Question: If mining in Problem 12 is by conventional overhand stopping, and round length (measured on the dip) is 15 ft (4.57 m), is failure likely

If mining in Problem 12 is by conventional overhand stopping, and round length (measured on the dip) is 15 ft (4.57 m), is failure likely to be stable or not as mining proceeds past the maximum extraction ratio previously calculated? Explain your answer.

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