7. When working quarry faces the following should be considered:
- Has the Geotechnical Assessment identified planar, wedge, toppling, rotational or any other type of in-bench failure mechanism or rock fall?
- Is a rock trap required? If so, has it been incorporated into the Quarry Design and ‘Excavations and Tips Rules’?
- Does material at the top of the face need to be within the reach or capture capability of the excavator/loader?
- Is the excavator/loader always in a safe position, for example is the cab outside of the rockfall / sand engulfment zone?
- Is the excavator/loader capable of controlling the largest rock?
- Are the excavator/loader, loading pad/platform and rock pile stable?
- Is the bench wide enough for loading and long-term maintenance operations including access, drainage, scaling, stand-offs, edge protection and rock traps where needed?
- Have faces, benches and stand-offs been designed stipulating widths, heights and angles, and size and type of excavator/loader?
- Is the crest susceptible to ‘back-break’ following blasting operations?