Mining company Adani has admitted to clearing six hectares of bushland to build tracks and drill pads near boreholes on its giant Carmichael mine, without declaring this in its regular reporting to the Queensland government.

Now conservationists accuse the company of breaching the Oaths Act because lodging the reports include signing a statutory declaration.

Borehole 30 built on Adani's Carmichael Mine. The company says it has approval to use the borehole for water and soil testing. Photograph taken in May 2018. Credit:Coast and Country

Overall, Adani cleared about six hectares of land to access six groundwater test bores and five groundwater bore holes.

The total land cleared was about the size of 10 residential lots in Brisbane.