Ok here's another one I'm trying to look up for old time sake.
It was about these miners. They get trapped for a long time. They draw straws and the loser gets his arm cut off to feed the rest, then they are recused minutes after they cut the guys arm off. The rest of the movie is about the guy getting bent and stalking the team of surivors cutting their arms off with a hachet ala Jason Voorhees style. I think the movie was from the 70s. Does this ring a bell?