Re: Only cracking I have done is
" I think this how "mine" also came to be used for an explosive device."
The word "undermine" could possibly be assumed to have the same origin - in its figurative usage of an unexpected collapse of a position.
Not sure when someone replaced the burning of the props with a load of explosives. Guy Fawkes didn't have to do any physical mining. The technique was used to devastating effect when multiple underground mines were detonated at Messines in 1917.