Line drilling | Article about line drilling by The Free Dictionary
line drilling[′līn ‚dril·iŋ]
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.
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.
References in periodicals archive
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.
Fully equipped shop with air lines & pneumatic tools, 220V/3-phase electric, permitted spray booth, Brandt edgebander, double line drilling
machine, Kaeser air compressor.
From top of the line drilling
tools, to the clay to day supplies such as grease and vice jaws, RadiusHDD.