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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
wave velocity
Mining; General mining
A quantity that specifies the speed with which a wave travels through a medium.
bulled hole
Mining; General mining
A quarry blasting hole, the bottom of which has been enlarged or chambered to receive a heavy explosive charge.
hillside quarry
Mining; General mining
A quarry cut into and along the hillside; may comprise a single face or a series of benches. If the depth of face is not more than about 30 ft (9 m) it can be worked in one cut, but deeper faces are ...
boulder quarry
Mining; General mining
A quarry in which the joints are numerous and irregular, so that the stone has been broken naturally into comparatively small blocks. A local term applied to certain marble quarries in the region of ...
openpit quarry
Mining; General mining
A quarry in which the opening is the full size of the excavation. One open to daylight.
undercut quarry
Mining; General mining
A quarry in which the walls slant outward (overhang the working face) so as to make the floorspace wider with increasing depth.
oblique block
Mining; General mining
A quarry term applied to a block of stone bounded by 3 pairs of parallel faces--4 of the 12 interfacial angles being right angles, 4 obtuse, and 4 acute.
