Question $1(25$ pt$)$:

A hard rock quarry has rock density of $2\mathrm{.}7\frac{g}{c}{m}^3.$ Design blasting pattern using slurry explosive

having specific density of $0\mathrm{.}81\frac{g}{c}{m}^3.$ Assume the drill hole diameter of $200mm$ and $K_B=25$ and

$K_S=1\mathrm{.}3.$

Calculate the following parameters for designing the blasting pattern.

a$)$ Burden

b$)$ Spacing

c$)$ Total number of holes if the bench is $15m$ high, $130m$ long and $50m$ wide

d$)$ Total amount of explosive charge required per meter of hole.

e$)$ Powder Factor $($both mass and volume$)$