A Coroner's investigation into three deaths at Queenstown's Mount Lyell mine can restart after the Supreme Court ruled seven previously withheld documents will be made available.
Coroner Simon Cooper is investigating the 2014 death of 53-year-old Michael Welsh who died in a mudrush at the Mt Lyell mine.
The inquest is also looking into the 2013 deaths of miners Alistair Lucas and Craig Gleeson, who died after a platform they were working on collapsed.
Copper Mines of Tasmania wanted to keep a report by mining consultant John Webber out of the inquest, because it denied procedural fairness.
However, the court has ruled for the seven documents to be included.
The company has already been fined $225,000 over two of the deaths.