open-pit mining

(redirected from Open pit)

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.
Butte, Montana, is home to the Berkeley Pit, a former open pit mining site that has slowly filled with deadly and acidic water that threatens to contaminate the drinking water of nearby communities within the next ten years.
Perth, Australia, Oct 6, 2010 - (ABN Newswire) - Gold producer Focus Minerals (ASX:FML) is pleased to advise that drilling to establish a sustainable production base for upcoming open pit mining at its Coolgardie Gold Operations in Western Australia has delivered a series of outstanding high-grade gold intersections from the Happy Jack deposit, adjacent to its flagship Tindals Mining Centre.
Atna") -- (TSX: ATN) is pleased to announce that it has completed NI 43-101 compliant Technical Reports ("Technical Reports") for the estimation of open pit and underground reserves and resources at the Briggs Mine in Inyo County, California.
Ten per cent of the milled tonnage comes from Hoyle Pond, five per cent from the Dome underground, and the remainder comes from the Pamour open pit and the stockpile at the Dome open pit.
Borax is gearing up to make the largest open pit mine in California even larger.
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).
A combination of the open pit and underground mining would recover approximately 140,000 ounces of gold over a four and a half year life assuming that underground production commences nine months after the start of open pit mining.
where president and CEO Phillip Walford is eyeing the possibility of a future open pit PGM-copper mine.
A window at the rear of the theater looks out on the 650-foot deep, 1-mile long, half-mile wide open pit mine.
According to the economic studies conducted by BHM and Liberty management, the McWatters deposit is expected to generate total undiscounted cash flow of approximately CAD$63,000,000, with the open pit attributing approximately CAD$19,000,000 of the total cash flow.
Onge, PJV open pit superintendent, says the Dome pit will finish in October 2005.