Well, I'd been under the impression (from Jim Rieuwerts' and Trevor Ford's Speedwell edition of PDMHS Bulletin 9-3, 1985) that James Hall's mine had only 1 meer east of the shaft, and eight west, meaning that much of the 'JH cartgate' was a different mine altogether - it would end around the 1st choke.
But the recent reprint of the '91 edition of Cave Science suggests that James Hall's title did indeed abut Eyre's Grove. All a bit confusing, and one would expect some sort of boundary wall or marker to divide the titles. That
may have been Bitch Pitch itself. But there are no other documented mines
west of James Hall on New Rake until it reaches the Linicar area, but lots of hillocks and shaft hollows...
Anyway, below is an intact planked cartgate from another local mine, which shows just how well this could be done. This section is only a few metres long, and was possibly only installed to protect some softer ground, or even a backfilled hole, as the majority of the passage floor is solid rock, and so wouldn't have required planking throughout. The amazing condition is due to a fairly dry environment and zero traffic from cavers, as it's not been explored until recently.
Lower cross-levels in strongly-hading stopes also show remnants of planking under fallen deads, suggesting in many cases that it was a lot easier when working in awkward spaces to drag the stuff behind you, rather than trying to install rails and tram it out...