Okay, I fell foul of the new mining mechanic.. (I must really suck with M&M)
Mined a boulder and saw the dust falling.. I then erected a mine support a short distance away from the dust thinking this would stop it (i.e. the cave in spot was within the orange circle)
it didnt.
I now have 9 random blocks within my mine (into the starting mined area as well).
Is there anyway to stop the cave in after it has started? or is it a foregone conclusion and we should shore up our mines in advance?