second mining

second mining

[′sek·ənd ′mīn·iŋ]
(mining engineering)
In underground coal mining, a procedure in which the pillars left for roof support are removed as mining operations move back out of the previously mined area.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
References in periodicals archive ?
This is Vulcan's second mining operation in the Azusa area.
Vulcan: will mine Azusa
The company has started its second mining campaign at LGP.
Crescent starts mining and trucking operations at LGP
Investors from Lecanto, Florida are expected to operate the second mining company that will invest US15ドル million to produce bauxite.
CEMENT PLANT FOR THE SOUTHWEST
The new entity, BHP Billiton, which will be quoted on the London and Australian stock exchanges, will be worth some USD28 billion, making it the world's second mining industry behind the American Alcoa group.
MINES: BHP/BILLITON MERGER EFFECTIVE SINCE JUNE 29

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