The Queensland government is considering funding a multi-million dollar access road for the Adani Carmichael mine, despite insisting no taxpayer funds would be used to prop up the project.

A Right to Information request revealed thousands of pages of documents relating to potential state government funding of the upgrade of the Elgin-Moray and Moray-Carmichael roads.

The pages were recorded as "official discussions" about Cabinet Budget Review Committee deliberations, while others were redacted because the matter was still being negotiated.