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Which of the following is a disadvantage of longwall mining

This question belongs to Mining Engineering Mine Development And Mining Methods
Mine Development and Mining Methods
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Which of the following is a disadvantage of longwall mining?

Answer & Solution
Correct Answer: Option C
Longwall mining is highly productive, especially for coal.The correct answer is: High initial capital costRequires expensive machinery and roof support systems.However, it offers good safety and recovery rates.
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