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 400 short-ton payload, ultra-class trucks, will be utilized to move higher quantities of material more efficiently at the Ray open pit mine as older, smaller capacity haulage equipment is gradually phased out of operation.
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.
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).
and a neighboring open pit mine where the water may have emanated, said Fay Apil, Cordillera director of the Mines and Geosciences Bureau on Monday.
Borax is gearing up to make the largest open pit mine in California even larger.
A window at the rear of the theater looks out on the 650-foot deep, 1-mile long, half-mile wide open pit mine.
David Russell, CEO and President of Apollo, said, "Since the open pit mine problems encountered at Montana Tunnels last year which led to the closure of the pit in October 2005, we have been milling low grade ore stockpiles to produce lead-gold and zinc-gold concentrates.