[submarinerswife]

What is a “powder smoke” burn and how does it work?

[rellimpank]

--I have never heard that expression before and it makes no sense--

--a "burn" or "burn cut" describes the center holes in a drilled "round" in a "face" , which is the exposed rock in which one drills the holes, which are then filled with explosive and detonated----

--as far as burning "old powder" underground , that would be a poor way to dispose of it--