I was watching Modern Marvels on the History Channel this evening and they had a segment about "Joy Mining Co" and while interviewing one of their engineers, he showed them an assembly of their equipment that was modeled in Inventor. There wasn't much more to it though....
Interesting part was how they explained that it had to be designed such that it could be disassembled into pieces that had to fit through a 5' x 5' opening and then re-assembled inside the mine.