Sole Survivor of Cobar Mine Explosion Faces Permanent Hearing Loss and Long Recovery

Introduction
The sole survivor of the fatal explosion at the Endeavor Mine near Cobar is facing permanent hearing loss and a long road to recovery. Twenty-four-year-old Mackenzie Stirling was working underground with two colleagues when the blast occurred on October 28, killing Holly Clarke and Patrick “Ambrose” McMullen.

Details of the Incident
The trio had descended approximately 700 metres underground for a night shift at Polymetals’ Endeavor Mine to set explosive charges when the blast went off unexpectedly at about 3:45am.

Investigators from the NSW Resources Regulator believe the workers were using a ballistic disc explosive device—a remotely detonated tool that fires a high-velocity steel slug to clear rock obstructions—when the device unintentionally discharged.

“Workers were in the process of setting up when the unintended initiation of the device occurred,” the regulator said.

The Aftermath and Rescue
Stirling, suffering from hearing damage and shock, was airlifted to Orange Health Service before being discharged to recover at home. Her colleagues, 24-year-old Clarke and 59-year-old McMullen, were killed instantly.

Polymetals suspended all mining and surface operations immediately following the blast, while grief counselling was made available to employees across its Cobar workforce.

Family Appeal and Recovery
Stirling’s aunt, Emma Thomas, launched a GoFundMe campaign to support the young miner’s medical and living expenses during her recovery.
“While now recovering at home, Mackenzie has sustained permanent hearing damage and continues to struggle with the traumatic events of that day,” she wrote.
“She faces a long road to recovery and, on top of that, the financial strain of covering bills and medical expenses while unable to return to work.”

The family said community donations would help Stirling focus on healing rather than financial pressures.

Company and Industry Response
Polymetals’ Executive Chairman Dave Sproule said the company and its employees were deeply affected by the tragedy:
“Words fall short of how deeply affected the Polymetals family is by this tragic incident. We’re devastated by what has happened and share our deepest condolences with the families, their friends and our colleagues.”

The company confirmed mining and processing activities would resume in stages this week, beginning with exploration drilling and concentrate transport, followed by planned statutory electrical works. Safety reviews and counselling services for staff are ongoing.

Investigation Continues
The NSW Resources Regulator continues to lead the investigation into the explosion, focusing on safety procedures, blast protocols, and equipment compliance. It will also examine whether existing workplace controls were sufficient to prevent unintended detonations during setup.

Mining safety experts say the incident underscores the dangers of underground blasting and the importance of strict safety systems when handling remote-detonation devices.

Conclusion
As Mackenzie Stirling continues her recovery, the Cobar mining community remains in mourning for the lives lost in one of the region’s worst underground tragedies in years. The incident has renewed calls for stronger safety oversight in Australia’s mining industry, where split-second equipment failures can lead to devastating consequences.