Person who operates brakes, or levers, at the top of an inclined plane. A
brakeman. Fay
a. Separating fine powder from coarser material by forming a suspension of
the fine material in a liquid. ASM, 1
b. A means of classifying a material as to particle size by the rate of
settling from a suspension. CF:trituration
In the mineral process of froth flotation, raising of acrophilic particles
to the surface of a pulp, by so activating them that they cling to the
air-water interface of a rising or coursing air bubble. Pryor, 3
A trigonal mineral, (Ca,Na2 ,K2 )3 Al6 Si (sub
12) O36 .18H2 O ; zeolite group; in cavities in basalts with
other zeolites. Also spelled levynite; levyine; levyite.
A series of two or more holes drilled as closely together as possible,
then connected by knocking out the thin partition between them, forming
thus one wide hole, having its greatest diameter in a plane with the
desired rift. Blasts from such holes are wedgelike in their action, and by
means of them larger and better-shaped blocks can be taken out than would
otherwise be possible. Fay
ˆ6 „-H +0H Z; 6 DICTIONARY TERMS:Leyner-Ingersoll drill See:water leyner
[\B]Leyner-Ingersoll drill[\N]
A peridotite containing both clinopyroxene and orthopyroxene in addition
to olivine.
Freeing by comminution, or crushing and grinding, of particles of a
specific mineral from their interlock with other constituents of the coal
or ore. Also called severance. Syn:unlocking
liberation of intergrown constituents
Crushing of intergrown material to free the constituent materials.
BS, 5
In electrolytic refining of metals, tanks in which the electrolytic
solution is reconstituted. Pryor, 3
Gelatinous permissible explosive; used in mining. Bennett
An orthorhombic mineral, Cu2 (PO4 )(OH) ; olive-green; forms
small crystals and druses in copper deposits.
A selective agglomeration process under development, in which the liquid
carbon dioxide-water interface is used for the differentiation and
separation between coal and mineral matter. The resultant clean coal is a
low-sulfur and low-ash content product of relatively low moisture content.
Source material, special nuclear material, or byproduct material received,
possessed, used, or transferred under a general or special license issued
by the Nuclear Regulatory Commission. Lyman
A place or building licensed by the local authority for the storage of
explosives. See also:magazine; registered premises. BS, 12
a. A short, flattish piece of wood or steel plate wedged over a post,
timber set, or steel arch. A lid is used to tighten the support against
the ground and also to increase the area supported. See also:clog;
wedge. Nelson
b. A cap piece used in timbering. CF:lag
In the coke-products industry, a laborer who lifts lids of charging holes
of ovens and chips carbon from edges of holes, using bars with
hook-and-chisel ends. Syn:charger
Scot. In mine haulage, a command to stop. Fay
a. Scot. The line, direction, or bearing; as of a vein, lode, or fault.
Fay
b. Pass-by; shunt; a storage or bypass arrangement in haulage track. Also
spelled lye. Mason
c. To become quiet or inactive; said of a mine that is idle. Fay
An orthorhombic mineral, Ca2 (UO2 )(CO3 )3
.11H2 O ; olive-green; forms soft, scaly, or granular crystalline
aggregates with one cleavage. Syn:uranothallite
Right to legal claim on goods or property. Pryor, 1