fascinating stuff.
I was working for Foraky Ltd of Nottingham in the very early 80s, mainly on the drilling side but occasionally with the last remnants of their once-extensive mining side.
HMIM required Doe Lea to sink a shaft at the far extremity of their workings for ventilation purposes. Foraky were awarded the contract - probably the last new mining contract they undertook - and I was transferred there for three or four weeks as site agent/engineer.
From recollection the actual shaft was simple, segmental concrete linings around 2m diameter built by underpinning. They may have been surplus rings from a previous contract. Shaft depth was around 40 ft ( 20 rings) with excavation by drill and blast methods.
Doe Lea were at that time owned by SPO Minerals and then informed Foraky that they had no money to pay them! This was the last nail in Foraky's mining coffin, having been overtaken and marginalised by Thyssen and Cementation in the UK and the fall-out from this contract provoked the outright closure of the remnants of the mining division, already imminent and inevitable.
I'm interested that Doe Lea seems to have been working as late as 1991. The drift yard is long closed and the yard served as a recycling depot for the council, last time I looked.
The shaft site, I have no idea. It was a quite out-of-the-way spot and I don't recall its location. It had a small but elaborately-specified stone house but no headframe.
''the stopes soared beyond the range of our caplamps' - David Bick...... How times change .... oh, I don't know, I've still got a lamp like that.