The Queensland Government has asked coal mining giants to contribute tens of millions of dollars for a regional infrastructure fund, as Treasurer Jackie Trad rules out a hike to royalties in next month's state budget.

Key points: Jackie Trad says miners responded well to the proposal and have gone away to discuss it

Jackie Trad says miners responded well to the proposal and have gone away to discuss it In return for agreeing to fund regional infrastructure the State Government will freeze royalties

In return for agreeing to fund regional infrastructure the State Government will freeze royalties Either way, Ms Trad says royalties will not be increased in next month's state budget

Ms Trad made the pre-budget announcement this afternoon, saying the State Government would contribute $30 million towards the fund over three years, with private coal companies being asked to top up the fund to $100 million.

In return for that commitment, she said royalties would be frozen for longer.

The fund will be used for regional infrastructure projects, although specific plans are yet to be announced.

Ms Trad said she met today with representatives of Queensland's largest mining companies to discuss the proposal..

"I'm very pleased to report that the meeting was very positive," she said.

"Coal royalties will not be increased in this year's state budget.

The Queensland Government wants coal companies to donate money to a regional infrastructure fund. ( AAP )

"They haven't changed in seven years, but we know that the industry is looking for certainty.

"We also know that regional communities are looking for more from both government and industry to the communities in which they operate.

"If there is an agreement from the mining companies around this community infrastructure fund then we will make a commitment to freeze royalties for three years."

However, Adani has confirmed its representatives were not invited to the meeting and had not been consulted on the proposal.

Ms Trad said the companies she met with would now take the proposal to their boards and executives.

"It's completely voluntary but I know that in all of these regional communities where companies operate I know that they will be incredibly happy about the Government and industry working together to deliver much better outcomes for these regional communities," she said.

Royalties are charged on minerals mined either as a percentage of the value or a flat rate per tonne.

A freeze on those rates would offer the miners more certainty.

If they agree to the plan, Ms Trad said it would be reviewed after 12 months.

QRC chief executive Ian Macfarlane says miners want to ensure the regions "don't miss out". ( ABC News )

Queensland Resources Council CEO Ian Macfarlane welcomed the offer of a three-year royalty freeze, but said it did not match the LNP's offer of a freeze until 2024.

"We're out there in the regions, we give large sums of money, tens of millions of dollars, to regional community groups," he said.

"We're prepared to sit down and have further discussions (with the Government).

"We've got about 150 people we've got to talk to in the next 24 hours if we are to be able to come to an agreement with the Treasurer but we will do everything we can to make sure that regional Queenslanders don't miss out."

'Workable solution to Government's problems'

University of Queensland Professor of Economics John Quiggin said there were advantages for private companies that donate to the fund.

"There's an obvious benefit in terms of social licence. Obviously they're going to come under increasing pressure, have already come under a lot of pressure," he said.

"So collectively there's the obvious question is which companies will pony up the money for the benefit of the industry as a whole."

"Obviously there's all sorts of little bits of sponsorship that companies do, but this would be a substantial increase, I think, on the scale of assistance that the Government is asking for.

"Clearly, I think the coal industry has made a big noise about how much it's doing for the community, and given the political difficulties of an explicit tax this may be a workable solution to the Government's difficulties.

"Obviously the election outcome suggests a big concern about jobs, and the Government wants to be seen to be doing something, and that will be particularly important if the promised jobs in the coal industry don't come through."

Court ruling places question mark over LNG royalties

Queensland Treasury is also facing the prospect of having to pay back tens of millions of dollars in royalties to gas consortium Australia Pacific LNG, after the Supreme Court recently ruled the 2015 deal struck by former Treasurer Curtis Pitt was invalid because of the way it was calculated.

The court is yet to make a ruling on how much the Government needs to pay back.

Opposition Leader Deb Frecklington said it could significantly affect the upcoming budget.

"We've now seen another budget blunder — we've got a big budget black hole," she said.

"It'll be interesting to see how Annastacia Palaszczuk and Jackie Trad fill in this black hole."