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Added: December 31, 20242024-12-31T07:38:41-05:00 2024-12-31T07:38:41-05:00In: Mining Operations

What is backbreak in rock blasting?

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Backbreak is the unintended fracturing or damage to the rock mass behind the final row of drill holes after a blasting operation. This phenomenon is undesirable as it can compromise the stability of the remaining rock structure and increase operational costs (Kecojevic & Komljenovic, 2019).

Causes of Backbreak
  • Excessive explosive energy: overcharging drill holes or using inappropriate explosive types.
  • Improper drilling patterns: incorrect hole spacing or alignment can lead to uneven stress distribution.
  • Geological factors: natural fractures, faults, or joint orientations in the rock mass (Hustrulid & Lu, 2018).
How to Minimize Backbreak?
  • Optimize drilling and blasting designs to match geological conditions.
  • Use controlled blasting techniques, such as buffer blasting or pre-splitting.
  • Regularly monitor and adjust parameters based on blasting results.
References

Hustrulid, W., & Lu, W. (2018). Blasting Principles for Open Pit Mining: General Design Concepts. International Journal of Rock Mechanics and Mining Sciences, 45(1), 40-50. https://doi.org/10.1016/j.ijrmms.2018.01.005

Kecojevic, V., & Komljenovic, D. (2019). Effect of Explosive Parameters on Rock Fragmentation and Backbreak. Mining Engineering Journal, 71(4), 65-72. https://doi.org/10.19150/MEJ.2019.104567

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