Results
Protection of personnel and assets on the North Wall and adjacent workings via integrated rockfall controls.
Operations maintained with controlled interfaces on the haul road during multi-site delivery.
Low-maintenance system aligned to owner requirements and site access realities.
Delivery consistent with the defined design life for the mitigation package.
Project
Solution
Design–build installation of rockfall attenuators, flexible rockfall barriers, and drape mesh, supported by scaling, rope access, and anchoring.
Sequenced works across multiple treatment sites with active traffic management to minimise operational impact.
Engineered for a 7–8 year design life to meet the mine’s planning horizon.
Utilised light, mobile specialist equipment to overcome difficult access and reduce site disturbance.
Project
Challenges
High-altitude, high-rainfall environment with frequent rockfall from altered mudstones and thrust zones.
Steep batter geometry (25–30 m vertical at ~60°) with typical failed blocks 0.5–1.2 m in diameter (larger in clusters).
Required to maintain mine operations and traffic control on the main haul road while treating multiple sites.
Owner sought a low-maintenance solution with light, mobile specialist equipment due to extremely difficult access.
Project
Overview
The Porgera Gold Mine sits at 2,200–2,700 m in PNG’s Enga Province and experiences frequent, high-volume rainfall. The North (and South) Walls comprise altered mudstones intersected by thrust zones, driving preferential weathering, slips, and rockfall. Underground development on the North Wall required further exploration within a high-risk rockfall area, prompting a design–build mitigation package. Geovert’s solution combined rockfall attenuators, rockfall barriers, and drape mesh tailored to mine operating constraints and a defined service life.