$3\mathrm{.}2$ On a deep level gold mine a main footwall access tunnel $($tramming arterial way$)$ has

been experiencing repeated dynamic loading due to its development through a

seismically active dyke area. This area resembles a highly stressed regional pillar

due to the stopes having been mined out on both sides along the dyke. Annual

rehabilitation has been necessary due to the rockwalls being ejected under high

PPVs$,$ resulting in major production delays. Currently, the support consists of $4$ m

long cement grouted mechanical cable anchors spaced at $1m2m,$ mesh and

lacing on a $1$ m diamond pattern, Oslo straps and cement grouted rockbolts.

What rehabilitation strategies would you recommend to avoid the repetitive

rehabilitation of the tunnel?

Explain your answer using the following process:

$($i$)$ Hazard Identification;

$($ii$)$ Risk Assessment; and

$($iii$)$ Treatment;

applying the Hierarchy of Controls method $($Hazard$,$ Engineering controls,

Administrative controls, PPE, etc.$),$ and continuous monitoring.