The rescuing of miners overcome by a mine fire, or trapped in workings by
an explosion, necessitates the use of apparatus that will enable the
rescue team to work in irrespirable or poisonous gases. The equipment used
is known as mine rescue apparatus. See also:rescue apparatus
Nelson
One of a number of railway cars specially equipped with mine rescue
apparatus, safety lamps, first-aid supplies, and other materials,
maintained by the Mine Safety and Health Administration in various
sections of the United States. These cars serve as movable stations for
the training of miners in the use of mine rescue apparatus, and in first
aid to the injured; as centers for the promotion of mine safety; as
emergency stations for assisting at mine fires, explosions, or other
disasters. Similar cars are maintained by a number of mining companies.
Syn:mine-safety car
A crew consisting usually of five people who are thoroughly trained in the
use of mine rescue apparatus, and are capable of wearing it in rescue or
recovery work in a mine following an explosion, or to combat a mine fire.
Fay
A name given to a particular type of electric safety hand lamp used in
rescue operations. It is equipped with a lens for concentrating or
diffusing the light beam as occasion may require. Fay
a. The resistance offered by a mine to the passage of an air current. The
mine resistance is due to the friction of the air rubbing along the sides,
top, and bottom of the air passages. To overcome this friction, the total
ventilating pressure must be applied against the airway and this pressure
must be equal to the mine resistance. Mine resistance is caused by the
dragging of the air against the mine surfaces and other obstructions. The
rougher the mine surfaces and the more the obstructions, the greater the
resistance to the flow of air. Kentucky
b. Includes any natural ventilation effect present and is calculated from
air volume and total pressure. The standard practice in the United Kingdom
is to express the resistance of a mine in square feet of equivalent
orifice. Roberts, 1
Any mine track used for general haulage. Fay
A more or less altered rock found in ore channels. Gangue.
The study of mineral associations in the broadest sense, such as the
correlation of igneous rocks or magmatic provinces with their ore
deposits. AGI
The origin and growth of minerals. Challinor
a. An area in which mineralization has been active at one or more periods.
If the mineralization has been chiefly metalliferous, the term
metallogenetic is applicable. Syn:metallogenetic province
b. A region characterized by relatively abundant mineralization dominantly
of one type. AGI
The row of drill holes in a tunnel face, located below the breaking-down
holes. Stauffer
An iron bar pointed at one end, chisel-edged at the other, used in coal
mining. Standard, 2
A wood or iron box located in or near the working place of a miner in
which tools, supplies, etc. are kept. Required by law in some States.
Fay
An underground surveying instrument for measuring and setting out angles
and determining magnetic north. Syn:mine dial
A portable form of dip needle used for indicating the presence of magnetic
ores. Also called dipping compass. CTD
a. A lamp for mounting on a miner's cap and receiving electric energy
through a cord which connects the lamp with a small battery.
b. An electric lamp designed for fixing to a miner's helmet. Its principal
parts are: (1) the battery, either lead acid or alkaline; (2) the
headpiece, of plastic or aluminum alloy, with switch; and (3) a length of
twin-cord cable covered with tough rubber or with neoprene--a fire- and
acid-resisting substitute. The lead-acid lamps commonly use either a 4-V,
1.0-A bulb with a light output of about 47.5 lumens or else a 4-V, 0.8-A
bulb of 38 lumens output. The headpiece is equipped with an auxiliary, 4
V, 0.46-A bulb. Nelson
A hammer for breaking ore. Standard, 2
A self-contained mine lamp with a handle for convenience in carrying.
Cap made of rigid, strong materials such as vulcanized fiber, glass fiber
or plastic, which protects a worker from injury caused by falling objects,
large chips, or by striking the head against projecting materials. The cap
has a cradle to cushion the shock of blows and a sweat band to absorb
perspiration; it is water resistant and nonconductive. A front visor
shields the face and eyes from overhead glare, and makes the cap suitable
for wear in close, confined spaces where a full brim might interfere.
Best, 1