Mine Fire at Broken Hill Mine Prompts Investigation and Safety Concerns

A recent underground fire at Perilya's Southern Operations mine in Broken Hill is under investigation, raising concerns about the safety of workers and the use of a ground-stabilizing chemical.

The incident occurred on January 12, around 980 meters below the surface, involving the chemical polyurethane, known as PUR.

The chemical self-heated and ignited while miners were using it to prevent rock wall erosion.

The fire was extinguished, but reignited before being fully put out.

The New South Wales Resources Regulator is currently investigating the cause of the fire.

While a preliminary investigation didn't find any immediate breaches of the Work Health and Safety Act, a review of the mine operators' chemical manifest has been recommended.

The regulator is considering whether additional controls are required across the broader mining industry.

The incident has led to concerns regarding potential health risks associated with the use of PUR.

The miner's union is pushing for stricter regulations on PUR use in mineral-producing mines.

According to a mine site information sheet, combustion of PUR can release toxic carbon monoxide fumes and acrid smoke, and create potentially explosive mists6. Workers have reported feeling unsteady.

The Mine Workers Alliance has established a register for workers potentially exposed to the fumes, to log potential exposure to chemical fumes, in case health complications arise in the future.

According to a mining occupational health and safety expert, PUR can ignite if not mixed properly, reaching temperatures as high as 150 degrees Celsius.

Prior to the fire, some workers reported they were told that PUR was not combustible.

The union is advocating for industry-wide safeguards, pointing out the heavier regulation of PUR in the coal industry compared to mineral mines.

The union has contacted the NSW Natural Resources Minister to push for changes in legislation and to adopt practices from other sectors that would better protect mine workers.