air-track drill

air-track drill

[′er ¦trak ‚dril]
(mining engineering)
A heavy drilling machine for quarry or opencast blasting, equipped with caterpillar tracks and operated by independent air motors.
References in periodicals archive ?
A total of 4,946 feet was drilled with an air-track drill in 63 shallow holes.
Readers are cautioned that an air-track drill is used solely as a reconnaissance tool since the hole is unlined which may result in some contamination of samples.
The Company will be using an Air-track drill rig to drill a close spaced grid of shallow holes to test four target zones on this 1,200 acre property.
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