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17 June, 06:09

How are placer mining, hydraulic mining, and hard-rock mining different?

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  1. 17 June, 07:23
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    These are different because the way the rock is worked differs, as well as the type of rock.
  2. 17 June, 07:59
    0
    placer mining, hydraulic mining method od mining that uses water under high pressure to blast away gravel and dirt to expose the minerals underneath.
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