Underground mining process is done when the mineral stone, or precious metals found in very long distances to be at a depth of soil. Underground mining techniques used to excavate hard minerals, mainly those containing metals such as ore containing gold, silver, iron, copper, zinc, nickel, tin and lead, but also involves using the same techniques for excavating ores of gems such as diamonds. And The processing of underground gold mines is used where the depth of mineral ore below the surface makes open-cut mining uneconomic
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