Underground Blasting
ฝัง
- เผยแพร่เมื่อ 27 ก.ค. 2024
- Underground Blasting
Details the proper procedures for underground blasting - drilling, pre-blast inspection, detonation and post-blasting.
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'Valhalla Miners' on you tube. its film I took at work,
crazy how they use to work under open ground
Do you have more documentaries videos from MSHA company ????
on*
fragmentation wasn't fine.. (Boulders)
Timing