If a wall or a false floor collapses underground that may be certain death. It’s best not to provoke such structures, but the inherent disequilibrium of mines can be enough provocation. All you can do is be sensible and hope for the best.
If your rope climbing or descending gear fails that can also easily lead to death. But that’s easier to avoid! I am sloppy by nature, but I am trying to better myself, and while the news on the radio still went on about the four unfortunate Welsh miners I gave my rope ascenders some care. We’re all going to die, but I’ll try not to do that prematurely or avoidably!