How big would be?

This is more less how big I picture this rescue product inside of the mine (2x3x2m). This size can change depending the necessities.

Taking direction B

what would be my opportunity in direction "B"

I think direction “B” would be the way to go; I picture a mid-size product or small and versatile vehicle which might helps rescue maneuvers to bring people outside of the mine in case of accident and control the beginning of the emergency situations. This design should be thought for teams of 4 to 15 miners and would be operated by the closest person to the accident.