Difference between surface mining and underground mining

1.	Difference between surface mining and underground mining
Answer» Answer: SURFACE mining is suitable for large, low-grade ore deposits which OCCUR below a thin layer of ROCK or sand. Underground mining is used for small, high-grade deposits COVERED with a thick soil or rock above the ore. Alluvial mining is suitable for deposits in sand and riverbeds.

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Answer:

SURFACE mining is suitable for large, low-grade ore deposits which OCCUR below a thin layer of ROCK or sand. Underground mining is used for small, high-grade deposits COVERED with a thick soil or rock above the ore. Alluvial mining is suitable for deposits in sand and riverbeds.

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Difference between surface mining and underground mining

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