SHAFT SINKING excavations for an underground raw ore storage bin that, Thyssen Mining says, represent a new record for the company.
“ The twin raises … demonstrates what is achievable when innovation is paired with rigorous planning and safe execution,” it said.
The scope involved excavation of the bin between underground mine levels with final dimensions of 8 m x 15 m x 34 m( width x length x height) – achieved using a dual barrel raiseboring configuration to create an oblong profile. This resulted in 5,576 t of rock excavated and 64 days of schedule savings compared with conventional excavation methods, the company claimed, adding that the project was executed in full compliance with site safety systems and performance expectations, achieving zero recordable incidents.
Based on the dimensions achieved, Thyssen Mining believes this excavation matches the world record for the largest diameter hole pulled using raiseboring techniques, representing a significant technical milestone for underground mining. The project was completed with the company’ s Robbins 123RVF raise bore drill using a reamer designed and fabricated by Epiroc.
It added:“ The successful outcome was the result of close collaboration between BHP, site contractors, suppliers and engineering teams – all supporting a willingness to challenge conventional mining techniques in favour of operational excellence.”
Timberland’ s shaft support
Timberland Equipment Limited supplies not only essential hoisting and winching equipment for shaft sinking contractors but also specialised mine rescue systems for both emergencies and shaft inspections.
It continues to be a leader in the design and build of this equipment, proving out that it is suitable for the harsh environments of the mine construction phase.
The company told IM:“ Every new piece of Timberland equipment is built with the same durability and reliability that have defined our products for decades. In fact, one of the best demonstrations of our engineering excellence is the large fleet of Timberland equipment still operating successfully in the rugged demands of the mining industry. That proven track record gives contractors and mine owners confidence that when they choose Timberland, they are investing in equipment designed to reduce risk, maximise uptime and perform for years to come.”
Timberland’ s ability to provide parts and service to this equipment over the life of the equipment is essential for on time and risk-free project completion, it states,
concluding:“ Timberland continues to build our capabilities in supporting our equipment
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Contractors and mine owners are confident that when they choose Timberland, they are investing in equipment designed to reduce risk, maximise uptime and perform for years to come, the company says
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International Mining | SEPTEMBER 2026 41