sentences:  The company has mined approximately 1 gigatonne of coal in its history, and has 2.5 additional gigatonnes of coal reserves, making it one of the largest coal companies in the world.Bogatyr Komir operates two mines, the Bogatyr Mine and the Severny Mine.The discovery of coal in the Ekibastuz Basin, where Bogatyr Komir does much of its mining, dates back to the 1867, which was first exploited by a company named Voskresenskiy Mining JSC around the turn of the century.