Question: a mine, the bench for blasting is 1 2 5 m long, 7 9 m wide, and 2 5 m high. KB = 2 8

a mine, the bench for blasting is 125 m long, 79 m wide, and 25 m high. KB =28 and KS =1.2. The hole diameter is 150 mm. What is the Burden in meters?

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