a. See:take
b. Also Syn:mining claim
May 10, 1872; 17 Stat. 91) See also:undercut
See:anchor bolt
Support rope for suspension of a grab used for excavating or handling bulk
material. Hammond
Derb. An exclamation by the banksperson down a shaft to the bottomer, when
workers are about to descend the shaft, to let them know that they are not
to send up a load of coal, but merely the empty rope or chain. Fay
a. In Joplin, Missouri, a local term for a mine shaft. Fay
b. A drill hole, borehole, or well. See also:borehole
c. To undercut a seam of coal by hand or machine. Fay
d. To make a communication from one part of a mine to another. Fay
e. To pick out the soft clay beneath a lode or seam of coal preparatory to
wedging or blasting the mass out. Gordon
f. A perforation through the laminae. Skow
The amount, expressed in degrees, that a borehole has diverged from its
intended course in a distance of 100 ft (30 m). Syn:hole deviation
Long
See:hole curvature
To start drilling a borehole. Also called collar; spud; spud-in.
Long
In quarrying, an arrangement consisting of a combination of vertical and
horizontal holes. Streefkerk
Pennsylvania. Person who loads holes with explosives; a charger.
Fay
The workers employed in the operation of holing the coal. Peel
A system of contract work underground by which the pointing of the holes
and blasting are done by company personnel and the rest of the work by the
miners. Fay
Successful meeting of two approaching tunnel heads, or of winze and raise.
Pryor, 3
a. Cutting. Mason
b. The working of a lower part of a bed of coal for bringing down the
upper mass. Fay
c. The final act of connecting two workings underground.
See also:holing-through
d. The meeting of two roadways driven expressly to intersect each other.
Syn:thirling
e. Eng. Shale partings in which the first charges were inserted for
blasting, Wenlock limestone, Dudley. Arkell
f. See:undercutting
g. Eng. See:kirving
Eng. The operation of establishing an air current between the downcast and
upcast shafts. Fay
A kerf wedge. Nelson
A pick used in holing coal. Standard, 2
Eng. Holing dirt or small coal made by kirving with a coal-cutting
machine. Also called scuffings. Syn:cuttings
S. Staff. A short-handled, round-bladed shovel. Fay
Driving a passage through to make connection with another part of the same
workings, or with those in an adjacent mine. See also:holing
Fay
A coal pillar design formula that predicts the strength of coal pillars
based on laboratory tests of coal cube strength combined with pillar
height and width specifications. The Holland-Gaddy formula is generally
considered to be overly conservative for large pillar width-to-height
ratios (over 5). SME, 1