BMA and mining unions have commenced mediation in an attempt to bring nearly two years of industrial action to an end.
The ongoing fights between the BHP Billiton Mitsubishi Alliance and unions have crippled the miner, causing it to declare force majeure and resulted in the shutdown of the Norwich Park coal mine.
No details of the mediation have been released as yet.
"Given the importance in resolving this long-standing issue and in preserving the integrity of the process BMA and the unions have agreed that they will not be making nay public comment until mediation has concluded," the CFMEU said in a statement.
"Both sides acknowledge that the success of the mediation will rely on confidential, good faith discussion to which all have given their full commitment," it added.
Negotiations and strikes have been ongoing for more than 18 months.