allowable. Hartman, 1
minimum product firing temperature
The lowest product temperature at which an explosive or explosive unit is
approved for use. CFR, 4
The science, technique, and business of mineral discovery and
exploitation. Strictly, the word connotes underground work directed to
severance and treatment of ore or associated rock. Practically, it
includes opencast work, quarrying, alluvial dredging, and combined
operations, including surface and underground attack and ore treatment.
CF:mining geology; mining engineering. Pryor, 3
A method of mining by which the ore or coal is mined as the excavation
advances from the shaft or main opening. CF:mining retreating
Fay
a. A colony of miners settled temporarily near a mine or a goldfield.
Standard, 2
b. A term loosely applied to any mining town. Fay
Person in charge of mining operations. Craigie
A frame of a shaft, or gallery, composed of four pieces of plank.
Standard, 2
a. That portion of the public mineral lands that a miner, for mining
purposes, takes hold of and possesses in accordance with mining laws.
b. A mining claim is a parcel of land containing valuable minerals in the
soil or rock. A location is the act of appropriating such a parcel of land
according to law or to certain established rules. See also:claim;
placer claim; location.
c. In the General Mining Law of 1872, that portion of a vein or lode and
of the adjoining surface, or of the surface and subjacent material to
which a claimant has acquired the right of possession by virtue of a
compliance with such statute and the local laws and rules of the district
within which the location may be situated. Independent of acts of the U.S.
Congress providing a mode for the acquisition of title to the mineral
lands of the United States, the term has always been applied to a portion
of such lands to which the right of exclusive possession and enjoyment by
a private person or persons, has been asserted by actual occupation, and
compliance with the mining laws and regulations. Syn:holding
Ricketts
d. Distinction between mining claim and location is that they are not
always synonymous and may often mean different things; a mining claim may
refer to a parcel of land containing valuable mineral in its soil or rock,
while location is the act of appropriating such land according to certain
established rules. A mining claim may include as many adjoining locations
as the locator may make or purchase, and the ground covered by all, though
constituting what is claimed for mining purposes, will constitute a mining
claim and will be so designated. Ricketts
e. Title issued by the Government concerned to an individual or group,
which grants that individual or group the right to exploit mineral wealth
in a specified area by approved methods in accordance with the ruling laws
and regulations. Pryor, 3
f. A claim on mineral lands. AGI
An instrument giving qualitative indications of anomalies in the magnetic
field. Schieferdecker
See:dial
An accident in a mine in which a large number of people are killed.
See also:major mine disaster
See also:anthracosis; infective jaundice; nystagmus; pneumoconiosis;
silicosis; simple silicosis.
A section of country usually designated by name, having described or
understood boundaries within which minerals are found and worked under
rules and regulations prescribed by the miners therein. There is no limit
to its territorial extent and its boundaries may be changed if vested
rights are not thereby interfered with. Ricketts
A ditch for conducting water used in mining. CF:mining sluice
Craigie
a. A person qualified by education, training, and experience in mining
engineering. Nelson
b. If qualified and of standing in the profession, a trained engineer with
knowledge of the science, economics, and arts of mineral location,
extraction, concentration and sale, and the administrative and financial
problems of practical importance in connection with the profitable conduct
of mining. Usually a specialist in one or more branches of work.
Activities may include prospecting, surveying, sampling and valuation,
technical underground management, milling, assaying, ventilation control,
layout of workings and plant, geological examination, and company
administration. Pryor, 3
c. One versed in, or one who follows, as a calling or profession, the
business of mining engineering. Graduates of technical mining schools are
given the degree of engineer of mines and authority to sign the letters
E.M. after their names.
The planning and design of mines, taking into account economic, technical,
and geologic factors; also supervision of the extraction, and sometimes
the preliminary refinement, of the raw material. CF:mining;
mining geology. AGI