Generally 500 to 3,000 ft (152 to 915 m) in length. It is used to
transport material between the gathering conveyor and the outside. Haulage
conveyors are commonly classified as either intermediate or main haulage
conveyors. See also:underground mine conveyor
A bend in a haulage road, which may be horizontal, vertical, or both. On
main haulage roads, curves may be 100 ft (30.5 m) in radius or more. With
a good rail track and smooth curves, haulage speeds up to 20 mph (32.2
km/h) can be maintained. A useful rule for determining the minimum radius
of curvature for tramming is R = 12 to 15 x W; for locomotive haulage R =
20 to 25 x W, where W is the maximum wheel base of the rolling stock or
locomotive. Nelson
A large cylinder on to which the steel haulage rope is coiled. The rope is
attached to the drum by passing it inside and looping it about the drum
shaft, and securing the loose end to the rope by rope clamps. The excess
length of rope is coiled around the drum to provide for recapping during
its useful life. Nelson
A worker fully employed on the haulage system in a mine. Nelson
See:electric haulage mine locomotive
A mechanical installation for the tramming of rock, ore, or coal; operated
by ropes, compressed air, or electricity. Weed, 2
a. A rope used for haulage purposes. Zern
b. A wire rope composed of six strands of seven wires each. Lewis
A mine roadway along which a load is moved by a single form of haulage
without coupling or uncoupling of cars and without transfer from one form
of haulage to another. Nelson
The gangway, entry, or tunnel through which loaded or empty mine cars are
hauled by animal or mechanical power. Fay
An excavation method that involves hauling the spoil away from the hole.
Nichols, 1
Method of surface mining in which the overburden is hauled from over the
ore or coal in trucks to a holding area and hauled back after the ore or
coal has been removed. SME, 1
The time it takes the scraper or truck to haul a load to the dumping area
and return to position in the loading area.
The distance measured along the center line or most direct practical route
between the center of the mass of excavation and the center of mass of the
fill as finally placed. It is the distance material is moved.
Nichols, 1
The drawing or conveying of the product of the mine from the working
places to the bottom of the hoisting shaft, or slope. Zern
An engine employed to move tubs on an underground engine plane.
Peel
A road built to carry heavily loaded trucks at a good speed. The grade is
limited on this type of road and usually kept to less than 17% of climb in
direction of load movement.
Coal sold at the pithead. Nelson
a. A mineral, Mn2+ Mn23+ O4 . In
tetragonal octahedrons and twins; also granular massive, particles
strongly coherent. Luster submetallic. Color, brownish-black.
Syn:black manganese
b. A tetragonal mineral, Mn2+ Mn3+2 O4 ;
pseudocubic; in submetallic, commonly twinned crystals in high-temperature
hydrothermal veins, contact metamorphic deposits associated with felsic
igneous rocks; also an alteration product of manganese ores by meteoric
waters; associated with psilomelane in the Batesville district, Arkansas.
An isometric mineral, [(Na,Ca)4-8 Al6 Si6 (O,S) (sub
24) (SO4 ,Cl)1-2D2 ] ; sodalite group; crystallizes in
dodecahedra and octahedra with dodecahedral cleavage; an accessory mineral
in alkaline igneous rocks, esp. extrusives, commonly associated with
nepheline or leucite. Also spelled haueyne, hauynite.
A blue feldspathoid, crystallizing in the cubic system, consisting
essentially of silicate of aluminum and sodium with sodium sulfate,
(Na,Ca)4-8 Al6 Si6 (O,S)24 (SO4 ,Cl)
1-2 . Also spelled haueynite. Also called hauyne. Syn:sapphirine
Dana, 4
A plutonic or hypabyssal rock composed chiefly of hauyne and pyroxene,
usually titanaugite. Small amounts of feldspathoids and sometimes
plagioclase and/or olivine are present. Apatite, sphene, and opaque oxides
occur as accessories. See also:haueynophyre