a. To open a mine and ore; more or less, to search, prospect, explore.
von Bernewitz
b. To traverse a mineralized body horizontally by drives and vertically by
shafts or winzes to prove its extent. CTD
c. To open up orebodies by shaft sinking, tunneling, or drifting.
Ballard
Ore that has been exposed on three sides and for which tonnage and quality
estimates have been made; ore essentially ready for mining.
CF:proved reserve
assured mineral. AGI
a. The preparation of a mining property or area so that an orebody can be
analyzed and its tonnage and quality estimated. Development is an
intermediate stage between exploration and mining. AGI
b. To open up a coal seam or orebody as by sinking shafts and driving
drifts, as well as installing the requisite equipment. Nelson
c. Work of driving openings to and in a proved orebody to prepare it for
mining and transporting the ore. Lewis
d. The amount of ore in a mine developed or exposed on at least three
sides. CTD
e. S. Afr. The work done in a mine to open up the paying ground or roof
and, in particular, to form drives or haulages around blocks of ore, which
are then included under developed ore reserves. Beerman
f. A geologic term, applied to those progressive changes in fossil genera
and species that have followed one another during the deposition of the
strata of the Earth.
g. In construction of a water well, the removal of fine-grained material
adjacent to a drill hole, enabling water to enter the hole more freely.
AGI
h. Exploitation of ground water. AGI
a. A main tunnel driven from the surface, or from a point underground, to
gain access to coal or ore for exploitation purposes. Nelson
b. Slant.
Delineation of the size, mineral content, and disposition of an orebody by
drilling boreholes. Long
The shafts, tunnels, laterals, crosscuts, and staple pits to prove and
render accessible the coal or ore to be extracted.
See also:productive development; unproductive development.
Nelson
In bituminous coal mining, one who operates a hoist to raise and lower
workers, rock, and supplies during development work (sinking shafts and
driving horizontal underground passages prior to the actual mining of coal
from a seam). DOT
See:miner
A plan showing the proposed development of the mine workings, and kept for
operational purposes. BS, 7
S. Afr. The rock broken during development work in payable ground, which
contains both valuable and barren rock and is, therefore, included in the
tonnage sent to the reduction plant of a mine. Beerman
Sampling for the establishment of reserves and conducted primarily upon
the exposures along the development drivages. See also:reserve
Nelson
Work undertaken to open up orebodies as distinguished from the work of
actual ore extraction. Sometimes development work is distinguished from
exploratory work on the one hand and from stope preparation on the other.
AGI
An upthrust propeller, stirring pulp vigorously in a cylindrical tank, used
in leach agitation of minerals. Pryor, 1
To change the course of a borehole. CF:walk; wander. Long
Syn. for deflecting. Long
a. The departure of a drilled hole from being straight. The hole may be
either vertical or inclined, and the departure may be in any direction.
Deviation may be intentional, as in directional drilling, or undesirable.
Syn:deflection
b. In more general use, the angle of departure of a well bore from the
vertical, without reference to direction. AGI
c. The distance, measured in a horizontal plane, between two surveyed
points in a borehole or between the collar and any point below the collar
in a borehole. Also called dislocation; throw. Long
A monoclinic mineral, CaCu4 (SO4 )2 (OH)6 .3H
2 O ; emerald-green to verdigris-green. Formerly called devillite;
herrengrundite; lyellite; urvolgyite.
See:devilline
Cubes of fully or partially oxidized and hydrated pseudomorphs of pyrite
in alluvial workings.
A hard, gray-white siliceous rock. Arkell