MINING GLOSSARY
A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
D
Deep Mining - The exploitation of coal or mineral deposits at depths exceeding about 3,000 feet. Also known as underground mining.
Dragline - A type of excavating equipment which casts a rope-hung bucket a considerable distance, collects the dug material by pulling the bucket toward itself on the ground with a second rope, elevates the bucket, and dumps the material on a spoil bank, in a hopper, or on a pile.
Dredging - The removal of soils from under water, using the water as a means of transportation to convey the soils to final positions.
Drift - A horizontal underground passage. A drift follows the vein rather than intersect it like a crosscut.
Drill - Any cutting tool or form of apparatus using energy in any one of several forms to produce a circular hole in rock, metal, wood, or other material.
Duckbill - The name given to a shaking-type combination loading and conveying device, so named from the shape of its loading end and which generally receives its motion from the shaking conveyor to which it is attached.