Question: Given the following: Drillhole size: 6 . 7 5 - inch Explosives Density: 1 . 2 1 g / cc Bench Height: 4 0 -

Given the following:
Drillhole size:
6.75-inch
Explosives Density: 1.21 g/cc
Bench Height:
40-feet
Stemming Height: 14-feet
Sub-Drill: 5-feet
Burden:17-feet
Spacing:17-feet
Rock Density:
170-pounds/foot^3
Determine:
a. Pounds of explosive in the blasthole to the nearest pound
b.Powder factor in pounds/ton to two decimal places

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