Taipion wrote:The only way to ever "remove" a pending cavein and the support beam preventing it, is to remove the support beam and let it happen, then remove the mess and mine again more careful.
The cavein adds rubble tiles roughly in the same range as a support beam, so anything outside support-beam-range around the cavein is safe.
Perhaps I misunderstood the issue; that said its not a widespread phenomena usually (like Mine entrance that clears/destroys a 13 square area). Had one recently myself but only 2 squares were effected; but by the 3rth purity had returned to the rubble. Kinda cute really as boulders I had left in branches...were still visible 'behind' the cave-in now.
That said if you mined past it... I'd be run for the entrance side of things when you destroy it... just be safe.