waste rock

waste rock

[′wāst ‚räk]
(mining engineering)
Valueless rock that must be fractured and removed in order to gain access to or upgrade ore. Also known as muck; mullock.
References in periodicals archive ?
Region 6 spokesman Dave Bary reported the remedy selected for the site includes excavation of contaminated soil and waste rocks, interception of water draining from waste rock piles at the mine site, underground mine dewatering and water treatment, covering contaminated material at the tailings facility, and treating groundwater at the tailings facility.
Once past this phase of waste rock removal at Wolverine, we'll see coal production increase and we are confident that we will meet our production and cost goals for the year.'
Fort Knox's owner, Toronto based Kinross Gold, announced plans this spring to spend $60 million on a three-year mine expansion project, which entails removing 55 million tons of non-gold bearing rock, or waste rock, in order to access an estimated 1 million ounces of gold.
In the case of the Lindsley Mine, Weisman explains that certain acid-generating waste rock is being stored in specially designed containment areas.
FLSmidth recently announced it will join with Goldcorp to develop EcoTails, a new system the company said is intended to dramatically improve tailings and waste rock disposal while economically processing mine waste and increasing water recovery and reuse by as much as 95%.
Furthermore, the grant would also contribute to the relocation of additional volumes of radioactive waste rock discovered during the original project implementation, as well as the continued relocation of radioactive tailings.
Waste rock will be removed from the material destined for the mill circuit before it leaves the open pit, allowing the company to double the amount of copper and nickel being processed by the mill.
The first model in the G-Series, the 4-32 F doubles as a material processor, screening out waste rock in mining cells as it loads ore onto transport dump trucks.
The company will invest $5.5 million this year, mainly for drilling at the Arctic high-grade copper project during the summer field season, as well as for completion of in-pit geotechnical, hydrological, metallurgical, environmental, and waste rock characterization studies.

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