my Tutor ( Richard Edwards ) lived somewhere down there at the time, and I went to Pendarves once or twice over the years.. mainly when I was working for Foraky in the early 80s, they had a pneumatic cactus grab plus some other odds and ends on hire there, and I used to go down occasionally with spares.
Foraky closed their mining division entirely in the early 80s, although it had effectively ceased to function several years before, and any hired plant was simply abandoned where it lay, so I wouldn't be much surprised if it was still there.
there were two grabs, from recollection; a huge thing with a span of about 3m, which was a veteran of shaft sinking operations in the 1960s, whose occasional function was sump clearance in the local Nottingham coal mines ( hanging under the cage )
the other one was a smaller one about 2m span, which was hired to various parties over the years. I remember it being used within a small shaft ( about 2.4m dia from memory ) for the now-closed Doe Lea Colliery near Chesterfield. Pendarves had it for shaft-deepening operations about 1981, and I believe it was also at Wheal Jane at one time. It was a dangerous contraption, because if the air supply failed for any reason it would open under its own weight and dump its load - nasty 😮
''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.