The body of Graham Dawson, 62, was recovered from the workings by Queensland Police at Crinum three days after the incident.
Crinum is owned by Sojitz Blue and operated by Mastermyne.
Mastermyne CEO Tony Caruso told an investment conference that the company was monitoring the wellbeing of its workforce and staff following the Crinum incident.
"It was a tragic incident at the Crinum mine during September," he said.
"[Our] health and safety approach is built around strong psychological safety principles which is making the difference."
Mastermyne's Total Recordable Injury Frequency Rate stood at 4.84 at end of September.
"We are continuing our journey towards becoming a recognisable High Reliability Organisation," Caruso said.
"We are managing the changed risk profile with the appointment to coal mine operator."
Caruso said Mastermyne maintained AS14001, AS45001, and AS9001 certification across its accreditation regime.
