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tin open pit mining method

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tin open pit mining method

They areminedby one of several surface-mining methods,principally gravel pumping, dredging, and, to a smaller extent,open-pit mining.A large proportion oftinore isminedby gravel pumping. In thismethod, the barren overburden is removed, often by draglines or shovels, and high-pressure water jets are used to break up and dislodge the tin-bearing sand.

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