China Underground Coal Mine manufacturers - Select 2021 high quality Underground Coal Mine products in best price from certified Chinese Coal, China Mine suppliers, wholesalers and factory on Made-in-China.com.Sep 24, 2021 Glencore considers sale of CSA underground copper mine in Australia. Diversified miner Glencore has reportedly received interest from the undisclosed firm for its CSA underground copper mine in New South Wales (NSW), Australia. The sale of the mine, which produces about 50,000tpa of copper, marks the firm’s third attempt in six years.