![]() The rush of air, at times explosive in force, is caused by the ejection of air from large underground openings, the sudden fall of large masses of rock, the collapse of pillars, slippage along a fault, or a strong current of air pushed outward from the source of an explosion.Īirblasting A method of blasting in which compressed air at very high pressure is piped to a steel shell in a shot hole and discharged.Īir block Air trapped in the upper end of an unvented inner tube of a double-tube core barrel, which, when sufficiently compressed, acts like a solid and stops further advance of core into the inner tube. ![]() A disturbance in underground workings accompanied by a strong rush of air. A term improperly used by some diamond drillers as a syn. Syn: air bubble.Īir belt In a cupola furnace, an annular air space around the furnace, from which air is forced into the furnace.Īirblast a. These bubbles vary in attractive and retaining power for aerophilic grains and are a critical component of the flotation process. CF: water-avid surface.Īir barrage The division of an opening in a mine by an airtight wall into two sides one side is used as an air intake, the other side as a return.Īir bell In froth flotation, the small air pocket inducted or forced into the pulp at depth e.g., bell and the two-walled semistable bubble after emergence from pulp into froth have different characteristics and gas-to-liquid, area-to-volume relationships, hence the distinction. Also called water-repellent surface hydrophobic. A particle (or mineral) of this sort will adhere to an air bubble and float out of a flotation pulp otherwise, the particle will not float. See also: air circulation.Īir-avid surface A surface that seems to prefer contact with air to contact with water. Air piped under compression to work areas and used to operate drilling or mining machinery. Atmospheric air delivered under compression to bottom of drill hole through the drill stem and used in place of water to clear the drill bit of cuttings and to blow them out of the borehole.ĭ. The current of atmospheric air circulating through and ventilating the workings of a mine.Ĭ. It also contains about 0.03% carbon dioxide, some aqueous vapor, argon, and other gases.ī. The mixture of gases that surrounds the Earth and forms its atmosphere composed by volume of 21% oxygen and 78% nitrogen by weight about 23% oxygen and 77% nitrogen. Wolframite pseudomorphous after scheelite.ĪIME American Institute of Mining and Metallurgical Engineers.Īir a. ![]() Syn: acicular bismuth aciculite needle ore acicular bismuth aciculite.ī. An orthorhombic mineral, PbCuBiS (sub 3) sp gr, 6.1 to 6.8 an ore of lead, copper, and bismuth. 2H (sub 2) O forms a series with cobaltomenite rose colored vitreous luster no cleavage conchoidal fracture strongly pleochroic, X rose, Y pale green, Z brown green from Pacajake, Bolivia.Ī-horizon In a soil profile, the uppermost zone from which soluble salts and colloids have been leached and in which organic matter has accumulated. Ahlfeldite A monoclinic mineral, NiSeO (sub 3).
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