There'll be a major boost to Queensland's coal production if a proposed $5.3 billion coal mine and port goes ahead.

The proposal would open up the Galilee Basin and be linked by a 500-kilometre rail line to a new port on the Central Queensland coast.

The Premier, Anna Bligh, says it would boost the state's coal production by 40 per cent, and lift exports by 100 million tonnes per year.

"This extraordinary project consists of a new mine near Alpha with the potential to produce 25 million tonnes of thermal coal for export per year," she says.

"It also involves a new Australian coal port. This will be the first deep water exporting coal port in a quarter of a century in this country.

"It will be built at Shoalwater Bay, between Rockhampton and Mackay."