SourcingJul 17, 2024
Rio Tinto’s Diamond Production Down 28% in Q2SourcingOct 08, 2024
Rio Tinto Begins New Phase of Production That Will Extend Diavik’s Life
Commercial production has begun underground at the Canadian diamond mine’s A21 pipe.
A sampling of rough diamonds from the Diavik Diamond Mine, which is located in Canada’s Northwest Territories and owned by Rio Tinto. Rio Tinto just announced that commercial production has begun underground at the mine’s A21 pipe.
Yellowknife, Canada—The first phase of commercial production has begun at Diavik’s A21 underground mine, Rio Tinto announced late last week.
The A21 pipe opened in 2018. It was the last pipe commissioned at the Diavik Diamond Mine and has operated as an open-pit mine, until now.
The transition to underground production will be rolled out in two phases.
Rio Tinto approved the first phase in February 2023, investing $40 million in the project.
It authorized the second phase earlier this year, sinking an additional $17 million into underground operations at A21.
Rio Tinto said the construction of the A21 underground mine involved the development of more than 1,800 meters (a little over a mile) of underground tunnels to access the orebody.
It noted there were no lost-time injuries during the 20 months it took to construct the tunnels.
Diavik Chief Operating Officer Matt Breen said, “The A21 underground operation is positive news for our employees, partners, suppliers, and local communities in the Northwest Territories, as it will enable operations to continue through to closure.
“Rio Tinto’s decision to proceed with phase two is a testament to the excellent performance of our Diavik team in successfully developing the underground mine beneath the previously mined A21 open pit.”
Related stories will be right here …
The A21 pipe opened in 2018. It was the last pipe commissioned at the Diavik Diamond Mine and has operated as an open-pit mine, until now.
The transition to underground production will be rolled out in two phases.
Rio Tinto approved the first phase in February 2023, investing $40 million in the project.
It authorized the second phase earlier this year, sinking an additional $17 million into underground operations at A21.
Rio Tinto said the construction of the A21 underground mine involved the development of more than 1,800 meters (a little over a mile) of underground tunnels to access the orebody.
It noted there were no lost-time injuries during the 20 months it took to construct the tunnels.
Diavik Chief Operating Officer Matt Breen said, “The A21 underground operation is positive news for our employees, partners, suppliers, and local communities in the Northwest Territories, as it will enable operations to continue through to closure.
“Rio Tinto’s decision to proceed with phase two is a testament to the excellent performance of our Diavik team in successfully developing the underground mine beneath the previously mined A21 open pit.”
Located in Canada’s Northwest Territories, less than 150 miles south of the Arctic Circle, the Diavik Diamond Mine opened in 2003 and has produced more than 144 million carats of diamonds in the 21 years since.
It is one of three remaining active diamond mines in Canada, alongside Ekati (owned by Burgundy Diamond Mines) and Gahcho Kué (owned by De Beers Group).
Diavik consists of four kimberlite pipes: the aforementioned A21, plus A154 North, A154 South, and A418.
The original life-of-mine plan for Diavik forecast that it would close in 2025, but the two phases of underground mining at A21 are expected to extend the mine’s life into the first quarter of 2026.
Meanwhile, Rio Tinto said it’s begun investing in Diavik’s closure and remediation of the land, focusing on site clean-up, equipment procurement, and other closure readiness efforts.
Earlier this year, the company announced it had completed construction on a solar power plant at Diavik that will provide as much as 25 percent of the power the mine will need for closure work.
The plant’s solar panels are bi-facial, meaning they generate energy from both direct sunlight and light reflecting off snow, which covers the ground in that area most of the year.
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