This thread seems to be straying in a number of directions and a number of red herrings have been introduced. Perhaps a measure of clarification would be valuable.
Firstly, the Mine Surveyor ( so capitalised ) is a position specified under MASHAM and relates to the senior member of the surveying staff, whose key role is the maintenance of the overall survey of the workings and the periodic updating of the various drawings and records required by that legislation.
He may, depending upon the size and scope of the mine in question, be a working surveyor, an administrator and data processor from a surveying background, or anything in between. The individuals seen at the face projecting lines and similar functions may be subordinate members of the survey department called "linesmen".
The Mine Surveyor is a separate career path from the Mine Manager and does not become a Mine Manager in any normal circumstances.
Like all MQB qualifications, he is specifically required to have a minimum number of days working at the face of a UK coal mine and nowhere else. This specifically excludes individuals qualified under schemes such as the South African Chamber of Mines or its Australian equivalent.
The syllabus for the practical exam appeared to me, to have been written in the late 1970s and never updated.
MQB also exclude other management qualifications on the same basis.
I'd be curious to hear more regarding the blasting incident. It was, at one time, common practice in hard rock mines to split rocks ( usually on the grizzly ) using ad-hoc charges consisting of slices of a stick of blasting gel, typically moulded into place and ignited with a detonator or simply a hammer blow. These slices would be two or three times the thickness of a coin.
I haven't seen this done since the 1970s, and even then it was rare.
I haven't seen black powder used in a commercial mine, although I have seen it used for small controlled blasts such as splitting brickwork away from concrete during demolition. It is used in considerable quantities in firework manufacture and by enthusiast groups such as the Sealed Knot.
Whether it is still used for dimensional stone or slate, I have no knowledge
Black powder does not, in fact, explode when ignited in a loose condition ( this was demonstrated recently on the "Mythbusters" programme ) but produces a flash and lots of smoke. Nor does it require detonators, but is simply ignited using a fine-grain powder made for the purpose.
Six sticks of gel in an untamped, unconfined detonation would produce a great deal of noise and a considerable shock wave, but little effective rock-breaking force
''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.