However, the details of the proposal have not yet been made public due to legal implications.
The NUM, according a SABC report, says the proposal is to be discussed tomorrow with its membership.
Meanwhile, three members of the NUM who were arrested for allegedly setting the employer’s property on fire have been released on warning by the Nelspruit Magistrate's Court.
They will appear in court next month.
The Mbombela Stadium is the new 45 000-seat stadium currently under construction as one of the 10 venues for the 2010 FIFA World Cup. It is located on an open land 6kms west of Nelspruit.
The R920-million sports facility is set to be ready for use by mid-July 2009 - a full year ahead of the June 2010 World Cup kick-off.
No work has taken place at the construction site for the past seven days, as workers had been on strike since Friday.
They are demanding that the employer pay them R800 for night shifts, while the employer wants to pay them R160.
On Monday, the Mbombela Stadium Joint Venture dismissed over 500 workers for participating in an unprotected strike.