11. What is rat-hole mining?
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11. What is rat-hole mining?
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Answer:
Rat-hole mining is a primitive and hazardous method of mining for coal, with tunnels that are only 3-4 feet in diameter (hence, rat-hole), leading to pits ranging from 5-100 sq. mt deep.
Explanation:
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Answer:
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Explanation:
RAT HOLE is aprimitive and hazardous method of
mining for coal with tunnels that are only 3-4 feet in diameter (hense rat hole) leading
to pits ranging from 5-100 sq.mt deep