Project: Tropicana Tunnel Strengthening Works - Restoring Safe Access with Flange Tunnel Liner Plates

Client: AngloGold Ashanti Australia

Project Name: Tropicana Tunnel Strengthening Works

Project timeline: July 2023 – September 2023

The Project

Global Synthetics was contracted by AngloGold Ashanti Australia to address a critical safety issue at the Tropicana Gold Mine in Western Australia. The existing escape tunnel, a vital secondary egress point located beneath a stockpile, presented a serious concern. Constructed only 10 years prior, the metal structure had experienced significant deflection due to poor-quality backfill. This resulted in exceeding the tunnel's maximum load capacity by 15%, placing the tunnel at risk of collapse and forcing its closure.

The Challenge

The compromised escape tunnel left the mine with a single access point, a major safety concern. The existing concrete structure required a solution that could be implemented quickly and efficiently while minimising disruption to ongoing operations. The conveyor belt running through the tunnel further complicated the project, demanding a method that wouldn't require its shutdown.

Our Solution

Our expertise in civil construction solutions led us to recommend the 2 Flanged Tunnel Liner Plate system. These corrugated metal plates are specifically designed for tunnel relining and culvert relining projects.

Their key advantages include:

• Superior Load Capacity: Flange Tunnel Liner Plates are engineered to withstand extreme loads, making them ideal for reinforcing and stabilising weakened structures like the Tropicana escape tunnel.

• Cost-Effective Installation: The lightweight design and simple installation process minimise labour costs and project timelines compared to traditional methods like concrete repairs.

• Minimal Disruption: The modular nature of the Flange Tunnel Liner Plates allows for a segmental installation approach. This ensured uninterrupted operation of the conveyor belt throughout the relining project.

During July-September 2023, the new multiplate tunnel was successfully installed within the existing escape tunnel using the Flange Tunnel Liner Plates. These plates were specifically designed to achieve a reinforced 2.3m round shape, significantly enhancing the tunnel's structural integrity. This innovative relining system effectively reinforced the structure, restoring its load-bearing capacity and ensuring safe access for mine personnel.

Global Synthetics is proud to have partnered with AngloGold Ashanti Australia to deliver a successful solution for the Tropicana escape tunnel.  This project demonstrates the versatility and effectiveness of Flange Tunnel Liner Plates in addressing challenges related to tunnel construction, tunnel relining, and culvert relining within the civil construction sector.

Do you have a tunnel or culvert project requiring a reliable and cost-effective relining solution? Contact Global Synthetics today! Our team of experts can assess your specific needs and recommend the best products for your project. We look forward to partnering with you to ensure the safety and efficiency of your underground infrastructure.