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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
shaft station
Mining; General mining
An enlargement of a level near a shaft from which ore, coal, or rock may be hoisted and supplies unloaded.
face entry
Mining; General mining
An entry driven at right angles to the face cleat and parallel to the butt cleat.
dip entry
Mining; General mining
An entry driven downhill so that water will stand at the face. If it is driven directly down a steep dip it becomes a slope.
cutoff entry
Mining; General mining
An entry driven to intersect another and furnish a more convenient outlet for the coal. Compare: cutoff
active entry
Mining; General mining
An entry in which coal is being mined from a portion thereof or from connected sections.
slab entry
Mining; General mining
An entry widened or slabbed to provide a working place for a second miner.
clinozoisite
Mining; General mining
An epidote having the composition of zoisite, Ca 2 Al 3 (SiO 4 ) 3 (OH) ; monoclinic; crystals striated.
