I'm not even sure they could get that kind of power into the small tunnels they'd be making. Seems to me, if they really can plasma cut rock it would be way ea

I'm not even sure they could get that kind of power into the small tunnels they'd be making. Seems to me, if they really can plasma cut rock it would be way easier to slice out sections and remove large chunks of solid rock. Or chop it into many smaller "bricks" and move those out.