Calculate the live storage capacity (feed) of a surface stockpile in tons. What percentage of the total volume of the pile does the live feed represent.
Given:
• Feed to a surface storage pile is from the top at the centre
• The diameter of the pile is 64 feet
• Discharge from the pile is at the bottom below the centre through a 4.0 foot hole
• The SG of the ore is 4.86
• Swell is 40%
• Angle of repose = 37 degrees
• Angle of discharge = 46 degrees