I do the song in Bm, using a capo and an Am configuration.
(Am)I'm going down that coal town road
(C)Listen to my (Em)rubber tires (Am)whine
(Am)Goodbye to buckeye and white sycamore
(C)I'm leaving (Em)you be(Am)hind
Now(C) I've been a coal miner (G)all of my days
(C)Layin' down (G)track in that (F)ho-(G)ole
Got a (C)back like an ironwood
Bent by the wind
(C)Bloodveins as (G)blue as the (Am)coal.
Please remember I'm winging this without a guitar with me, but if I've got anything wrong it would be an Em in a place or two where I'm remembering it as a G.