What is the most commonly used explosive?

• A. RDX
• B. ANFO
• C. TNT
• D. HMX

Answer: (B)

This question hinges on which blasting explosive is preferred for routine, large-scale rock breakage because of cost, availability, and practicality. The best choice is a simple, widely used blasting agent that combines inexpensive materials with reliable performance for big blasts. It’s commonly produced on-site from readily available components and offers a good balance of energy release and handling practicality, which is why it's favored in mining and construction when large volumes need to be blasted.

Compared with higher-cost, specialty explosives, this option stands out for mass blasting projects because it minimizes material costs while still delivering effective rock breakage. Other explosives may offer higher performance or sensitivity, but their higher price and more stringent handling requirements make them less practical for everyday use where large quantities are involved. The combination of low cost, easy procurement, and adequate blasting effectiveness explains why this explosive is the most commonly used.