Results
Successfully delivered a depressurisation system that improved west wall stability and reduced slope failure risk
Eliminated the need for constructing drill pads or access roads, reducing environmental footprint and cost
Proved the capability of the Spider excavator for geotechnical works in extreme terrain, expanding Geovert’s fleet capability for future projects
Project
Solution
Deployed a Spider excavator, capable of self-levelling and working on extreme gradients, providing safe access without the need for benching or pads
Down-the-hole (DTH) drilling to depths of up to 40m, ensuring accuracy and stability in fractured rock
Installed water-level monitoring sensors in drilled holes, enabling continuous performance tracking of the depressurisation system
Grouted holes post-installation to maintain structural integrity and prevent uncontrolled seepage
Integrated safety measures including modified rigging systems and heat-management protocols to suit the harsh climate
Project
Challenges
Extreme Northern Territory climate with high heat and humidity impacting crew and equipment
Steep slope angles made conventional drilling equipment impractical
Need to achieve precision drilling while maintaining crew safety on difficult terrain
Project
Overview
At McArthur River Mine in the Northern Territory, a program of depressurisation drilling and instrumentation was required to improve slope stability on the west wall. The scope involved installing sensors and drilling holes up to 40m deep in steep, difficult terrain. To deliver the works, Geovert introduced the Spider excavator into its fleet for the first time, an innovative solution that enabled safe, efficient operations without the need for access roads or constructed drill pads.