In my old EOD teams we used dust to boost our demolition of a structure many times. Bag of flour an a few milisecond delays here an there an economy of resources can take down very large enclosed spaces / buildings.
We got taught a cute little trick using a doubled detcord line with two overhand knots in it inside a plactic PRC-25 radio battery bag filled with about a half canteen cup of flour and an instantaneous Special Engineers Blasting Cap Number 8, not the usual military M7] and a golf-ball sized wad of C4 or 808 with a 50ms delay cap. The one-two punch dust initiator charge would blow the sides and roof off the scrapped-out 40-foot railroad boxcars we got to *dismantle.*
And then we got to blow oil drums using *Lewis Bombs,* baby charges about the size of a tennis ball that were both explosive and incendiary, having a thermite/thermate powder mix kneaded into the C4. And something else, too, which I think I'll not mention.
Better things for better living through chemistry!