The most suitable fastening between a wire rope and its socket is a white
metal capping. Haulage ropes are generally doubled back on themselves
around a steel thimble and secured with bulldog clips. Hammond
Steel rope suspended in a vertical shaft to prevent excessive swinging of
the cages or skips. Eight rope guides are generally used for the shaft,
four for each cage, and two additional rubbing ropes are installed to
prevent possible collision between the cages or skips. The ropes are
suspended from girders fixed on the safety hook catch-plate platform and
kept taut in the shaft by means of weights in the shaft bottom sump. The
clearances between the cages, and also between the cage corners and the
shaft wall, should be about 12 in (30.5 cm). See also:fixed guides
Nelson
a. Means of moving loaded and empty mine cars by use of wire rope;
generally used on steep inclines where use of electric mine locomotives is
inefficient. BCI
b. Any transportation system employing a steel wire rope to haul the mine
cars or trams. See also:direct-rope haulage; main-and-tail haulage;
tail-rope haulage. Nelson
Systems of rope haulage may be classified as (1) self-acting or gravity
planes; (2) engine planes; (3) tail-rope haulage; (4) endless-rope
haulage; and (5) aerial tramways, which are frequently considered by
themselves, since they are not applied to transporting material
underground. Lewis
That length of rope in which one strand makes one complete revolution
about the core.
The sudden jerking or twitching of a haulage rope due to the rope laps
slipping to a smaller diameter on the drum. A severe plucking of a rope
may be felt faintly more than 800 yd (725 m) distance from the engine.
See also:overhaul
An employee whose duty it is to see that cars are coupled properly, and to
inspect ropes, chains, links, and all coupling equipment. A trip rider.
See also:brakeman
A steel wire rope, with wedge heads fixed to its ends, used instead of the
normal steel rod in roof bolting. Also known as cable bolting. The rope
has a diameter of about 7/8 in (2.2 cm) and a length from 15 to 20 ft (4.5
to 6 m). Nelson
A drop forged-steel device, with a tapered hole, which can be fastened to
the end of a wire cable or rope and to which a load may be attached. It
may be either the open- or closed-end type. Long
a. A line or double line of suspended ropes, usually wire, along which
articles of moderate weight may be transported on slings, either by
gravity or power; much used in mining districts for transportation to
watercourses or to railway lines. An aerial tramway. Standard, 2
b. See:aerial ropeway
A long reverberatory furnace with a series of plows or rakes that are
drawn over the hearth by a continuous cable, moving the ore steadily from
the feed to the discharge end. Fay
A tetragonal mineral, CuInS2 ; chalcopyrite group; at Charrier,
Allier, France.
a. A monoclinic mineral, 4[(Cu,Zn)2 (CO3 )(OH)2 ] ;
forms green to blue spherules in oxidized zones of zinc-copper-lead
deposits.
b. The mineral group glaukosphaerite, kolwezite, mcguinnessite,
nullaginite, rosasite, and zincrosasite.
A combustible-gas drainage method utilizing controlled drainage from the
coal seams as they are being mined. This method, which is also known as
the pack cavity method, was devised to extract gas from the mined-out
areas of advancing longwall mining systems by leaving corridors or
cavities at regular intervals in the pack. Virginia Polytechnic
A monoclinic and triclinic mineral, Ca(Fe,Mn)2 Be3 (PO (sub
4) )3 (OH)3 .2H2 O .
A monoclinic mineral, K(V,Al,Mg)2 (AlSi3 )O10 (OH)
2 ; mica group; soft; a source of vanadium.
The morganite variety of beryl.
A hardened steel or alloy noncore bit with a serrated face to cut or mill
out bits, casing, or other metal objects lost in the hole. Also used to
mill off the rose-bit dropper on a Hall-Rowe wedge. Also called mill;
milling bit. CF:junk mill
See:rosette copper
A circular diagram for plotting strikes (with or without dips) of planar
features, such as joints, faults, and dikes; so named because clusters of
preferred orientations resemble the petals of a rose. AGI
a. A monoclinic mineral, Ca2 (Co,Mg)(AsO4 )2 .2H (sub
2) O ; roselite group; forms a series with wendwilsonite; dimorphous with
roselite-beta; perfect cleavage.
b. The mineral group brandtite, roselite, wendwilsonite, and zincrosasite.