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The curve, generally downward, described by a shot deviating from itstruecourse.



Related Terms

SHOT

Method of measuring chain; see shackle.

ADAMANTINE DRILL

A core drill with hardened steel shot pellets that revolve under the rim of the rotating tube; employed in rotary drilling in very hard ground.

AIR BLASTING

A blasting technique in which air at very high pressure is piped to a steel shell in a shot hole and discharged. Also known as air breaking.

AIR SHOT

A shot prepared by loading (charging) so that an air space is left in contact with the explosive for the purpose of lessening its shattering effect.

ANCHOR CHARGE

A procedure that allows several charges to be preloaded in a seismic shot hole; the bottom charges are fired first, and the upper charges are held down by anchors.

BLASTING FUSE

A core of gunpowder in the center of jute, yarn, and so on for igniting an explosive charge in a shot hole. blast lamp See blast burner.

CALYX DRILL

A rotary core drill with hardened steel shot for cutting rock. Also known as shot drill.

CHURN SHOT DRILL

A boring rig with both churn and shot drillings.

DRILL-HOLE PATTERN

The number, position, angle, and depth of the shot holes forming the round in the face of a tunnel or sinking pit.

HEEL OF A SHOT

  1. In blasting, the front or face of a shot farthest from the charge. 2. The distance between the mouth of the drill hole and the corner of the nearest free face. 3. That portion of a drill hole which is filled with the tamping.

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