@Captain C 19181 wrote:
The short answer to that is YES. We obtained the records from the NCB and it clearly passes under the proposed site and is the reason the why fields have sunk and that the Straight Mile is no longer flat and has a blind summit sign half way along it.
Are you sure that is correct. Not about the location but the subsidence you refer to.
My understanding from those who worked underground is due to the depth of the mines any downwards movement would be insignificant and in any case it is the earth’s crust pushing up that collapses the mines.
I used to imagine that were loads of tunnels underground from where the coal was removed. The reality is they didn’t shore up the roof behind the machines and the space behind just backfilled naturally as it moved forwards.