There was a dire 1970's or may be early 80's attempt at the first book of 'The Lord of the Rings' trilogy. It had the lead actors rendered by an effect that made them look like pen drawings and the minor characters where old fashioned 2 D animation. The idea was that the rest of the trilogy would be financed by the takings of the first movie. Nothing more was heard of the venture though I did see DVD's of it advertised when the 'new' LOTR movie was released. (sorry nothing about mines but dwarrowdelf may enjoy it)
I saw the animated version many years ago and it made no impression on me at all.
Talking of animated films, "Watership Down", which I still enjoy, has plenty of underground material. The mine dig I work on at weekends is like a rabbit warren, so to my mind at least, it's not stretching things too far to imagine that much of the action is taking place in some kind of nightmarish mine!
As a general rule animated films are not my cup of tea, but the "old fashioned" animation of the above film against painted backdrops is rather effective. (you can keep cheesy Walt Disney) :zzz:
'I wonder how many breakfasts, and other meals we have missed inside that nasty clockless, timeless hole?'
'The Hobbit'
J R R Tolkien.