Scenes in the Buffalo Kids are taken from which movies?

I've watched the animated movie Buffalo Kids, and it has a surface mine where people are enslaved, working for the movie's villan. I had a distinct feeling i've seen this before, but in a live action movie. So it was a western, I remember the same setting, open surface mine, with wodden platforms, people are enslaved there and at some point there is about to be detonated by the bad guys, and the slaves are locked somehow in cages, someone frees them( a kid maybe?) and the good guy fights the villan. I can very vaguely remember the kid being involved in that final fight, as maybe the villan also had some connection with him and was trying to manipulate him into helping him.