As Chris adeptly pointed out we have visited this area, before, I looked for the posting but could not find it.
I am still, and probably, always will be a sceptic.
However, I certainly would always be wary of these places which seem to 'project' bad feelings.
Jessie Fisher, or Rogerly mine, told me off an instance that occurred to him and his mining partner, last year, which illustrates this point.
These American miners, are not mean with their timbering!
Last season, about 3 months, they spent close on £10k on timber! Yet they were in a small passage, which was difficult to prop, and the roof looked pretty solid.
They decided it was time to go for lunch, and when they came back, several large pieces of the roof had come down, right on top of where they had been before eating!
You cannot be to careful underground!