The Hunter's thoroughbred industry has brushed off threats on social media against horses in the wake of a recommended rejection of a large mine project.

Angry Drayton South mine workers and their supporters have taken to Facebook to vent their frustration, accusing the horse studs of taking their jobs.

It comes after the Planning Assessment Commission (PAC) recommended the project not proceed.

Some online posts contained threats to "barbecue horses" and spread weed killer on pastures.

Hunter Thoroughbred Breeders president Cameron Collins said he has a lot of sympathy for the miners impacted but the PAC decision was sound.

"The project is not in the region's economic interest," he said.

"It puts thousands of jobs at risk and there's a risk to human health and safety."

Dr Collins said the community must unite in the wake of the decision.

"What we need to do now is understand that one of the industries has not benefited from this decision," he said.

"The community needs to pull together at the moment, and work out ways that we can continue to develop the region's economy without this mine."