Underground Blasting

Underground Blasting
Details the proper procedures for underground blasting - drilling, pre-blast inspection, detonation and post-blasting.
Help us get more films like this online! This film was digitized and uploaded by the A/V Geeks thanks to contributions to this project: www.avgeeks.com/wp2/avgeeks100...

[@Austibong]

'Valhalla Miners' on you tube. its film I took at work,

[@RuzakiL]

Do you have more documentaries videos from MSHA company ????

[@77dangler]

crazy how they use to work under open ground

[@Austibong]

on*

[@msetyntorah804]

fragmentation wasn't fine.. (Boulders)

[@clementkabaso-fd6lb]

Timing