An alliance of groups opposed to the proposed Adani coal mine are stepping up their campaign, targeting Labor leader Bill Shorten ahead of his party's national conference starting this weekend.

The Stop Adani Alliance - which claims two million supporters among its 38 member groups - will on Thursday unleash an advertising campaign and release polling showing four in five respondents want the government to intervene to stop the project.

More of this to come: Adani protesters confront Labor leader Bill Shorten and the Federal Member for Batman Ged Kearney in March this year. Credit:AAP

The first of a three-phased strategy will involve a so-called "summer of action", aimed at pressing federal Labor to shift its ambiguous stance on the mine, which has the potential to open up the huge new coal province in Queensland's Galilee Basin if it proceeds.

Mobile billboards will buzz the ALP's National Conference in Adelaide, while organisers within the event will try to raise the Adani issue during Sunday's debate on Labor's climate platform.