Jun 21, 2018· The world's biggest mining companies in 2018. Headquartered in Guixi, China, Jiangxi Copper Corporation Limited (JCCL) has a presence in mainland China and Hong Kong. Image courtesy of Jiangxi Copper Corporation. China Shenhua Energy Company Limited (CSEC) operates coal mines in Inner Mongolia, Shanxi and Shaanxi provinces in China. Image courtesy of Bart Bernardes.