Dear Mike,
 
Thankyou for your additional information. 
 
V.interesting to see the phenomenon was noticed elsewhere other  than 
Derbs.. What of the other mining areas I wonder? - N./Mid./South Wales  (slate or 
metal - never noticed any ref.), Devon & Cornwall, IoM,  Ireland, 
Shropshire lead mines, Ecton copper area, Leadhills and other Scottish  metal mining 
areas? Indeed, was such noticed in coal mines as well? With the  latter, I 
do not recall reading of such occurrences directly attributed to this  
phenomenon in any Inspectors Reports - though the 'bursting' of coal in this  
instance would be more due to settlement than to fault stresses - therefore a  
'true' fault stress 'event' would probably have been put down to ground  
settlement rather than the former. In this I simply surmise, since, apart from  
the basics, I have little knowledge of coal mining.
 
I am not preparing a paper or anything, it's just a matter that has caught  
my attention after re-reading the Special Reports on the Mineral Resources 
of  GB, Vol. XXVI, 1923, where such events were noted and documented in 
Derbs. at  Highcliffe Mine as early as 1738 (where the mine looks to have been 
abandoned  for a while due to it - but the miners worked out how to use it to 
their  advantage and generally manage it), the Odin Mine, and the Gang Mine 
- one  wonders what other mines were affected in the Derbs. area? - for 
example, I  don't recall hearing of such events from Ladywash or Sallet Hole 
miners in  the late 1970's. I certainly don't recall hearing anything from any 
Weadale  miners, nor from slate in the Lake District or N.Wales... but this 
doesn't mean  that it hasn't happened in the past of course!
 
I simply wonder how widespread this might have occurred in GB metal mines  
(or other mines), and whether there are other areas apart from the Pennine 
Chain  that were prone to it as well. 
 
Regards, Bernard