Breach of Road BundMines safety alert no. Newsflash | 10 April 2019 | Version 1
An incident occurred at an Open Cut Coal Mine where a truck has breached the bund and rolled over coming to rest below the road level. The Operator was not injured. The causation factors of the incident are yet be determined. Bunding is key in managing the risks associated with vehicles travelling over exposed edges
How did it happen?
Things to Consider
Mines should review the size of bunding along exposed edges where a vertical drop-off exceeds 0.5m and develop appropriate edge protection considering the following:
- The potential risk based on equipment used.
- Vertical drop
- Bund material used and drainage through bunds.
- Vertical drop greater than >5 metres require bunds 3metres high with a minimum base width of 7 metres
- Standard trapezoidal safety berms shall have a minimum height equal to or greater than 50% of the tyre diameter of the largest vehicle regularly using the road (Refer to Figure 6 below)
- Standard triangular safety berms shall have a minimum height equal to or greater than 66% of the tyre diameter of the largest vehicle regularly using the road (Refer to Figure 6 below)
- The roadside facing batter angle of safety berms should be 45 degrees (1Vert. to 1Horiz.)
References and further information
Authorised by Peter Newman - Chief Inspector of Coal Mines
Issued by Resources Safety & Health Queensland