What are the main parameters of drilling and blasting operations in surface mining?

Question

Accepted Answer

Main parameters for drilling & blasting in surface mining include blast design, hole diameter, hole depth, explosive type, and blast timing.

Blast design: determining the layout, pattern, and sequencing of blasts to optimize fragmentation and minimize environmental impact
Hole diameter: the size of the drill hole affects the amount of explosives needed and the resulting fragmentation
Hole depth: deeper holes allow for larger blasts but require more precise drilling to avoid misfires
Explosive type: different explosives have varying properties such as energy release and sensitivity
Blast timing: coordinating the detonation sequence to achieve desired results and avoid flyrock

Accepted Answer

the drilling parameters are  bench height, blast hole diameter,  spacing, and sub drilling length and the blasting  parameters are Charge Quantity, stemming length, powder factor, delay time and others.

Asked in Derba MIDROC Cement

What are the main parameters of drilling and blasting operations in surface mining?

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