definitely NOT a miracle, just hard work from committed people on top, & correct action from experienced cool-headed miners down below. No angels, no divine intervention. Does makes you wonder why people are still doing this. We shouldn't be burning coal for most things any way, and it shouldn't be the 'property' of some 'owner' who can exploit labor to mine his riches for him.

Makes me want to sing Merle Travis' 'Dark as a Dungeon' a few hundred times.