a. To cut across or meet, as a borehole cuts through a stratum of rock or
encounters a vein. Long
b. In mining, to cut across or meet a vein or lode with a passageway;
also, the point at which a vein or lode cuts across an earlier formation.
Long
a. The point at which a deliberate deflection of the trend of a borehole
is made. Long
b. The point at which a drill hole enters a specific orebody, fault, or
rock material. Long
c. Meeting of two orebodies or veins, or the point at which a vein or
orebody meets a fault, dike, or rock stratum. Long
d. The point at which two underground workings connect. Long
e. A method in surveying by which the horizontal position of an unoccupied
point is determined by drawing lines to that point from two or more points
of known position. Syn:resection
The angle of deflection, as measured at the intersection point, between
the straights of a railway or highway curve. CTD
That point at which two straights or tangents to a railway or road curve
would meet if produced. See also:tangent distance
An ore shoot located at the intersection of one vein or vein system with
another. It is a common type of ore deposit. AGI
Said of the texture of a porphyritic igneous rock in which the groundmass,
composed of a glassy or partly crystalline material other than augite,
occupies the interstices between unoriented feldspar laths, the groundmass
forming a relatively small proportion of the rock. CF:hyalophitic;
hyalocrystalline. AGI
Small-size (1/8 inch or 3 mm and larger), irregular-shaped fragments of
tungsten carbide slugs mixed with a suitable matrix metal; applied to
cutting faces of bits or other cutting tools as a weldment. Also called
clustered carbide. Long
a. An opening or space, as in a rock or soil. Syn:void; pore. Adj.
interstitial. AGI
b. Small void in the body of a metal. ASM, 1
Said of a mineral deposit in which the minerals fill the pores of the host
rock. CF:Frenkel defect; impregnated. AGI
Subsurface water in the voids of a rock. Syn:pore water
CF:connate water
The state or condition of occurring between strata of a different
character. AGI
a. Interbedded; strata deposited between or alternatingly with other
strata. Fay
b. Of coal and mineral matter, associated in random horizontal layers,
usually with a natural cleavage. BS, 5
See:interfluve
Lying between beds of trap. Standard, 2
a. The distance between two points or depths in a borehole; core
intersection.
b. The vertical distance between strata or units of reference. AGI
c. The contour interval is the vertical distance between two successive
contour lines on a topographic, structural, or other contour map.
Syn:contour interval
A construction of conveyor belt similar to the solid woven type of belt
and having the plies interwoven to the extent that it is impossible to
separate them.
The conventional system of mining in which the development headings are
driven in the coal seam. CF:horizon mining
See also:unproductive development
Newc. The upstroke of a pump engine. Fay
Said of a shot that goes into the coal beyond the point to which the coal
can be broken by the blast. Fay
Within or across the crystals or grains of a metal. Syn:transgranular
ASM, 1
The interior curve of an arch, as of a tunnel lining. Sandstrom