The Chandgana Coal Mine is a coal mine located in eastern Mongolia. The mine has coal reserves amounting to 1.17 billion tonnes of coking coal, one of the largest coal reserves in Asia and the world. The mine has an annual production capacity of 3 million tonnes of coal.
Chandgana Tal coal was first discovered by Russian surface reconnaissance in 1941 and subsequently explored in detail in 1962-1963. In 1967, a small mine was opened to supply heating coal for local consumption (Öndörkhaan city) and the mine has operated more-or-less continuously since, producing up to 20,000 tonnes of coal per year.