line drilling

line drilling

[′līn ‚dril·iŋ]
(mining engineering)
The combined methods of drilling and broaching for the primary cut in quarrying; deep, closely spaced holes are drilled in a straight line by means of a reciprocating drill, and webs between holes are removed by a drill or a flat broaching tool.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

line drilling

In rock excavation by blasting, drilling a series of closely spaced holes, about 4 in. (10 cm) apart, at the perimeter of the cut, so as to break the rock along a line.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
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Quarry and mine drillers now have the advantages of total-site positioning available as standard features in a top-hammer drill rig for line drilling and blastholes up to 5 in.
From top of the line drilling tools, to the clay to day supplies such as grease and vice jaws, RadiusHDD.com has it covered.