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What is the primary function of a portal in mining

This question belongs to Mining Engineering Mine Development And Mining Methods
Mine Development and Mining Methods
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What is the primary function of a portal in mining?

Answer & Solution
Correct Answer: Option C
Portal is the entrance to an adit or tunnel.The correct answer is: Surface entry to an aditIt connects the surface to underground workings in horizontal or inclined entries.It must be stable and often reinforced.
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