An instrument used to measure strain.
A surveyor's compass with a vernier, used for measuring angles without the
use of the magnetic needle by means of a compensating adjustment made for
magnetic variation. AGI
This series of manometers covers a range of pressures from 0.001-in (25.4
mu m) water gage to 40-in (1.02-m) water gage.
Syn:micrometer-reading manometer
Rolled fragments of brown coal found on the coast of Norway.
Tomkeieff
a. A term used to define a direction that is perpendicular to a
horizontal, or level, plane. AGI
b. Local usage for vertical fractures, esp. in the Black Hills, South
Dakota. AGI
c. Said of deposits and coal seams with a dip of from 60 degrees to 90
degrees . Stoces
d. In aerial photographic mapping, a vertical line through the exposure
station or rear nodal point. Seelye, 2
e. Orientation of a plumb-bob on a string under the force of gravity.
Seelye, 2
A photograph taken from an aircraft for purposes of aerial mapping or
aerial geophysical prospecting; special cameras and techniques are
employed. See also:profile flying
Angle of elevation or depression, measured from the true horizontal plane.
Seelye, 2
A mobile-type rotary drill used on opencast sites with no hard rock for
drilling vertical blasting holes. It can drill a hole of 5 in or 6 in
(12.7 cm or 15.2 cm) in diameter to depths of about 30 ft (9.1 m).
Drilling is by means of a rotary cutting head with interchangeable cutting
bits, the auger removing the cuttings from the hole. An overall speed of
30 ft/h (9.1 m/h) can be obtained. See also:horizontal auger
Nelson
An instrument for measuring variations in the vertical component of the
terrestrial magnetic field, usually by balancing the torque on a magnet
system by means of a counter gravitational torque acting on
counterweights. AGI
Opposed-shelf type that has two or more vertical elevating conveying units
opposed to each other. Each unit consists of one or more endless chains
whose adjacent facing runs operate in parallel paths. Thus, each pair of
opposing shelves or brackets receive objects (usually dish trays) and
deliver them to any number of elevations.
a. Graduated circle on theodolite or tacheometer, by use of which the
slope of the collimation line through sighting telescope is measured in
survey work. Pryor, 3
b. Any great circle of the celestial sphere passing through the zenith.
AGI
An instrument in which the telescope sights vertically (upward or
downward); used chiefly for centering a theodolite on a tower exactly over
a station mark on the ground. It may be used for any vertical sight.
Seelye, 2
That part, or component, of a vector that is perpendicular to a horizontal
or level plane. AGI
a. A blasting method employed in underground sublevel mining. Initially a
vertical slot extending across the width of the stope is mined. The
remaining portion of the stope is then blasted by section into the
vertical slot following sublevel procedures. SME, 1
b. A variation of the sublevel stoping method that uses basic crater
blasting models. Blasting is carried out at the base of vertical
boreholes, making horizontal cuts and advancing upwards. A spherical
charge is placed at an optimal distance from the stope back so that a
maximum volume of rock is broken in the shape of an inverted cone.
Borehole spacing is determined so that overlapping fragmentation cones do
not disturb adjacent explosive charges. Abbrev. VCR.
vertical crater retreat mining
A patented mining method in which large, parallel, vertical drillholes
permit placement of nearly spherical explosive charges, such that
horizontal slices of ore are then broken into an undercut; applicable to
ore of only moderate strength. SME, 1
a. The curve between two lengths of a straight roadway that possess
different gradients. The curve provides a gradual change for haulages from
one inclination to the other. The curve leading to the top or brow of an
inclined plane would be convex and at the bottom would be concave.
Nelson
b. The graduated curve connecting two lengths of a railway or road, which
are at different slopes. Hammond
c. The meeting of different gradients in a road or pipe.
Nichols, 1
See:shear cut
See:vertical slip
Usually column of sand used to vent water squeezed out of humus by weight
of fill. Nichols, 1
a. A deliberate increase in the vertical scale of a relief model, plastic
relief map, block diagram, or cross section, while retaining the
horizontal scale, to make the model, map, diagram, or section more clearly
perceptible. AGI
b. The ratio expressing vertical exaggeration; e.g., if the horizontal
scale is 1 in to 1 mi and the vertical scale is 1 in to 2,000 ft, the
vertical exaggeration is 2.64. Abbrev: VE AGI
c. The apparent increase in the relief as seen in a stereoscopic image.
AGI
vertical excavation limited area
This method of excavation is used in loose or wet soils--unconsolidated
formations--where the banks must be supported by shoring or sheathing. The
material must, out of necessity, be lifted out vertically.
Carson, 1