There have been three block model updates for the Gahcho Kué Mine since the 2022 Technical Report, each of which have increased the overall volume of the ore bodies. The interpretation of the external kimberlite contacts was updated based on mining data including blast holes logs and face mapping contact pickups.
This information allowed projection /interpretation of changes to 3-4 benches below the current mining benches, providing a more probable view of kimberlite volumes to be mined in the short term. In addition, several drillholes from the Resource Extension Program were included in the update to Hearne and the surrounding country rock models.
The engineering work done to steepen the pit walls has resulted in ore that is deeper in the open pit coming into the mine plan in addition to a small reduction in waste stripping.
On a full-year basis for 2024 the updated Technical Report has the mine planning to produce 36.3 million carats (on a 100% basis) from the beginning of 2024 to the end of the life of mine, whereas the 2022 Technical Report had 30.8 million carats being produced from the beginning of 2024 to the end of the life of the mine.
Included in the production plan is moving to a lower Bottom Cut-off from 1.1mm to 1.0mm in 2027 which coincides with expected lower global production due to mine closures from 2026 onward. “I am pleased to update the market on the results of the engineering improvements to the mine. We will continue to look for opportunities to optimize production and manage costs” said, Gahcho Kué.
Updated geotechnical pit slope recommendations since the 2022 Technical Report allowed the various pits to be redesigned with steeper walls allowing additional kimberlite to be captured within the pits and an updated LOM plan. The updated LOM plan extends production through 2031 and reflects an increase of 2.7 Mt at 2.0 c/t (5.5 Mcts), relative to the prior LOM plan.
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