QUESTION $2($PRESSURE SURVEYS$)$

$[18]$

$2\mathrm{.}1$ Differentiate the single$-$base method from the leapfrogging method.

$2\mathrm{.}2$ With an aid of a diagram, illustrate and explain how ventilation in shrinkage stoping method is achieved.

$2\mathrm{.}3$ Briefly describe the surveying procedure of the full volume reduced volume method and state the disadvantages.

$2\mathrm{.}4$ Discuss the preliminary requirements for surveying an area.

$(4)$

$3$