BEIJING, Feb 23 (Reuters) - Chinese miner Zijin Mining Group has received local government approval for the second phase expansion of its Julong copper project in Tibet, the company said in a filing with the Shanghai Stock Exchange on Friday.

The expansion will raise the capacity of the mine by 200,000 metric tons per day to around 350,000 metric tons. Annual output will exceed 100 million tons, making it the largest single copper mine in China, the company said.

The expansion will require investment of around 17.5 billion yuan ($2.43 billion) and enter operation in 2025, the company said.

The Julong project is a joint venture between Zijin Mining Group and Shenzhen-listed Zangge Mining.

($1 = 7.1979 Chinese yuan renminbi) (Reporting by Andrew Hayley; editing by William Maclean and Jason Neely)