I'm guessing that your doing your doctorate at Cranfield's Shrivenham campus (I'm doing a masters there), If you are and you want to meet up sometime PM me.
I don't know of any explosion mapping that has been done with pyrotechnics, but I do know that quite a bit of mapping work has been done on sparks produced by different materials. The last time I saw this is was in the Journal of Pyrotechnics (JPyro.com I think) or in the Pyrotechnic Chemistry publications by Ken and Bonnie Kosanke.
Hope this helps.
Steve