New course is comming on July 2026
Vaping and Explosives: What Blasters Need to Know
Vaping and Explosives: What Blasters Need to Know At Petr Explosives Group’s Practical Explosives Training School (PETS), questions about vaping and e-cigarettes come up regularly. Many students ask: “Can I…
Marijuana and Explosives: What Blasters Need to Know
Marijuana and Explosives: What You Need to Know During our Practical Explosives Training School (PETS), we received several questions about marijuana use — specifically, whether licensed blasters can use it…
The Two “8 ms Rules” in Blasting
The Two “8 ms Rules” in Blasting: Why They’re Different and What It Means Today At Petr Explosives Group, students in our education classes often ask: “Why do people talk…
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…
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