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Drilling and Blasting duration 3 minutes 38 seconds Drilling and Blasting Drilling and Blasting	Drilling and Blasting rock blast construction nfo feet drilling row dynamite explosives bench bit drill boreholes drills blasting result delay water oil detonator From Thomas Hales 0 likes 4 plays 0
CMT 4150 Spring 2021 Chapter 12 Lecture duration 1 hour 3 minutes CMT 4150 Spring 2021 Chapter 12 Lecture CMT 4150 Spring 2021 Chapter 12 Lecture	CMT 4150 Spring 2021 Chapter 12 Lecture burden rock hole blast gravity equation ratio distance diameter feet stiffness step depth height spacing bit table primer nfo picture From Thomas Hales 0 likes 22 plays 0