$A^{*}$ reinforcement $*$ design $*$ will $*$ be

done' in$\text{'}$ a mine' gallery with a $*$

width $-$ in $5m*$ and length in $3m.$

Thickness of coal is $\text{'}s=2m,$ the

distance among $\text{'}$ rock bolt sets: $1m,$

the distance between sets: $1$m$,$

immediate roof thickness: $1$m$.$

Sketch plan and cross sectional

view of rockbolt reinforcement

systems $\text{'}$ with $\text{'}$ a$\text{'}$ scale $1$:$100.$ Show

all' parameters' provided above. $\text{'}$At$\text{'}$

last,'indicate'which'rock'bolt'you'

use. $.$