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open pit quarry mines machinery

open pit quarry mines machinery

Open-pit mining, also known asopencast mining, is a surfacemining techniquethat extracts minerals from anopen pitin the ground.Open-pit miningis the most common method used throughout the world formineral miningand does not require extractive methods or tunnels. This surfaceminingtechnique is used when mineral or ore deposits are found relatively close to the surface of the earth.

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