I was on scene at the black castle mine earlier today. I was there taking photos for the local paper. The person killed there was operating a bulldozer, and accidentally hit an exposed natural gas line. The explosion blew him off the dozer, and he died of severe burns.
This was a surface mine.
They didnt get the victim off the site until several hours later, because it was at such a remote location.
I dont know anything about the other accident site, other than it was an underground mine, and the dead miner was the father of two.