Designers often default to longer bolts when movement persists. In interlocked blocky rock, insufficient areal coverage leaves release paths open even with high-capacity elements.
Patterns we validate in 3DEC/UDEC before detailing:
• Staggered vs. rectangular grids around excavations and corners
• Face bolting sequence relative to round length and blast damage
• Interaction with mesh, shotcrete timing, and pre-support tubes
• Sensitivity to joint persistence assumptions from mapping windows
Publish bolt demand as both capacity and coverage metrics so construction teams can spot substitutions that look equivalent on paper but change the kinematic solution.