Gannin - Going also called shuffling boards, flooring in a mine seam

tynuns - not sure but I think bolts to hold the gannins together

Kelly Turns - Hairpin bend

Limmers - Haunches or haughs ie. sitting down

Timmers - pit props

I also know a verse which goes:

I can set a stand of Timmers, lay a bar or single prop
I can cut me Juds at bottom, I can cut 'em at the top
I tell ye its a marvel lads how I get through the work
While I'm seated in my glory in the Bar room