Why is guarding ANFO and ammonium nitrate critical when heated?

• A. To prevent unauthorized use
• B. To ensure they are stored properly
• C. To minimize the risk of explosion
• D. To maintain correct temperature

Answer: (C)

Guarding ANFO (Ammonium Nitrate Fuel Oil) and ammonium nitrate is critical when heated primarily to minimize the risk of explosion. Both materials, especially ammonium nitrate, can become unstable when exposed to elevated temperatures and can decompose violently if not handled correctly. This decomposition can lead to explosive reactions that pose serious safety hazards to personnel and equipment.

By ensuring that these materials are kept at safe temperatures and properly monitored, the chances of accidental ignition or explosion can be significantly reduced. Safety protocols involve storing ANFO and ammonium nitrate in controlled environments, using appropriate materials to contain them, and ensuring regular inspections are conducted.

While unauthorized use, proper storage, and maintaining correct temperature are important considerations in general safety practices, they do not specifically address the primary concern of thermal stability and explosive risk associated with these materials. The focus on preventing explosive reactions is foundational in explosive handling and storage practices, making it essential for the safety of mine operations.