Public transport services are recovering from anti-Adani protests which brought Brisbane CBD to a standstill and frustrated commuters during peak hour.

EARLIER:

Protesters were chanting "Palaszczuk hear us say, we'll fight Adani all the way."

Queensland Greens Senator Larissa Waters spoke at the rally, accusing the Palaszczuk government of being bribed into approving the mine.

"You know what happened? Money. Donations from fossil fuel companies to all sides of government except the Greens," Ms Waters said.

QUT student and protest organiser Catherine Robertson said they're expecting numbers in the thousands taking part in the demonstration.

"We're expecting a size similar to last time which was 2,000 people," Ms Robertson said.

Ms Robertson said the goal of the protest is the Palaszczuk Government "ripping up" contracts with the Indian mining company.

"We want to disrupt the city so the Labor government takes notice," she said.

"Adani will result in the extinction of that entire part of the state."

During the rally, a member of Uni Students for Climate Justice said protesters had been fined $600 by the Brisbane City Council earlier in the afternoon.

Acting inspector Andrew Bagley said police were ready to minimise disruptions from the protest.

"We're not sure what level of disruption this is going to cause, but we're just trying to keep everyone safe

The intended goal of "disruption" appeared to have been achieved, with commuters reporting delays on the bus network.

One man at a bus stop on Adelaide St said had been waiting 30 minutes for a bus that is held up because of the protest.

Buses whose routes are blocked by the protest are being turned around.