Question

For a new coal mining operation employing surface mining with blasting to clear an overburden of Shale using 200mm holes and 12m benches, and considering dry rock conditions, the plan is to use bulk ANFO with emulsion cartridges as a primer. The compacted ANFO density is 0.80 g/cm³, and the Powder Factor (PF) is expected to be no less than 0.60 kg/m³. Design a blast to meet the production request of stripping 3,000,000 m³ of overburden annually.

Answer 1

To design a blast to meet the production request of stripping 3,000,000 m³ of overburden annually, a total of 1,800,000 kg of ANFO will be required.

Step-by-step explanation:

To design a blast to meet the production request of stripping 3,000,000 m³ of overburden annually, we need to calculate the amount of ANFO required. The Powder Factor (PF) is given as 0.60 kg/m³, which means that for every 1 m³ of overburden, 0.60 kg of explosives is needed.

To find the total amount of ANFO required, we multiply the volume of overburden (3,000,000 m³) by the Powder Factor:

Total ANFO = Volume of Overburden x Powder Factor = 3,000,000 m³ x 0.60 kg/m³ = 1,800,000 kg

Therefore, to meet the production request of stripping 3,000,000 m³ of overburden annually, a total of 1,800,000 kg of ANFO will be required.