It would depend on the detail the mine put into the orginal drawings. In my limited experience I have not seen tracks marked on the maps I have looked at. Then again I'm not sure the mines I looked at even used rail.
It does not look like Illinois is posting the old maps at this time. But here is what they are posting:
http://www.isgs.uiuc.edu/maps-data-pub/coal-maps/county-index.shtml
Indiana does post old maps:
http://coalminemaps.indiana.edu/
But you will have to find the mine then click on the "I" button for information and click on the mine. It will bring up an image link.