Resident Janine Rouvray said some properties had been on the market a "very long time for a very reasonable price".

"Talking to real estate agents, a lot of the problem is the mine," Ms Rouvray said.

"If you want to sell you have to reduce the price, so the mine devalues your property."

Ms Rouvray said the Mandalong mine would soon make its way under her property.

"I love my property and I'm anxious about the mine coming under here," she said.

"If subsidence occurs, you have to deal with the Mine Subsidence Board and there's all sorts of horror stories about that."

Ms Rouvray has concerns about how Centennial Coal, which owns the mine, manages land it owns in the area.

She said some of the land was environmentally sensitive and included wetlands, but the company had allowed stock to graze on it.

At a community meeting last month, Centennial representative Alan Blakeney said the company had tried to address the problem.

He had met catchment management authorities to apply for money to fence and rehabilitate the area.

Mandalong Community Association vice-president Rob Kothe said the community was concerned with land and wetlands management, surface drilling, noise, environmental effects and methane emissions.

"We are engaging with Centennial to ensure they are consulting more with the community," Mr Kothe said.