Arches built of special refractory shapes, supported by water-circulating
members.
In anthracite and bituminous coal mining, one who works on trains or trips
of cars hauled by locomotive or motor, as distinguished from rope haulage.
Also called locomotive helper; locomotive patcher; motor brakeman; motor
nipper; poleman. DOT
An elongated recess in an intake airway of a mine for servicing
locomotives. It contains two or three rail tracks (with pit space under
one), good lighting, lifting equipment, oils, benches, and tools. Where
battery locomotives are used, the garage will serve as a charging station.
Syn:underground garage; battery charging station. Nelson
The statutory maximum gradient for locomotive haulage is 1:15, but
ordinarily the practical limit is about 1:25. Roads driven specially for
locomotives are normally graded about 1:400 in favor of the load, unless a
steeper gradient is required for drainage. Nelson
The transport of coal, ore, workers, and materials underground by means of
locomotive-hauled mine cars. The locomotive may be powered by battery,
diesel, compressed air, trolley, or some combination such as
battery-trolley or trolley-cable reel.
See also:compressed-air locomotive; haulage; underground haulage.
Nelson
Shapes, used to build a burner enclosure, flash wall, and protecting walls
for the water legs.
The combined resistance caused by the friction of the journal and the
wheel tread. It can range from 12 to 20 lb (5.44 to 9.07 kg), but for
practical purposes may be taken as 15 lb (6.8 kg), as the locomotive
represents only a small portion of the total tractive effort.
Kentucky
A mineral deposit consisting of a zone of veins, veinlets, disseminations,
or planar breccias; a mineral deposit in consolidated rock as opposed to a
placer deposit. Syn:lead
See also:vein or lode claim
a. That portion of a vein or lode, and of the adjoining surface, that has
been acquired by a compliance with the law, both Federal and State. Any
dispute as to whether a given parcel of land is a vein or a lode is a
question of fact to be determined by those experienced in mining, and it
cannot be determined as a matter of law. Ricketts
b. See:vein or lode claim
c. A mining claim on an area containing a known vein or lode.
CF:placer claim
A horizontal lode.
a. A variety of magnetite showing spontaneous magnetization because of
preferential alignment of magnetic domains within a crystal or mass of
crystals. If permitted to do so, lodestone will align its polarity with
the geomagnetic field, e.g., floating on a piece of wood in water as an
early type of compass for navigation. Also spelled loadstone.
Syn:leading stone; Hercules stone; loadstar.
b. An intensely magnetized rock or ore deposit. See also:magnetite
Minerals included in a lode or vein, including economically valueless
gangue. See also:veinstuff
Tin ore (cassiterite) occurring in veins, as distinguished from stream tin
or placer tin. CF:stream tin
a. A reservoir of any size used for holding water in a mine. A sump or
standage. Also called lodgement. See also:pound
b. Eng. A subterranean reservoir for the drainage of the mine made at the
shaft bottom, in the interior of the workings, or at different levels in
the shaft. Fay
c. Scot. A cabin at the mine shaft for workers. Fay
d. The room or flat at the shaft into which the pushers or trammers empty
their loads. Standard, 2
e. S Wales. The local branch of the coal miners' union. Nelson
f. A pump room, near the pit bottom or other main pumping station.
Nelson
Scot. A room driven from a level a short distance to the dip and used for
storage of water. A sump. Fay
See:loellingite
A widespread, nonstratified, porous, friable, usually highly calcareous,
blanket deposit (generally less than 30 m thick), consisting predominantly
of silt with subordinate grain sizes ranging from clay to fine sand. It
covers areas extending from north-central Europe to eastern China as well
as the Mississippi Valley and Pacific Northwest of the United States.
Loess is generally buff to light yellow or yellowish brown; often contains
shells, bones, and teeth of mammals; and is traversed by networks of small
narrow vertical tubes (frequently lined with calcium carbonate
concretions) left by successive generations of grass roots, which allow
the loess to stand in steep or nearly vertical faces. Loess is now
generally believed to be windblown dust of Pleistocene age. CF:adobe
AGI
Alternate spelling of loeweite.
Loewinson-Lessing classification
A chemical classification of igneous rocks (into the four main
types--acid, intermediate, basic, and ultrabasic) based on silica content.
AGI