Q26
In an overburden bench of an iron ore mine the following data were found: Height = 10m Burden = 4m Spacing = 3m Sub-grade drilling length = 1m Collar stemming length = 3m If the diameter of the explosive column is 150 mm and the specific gravity of explosive and that of rock are 0.9 and 2.4 respectively, the powder factor in te/kg will be
A.
3.29
B.
4.98
C.
2.26
AnswerD.
4.53
Answer: Option C
Solution
Answer: Option C
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