There were no injuries in another underground cave-in at the Wolverine Mine, it has been confirmed.

Kurt Dieckmann of the Yukon Workers' Compensation Health and Safety Board said Tuesday afternoon the board was contacted immediately, but there were no injuries.

The cave-in occurred Feb. 16 in an area of the underground mine where preparations were being made to go ahead with ground stabilization work, Dieckmann told the Star.

The board's director of health and safety said information provided by Yukon Zinc Corp. indicates a scissor-lift required to reach high areas had already been put in place but nobody was around when the cave-in came down on top of the lift.

The company, he said, estimates about 500 tonnes of rock fell in.

Yukon Zinc spokesman Shae Dalphond said today company president Ray Mah was unavailable today to comment on how or if the cave-in has affected the company's plans to be in production later this year. The mine is located 180 kilometres southeast of Ross River

Dalphond said Mah is in Toronto attending the annual conference of the Prospector and Developers Association of Canada.

"A future update on this is forthcoming,” Dalphond said from his Vancouver office.

Yukon Zinc is a privately owned Chinese company, with no obligation to post significant developments in operations, unlike publicly traded companies.

The cave-in comes just under a year after a man was killed by another cave-in at a different area of the mine which remains off-limits under a stop-work order the board issued.

Following the fatality, the safety board ordered Yukon Zinc to have a geotechnical engineer prepare a ground-stabilization plan before work could continue.

Dieckmann said most of the stabilization work has been completed, and the area where the cave-in occurred was one of the last.

The company's engineer has filed a new stabilization plan for the area, he said.

There's been no ground-stabilization plan prepared for the site of the fatality so the stop-work order for that area remains in place, he said.

Last year's death of 25-year-old William Fisher of Kelowna, B.C. was the second underground fatality at the Wolverine Mine, following the October 2009 death of 20-year-old Paul Wentzell.

Wentzell died after a piece of machinery rolled down a slope where he'd it parked and struck him. He died a little over four hours later.

Yukon Zinc has been charged with several safety infractions as a result. The matter is still before the courts.

The investigation into the death last April has been completed and is in the hands of the Yukon Department of Justice, safety board spokesman Mark Hill said Tuesday.

Yukon Zinc was originally planning to be in production by the middle of last year, until the fatality occurred.