A new model for determining flyrock drag coefficient

• Flyrock is probably the most dangerous adverse effect of blasting due to its potential to cause injuries to personnel.
• Proper selection of drag coefficient improves precision flyrock throw determination and safe distance definition.
• High-speed cameras were used to film flyrock events.
• Terminal velocity concept was developed and used as method for drag coefficient determination.
• The acquired results prove the concept but indicate that the concept can be further developed and improved.