Blasting

Quiz

1. What is the critical first step in the rock-fragmentation process?

2. What are the principal newcomers for explosive formulations that have reached the marketplace?

3. What is ANFO a combination of?

4. What is the benefit of using Heavy ANFO?

5. True or false? Pits and quarries have almost completely moved from the use of dynamites to small diameter, cap-sensitive emulsions and slurries for appropriate applications.

6. What does it mean when explosives are cap sensitive?

7. Bulk-loaded explosives used in hole diameters greater than what size almost always require heavier priming than a detonator alone can provide?

8. What are detonators used for?

9. What types of blasting systems are more commonly used when operating in proximity to built-up areas?

10. Why are electronic blasting systems unique?

Quiz Answers

1. Blasting

2. Emulsions and emulsion-ANFO blends called Heavy ANFO

3. Ammonium nitrate and number-two fuel oil

4. To provide a cost-effective way to increase the energy output of ANFO

5. True

6. The product can be efficiently detonated by a blasting cap or delay detonator of adequate strength, or by compatible detonating cord.

7. 5 in.

8. To initiate the blast. They may be electronic, electric or non-electric.

9. Shock tube, electric and electronic

10. They have eliminated the pyrotechnic delay element and replaced it with a high-accuracy timing "chip."?