Heres a pretty decent haul from exploring the abandoned mines plus the epicave/ravine complex. It doesn't include the coal that I had to use for torches though and a question for everybody, when mining/caving, do you usually toss the flint? Also, I was exploring the abandoned mines and collecting rails much of the time, but I did mine wherever I could.
http://img.photobucket.com/albums/v214/smjjames/2012-06-09_154927.png