20 Terms
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Mineral mining
The extraction of valuable minerals or other geological materials from the earth for economic interests.
Industry: Mining
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Mineral mining
Slabbing cut
Mining; General mining
A drill hole pattern suitable for a wide rectangular tunnel; e.g, 8 ft by 15 ft (2.4 m by 4.6 m) wide. The entire face is fired in three separate rounds of shots, the first or cut holes providing a ...
Swing cut
Mining; General mining
A drill hole pattern suitable for a wide rectangular tunnel; e.g, 8 ft by 15 ft (2.4 m by 4.6 m) wide. The entire face is fired in three separate rounds of shots, the first or cut holes providing a ...
Twist drill
Mining; General mining
A drill made by twisting a length of steel of rectangular or oval section into a spiral form, hence the term twist drill. Many hand-operated coal drills are of this type, and the rotation of the ...
Misfire hole
Mining; General mining
A drill hole charged with explosives, in which all or part of the explosive has failed to detonate.
Drill rig
Mining; General mining
A drill machine complete with all tools and accessory equipment needed to drill boreholes.
Dry hole
Mining; General mining
A drill hole in which no water is used for drilling, as a hole driven upward.
