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What is a significant drawback of raise boring compared to Alimak...

This question belongs to Mining Engineering Mine Development And Mining Methods
Mine Development and Mining Methods
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What is a significant drawback of raise boring compared to Alimak raising?

Answer & Solution
Correct Answer: Option C
Raise boring requires access to both top and bottom of the raise.The correct answer is: Cannot excavate blind raisesAlimak can be used where only bottom access is available.Raise boring is safer and more mechanized.
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