Question: Assume that a blast in a sublevel stoping operation puts dust particles in the air. If no ventilation air is moving through the stope,

Assume that a blast in a sublevel stoping operation puts dust particles

Assume that a blast in a sublevel stoping operation puts dust particles in the air. If no ventilation air is moving through the stope, how long will Tt take 5 m particles with a specific gravity of 2.60 g/cmto settle out of the stope air if it is 200 ft (61 m) high? How long would it take for 1 pm particles?

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