RossM, you appear to have confused stone with fuel (again?) New shafts require iron and fuel.
I am happy to allow some degree of retconning, if you can come up with a simple path that gets fuel to the mines instead of stone, as you don’t seem to have any particular shortage of either, or you can try and dig yourself out of the hole you dug for yourself. Either way, I think you should at least redo this turn of movement.