Explosives Engineering

The 8 ms Rule: What It Really Means

The 8 ms Rule: What It Really Means – & Why It’s Time to Move Beyond It At Petr Explosives Group, we believe great blasting starts with understanding why we…

Row-to-Row vs. Hole-to-Hole Timing: Most Confused Concept in Blast Design

Row-to-Row vs. Hole-to-Hole Timing: The Most Important (and Most Confused) Concept in Blast Design Timing is one of the most critical factors in surface blasting — and also one of…

Timing in Surface Blasting: Understanding Control, Safety, and Efficiency

Timing in Surface Blasting: Understanding Control, Safety, and Efficiency We discussed with our students what to use for proper timing in our blast designs. We have different practical experiences and…

When Do You Need to Placard Your Truck?

When Do You Need to Placard Your Truck? A Practical Guide for Commercial Blasters Transporting Explosives and Detonators By Petr Explosives Group (PEG) In commercial blasting operations, transporting explosives and…

What the Driller Should Report to the Blaster

What the Driller Should Report to the Blaster Why Drilling Data is Critical for Successful Blasting Operations In surface mining and quarrying, the drilling phase is much more than simply…

PART 2. Designing Sand Covers for Blast Flyrock Control: Practical Engineering Guidelines

PART 2. Designing Sand Covers for Blast Flyrock Control: Practical Engineering Guidelines Sand cover can be estimated from the upward energy trying to eject rock, but the cardinal rule is…