Mr Green said the rally would be held on May 25 at Tullah in the state's West, and would send a clear message that Tasmania's mining industry was "open for business".

Tullah, on the banks of Lake Rosebery on the Murchison Highway, is near Venture Minerals' proposed mines at Mount Lindsay, Livingstone and Riley Creek.

The state government has given approval to Venture's Livingstone and Riley Creek mines and is awaiting project confirmation of the Mount Lindsay project.

Mr Green urged people to turn out for the rally, saying the new mines would "revitalise the Tullah township".

"The benefits to the West Coast and broader Tasmanian economy will be enormous," Mr Green said.

"The Riley mine will triple bulk mineral exports through the Burnie port and pour tens of millions of dollars into the Tasmanian economy."

One of the rally's organisers, Australian Workers Union secretary Ian Wakefield, said the projects were of crucial significance to the industry and the West and North-West.

"Mining and the environment can co-exist, and if the Venture Minerals project goes ahead, it'll be a real boon for the region," Mr Wakefield said.

Mr Wakefield said the rally was being organised by the AWU and Tullah Progress Association with support from West Coast Mayor Darly Gerrity.

"It'll be a community event, and a great opportunity to show support for the industry," Mr Wakefield said.

Mr Green said that both he and Premier Lara Giddings would attend the rally.

Liberal mining spokesman Adam Brooks welcomed the rally and said he would "be there with bells on" and hoped to speak.

All projects are still awaiting federal government approval from Environment Minister Tony Burke.