Federal Resources Minister Matt Canavan has conceded the future of the giant Adani coal mine is in doubt following the likely re-election of the Queensland Labor government.

The billion-dollar project was a hot button issue in the state campaign with activist group GetUp! running hard on the issue and high-profile protesters dogging candidates at events throughout the month-long campaign.

The issue divided voters, with support for the project in jobs-hungry areas such as Townsville and Mackay but opposition in inner-city suburbs of Brisbane.

Anti-Adani protesters haunted Premier Annastacia Palaszczuk​ during the first week of the election campaign before she announced Labor would veto a $1 billion Northern Australia Infrastructure Facility loan the company had applied for to build a train line to connect the mine to the coast.