Iron Ore Operation, in the Pilbara, Western Australia
Cut-off grade mapping
- The mine is an iron ore mine, with the ore-waste boundary unable to be mapped visually.
- The exact location of the high-grade ore boundary is critical to the mine’s performance, as the processing facility is constrained and ships are scheduled based on the plant forecasts.
- This means that errors in the delivery of the plant forecast impact on demurrage costs, as well as direct mining and processing cash costs per tonne.
- The current method used by the mine geologists to manage this impact is to use the geological model to determine approximate location of boundaries, and then set dig limits that ensures that no low-grade ore is accidently processed when it was not scheduled to be processed.
- This impacts on the ability to fully recover the mineable reserves of the operation, reducing the life of mine and increasing cash costs.
- By using OreSense® LV each day, the mine geologists create accurate face maps, that feed into the production plans and dig sequences for the mining equipment.
- This means that the mine can maximise the recovery of its’ mineable reserves, while simultaneously reducing process variance.
- This results in a lower cost per saleable tonne for the operation and also means that the mine geologists can focus on strategic opportunities for the mine.