open-pit mining

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open-pit mining

[¦ō·pən ¦pit ′mīn·iŋ]
(mining engineering)
Extracting metal ores and minerals that lie near the surface by removing the overlying material and breaking and loading the ore. Also known as open-cast mining; opencut mining.
References in periodicals archive ?
The submissions spanned dry hire as well as full contract mining methods, in addition to standalone drill and blast pricing packages based on material volumes produced from the open pit mine designs developed for the Pre-Feasibility Study ("PFS") concluded this March.
23) The operation of an open pit mine requires large amounts of water in the mineral leaching process, which poses risks of water depletion and water contamination.
A Memorandum of Understanding has now been signed which outlines the proposal to expand the main ATA open pit mine into the TCM concession.
The company employs more than 800 at the open pit mine in Boron in Kern County, and is one of the world's leading supplier of borate ore, a salt found in detergent, water softeners and other products.
a San Francisco engineering firm, identified some significant technical issues around the operation an open pit mine in this remote area.
The principal factors which have precluded development of the Cinola deposit to date are environmental concerns about potential acid rock drainage which might be produced by a large scale, open pit mine and low metallurgical recoveries from low grade gold ore.
This includes the copper-molybdenum open pit mine partially mined by Equatorial Mining Limited (Equatorial) in the early 2000's and the adjacent primary molybdenum open pit deposit last mined in 1991 by Cyprus Minerals Corporation (Cyprus).
Borax is gearing up to make the largest open pit mine in California even larger.
has been named the nation's safest open pit mine for 1993 by the U.
A window at the rear of the theater looks out on the 650-foot deep, 1-mile long, half-mile wide open pit mine.
Dempsey also disclosed that Cortez hopes to develop a new open pit mine, called the Crescent Pit, on South Pipeline ground.