God or no God, being trapped in a flooded mine shaft 300 feet underground must be a horrifying ordeal.
Several years ago we visited Mammoth Cave in Kentucky. While there, I picked up a book titled "Trapped! The Story of Floyd Collins". It chronicles the fate of Collins, an amateur spelunker who became trapped in a tributary of the Mammoth Cave system back in the 1930's, and the desparate, at times misguided attempts to rescue him. It was a gripping tale, and despite widespread publicity at the time, the rescue was ultimately unsuccessful.
I do hope these men have a better outcome.