Aduunchuluun coal mine Wikipedia
The Aduunchuluun Coal Mine, also written as "Aduun Chuluun" coal mine (Mongolian: Адуун чулуун, horses' rock) is a coal mine located next to Choibalsan city in Dornod aimag of eastern Mongolia.The mine has coal reserves amounting to 423.8 million tonnes (417,100,000 long tons; 467,200,000 short tons) of coking coal, one of the largest coal reserves in Asia and the world.