Nalaikh Coal MineThe Nalaikh Coal Mine was a coal mine in Nalaikh, Ulaanbaatar, Mongolia. It was the first mine in the country.HistoryThe mine was established on 25 December 1922 as the first mining operation in Mongolia. In 1938, a railway line was built connecting Nalaikh to the city center of Ulaanbaatar to transport the coal from Nalaikh mine. In 1954–1958, the mine underwent technological upgrade and expansion. The mine was officially closed in 1990.