Master Sergey Suprun uses a portable radio set as he stands near a rotary dredge which works on the coal face of the Borodinsky opencast colliery, near the Siberian town of Borodino, east of Krasnoyarsk, Russia October 27, 2015. The Borodinsky colliery, 9 km (5.6 miles) long and more than 100 meters (328 feet) deep, annually produces more than 20 million tons of coal and is considered to be the biggest opencast coal mine in Russia, according to official representatives. (Photo by Ilya Naymushin/Reuters)





A rotary dredge loads wagons with coal at the Borodinsky opencast colliery, near the Siberian town of Borodino, east of Krasnoyarsk, Russia October 27, 2015. (Photo by Ilya Naymushin/Reuters)





Machinist Alexander Kozhakin operates a rotary dredge which loads wagons with coal at the Borodinsky opencast colliery, near the Siberian town of Borodino, east of Krasnoyarsk, Russia October 27, 2015. (Photo by Ilya Naymushin/Reuters)





A general view shows a train along coal faces at the Borodinsky opencast colliery near the Siberian town of Borodino, east of Krasnoyarsk, October 27, 2015. (Photo by Ilya Naymushin/Reuters)





A rotary dredge works on the coal face of the Borodinsky opencast colliery, near the Siberian town of Borodino, east of Krasnoyarsk, Russia, October 27, 2015. (Photo by Ilya Naymushin/Reuters)





Machinist of a loading mechanism Sergey Volkov operates a rotary dredge which loads wagons with coal at the Borodinsky opencast colliery, near the Siberian town of Borodino, east of Krasnoyarsk, Russia October 27, 2015. (Photo by Ilya Naymushin/Reuters)





A dredge works on a coal storage at the Borodinsky opencast colliery, near the Siberian town of Borodino, east of Krasnoyarsk, Russia October 27, 2015. (Photo by Ilya Naymushin/Reuters)





A general view shows the Borodinsky opencast colliery near the Siberian town of Borodino, east of Krasnoyarsk, Russia October 27, 2015. (Photo by Ilya Naymushin/Reuters)





A rotary dredge works on the coal face of the Borodinsky opencast colliery near the Siberian town of Borodino, east of Krasnoyarsk, Russia, October 27, 2015. (Photo by Ilya Naymushin/Reuters)





A dredge loads wagons with coal at the Borodinsky opencast colliery near the Siberian town of Borodino, east of Krasnoyarsk, Russia, October 27, 2015. (Photo by Ilya Naymushin/Reuters)





A coal face is seen from the top of a rotary dredge which loads wagons with coal at the Borodinsky opencast colliery, near the Siberian town of Borodino, east of Krasnoyarsk, October 27, 2015. (Photo by Ilya Naymushin/Reuters)





A driver loads coal for sale onto a truck from a coal dump site at the Borodinsky opencast colliery near the Siberian town of Borodino, east of Krasnoyarsk, Russia October 27, 2015. (Photo by Ilya Naymushin/Reuters)





A general view shows the Borodinsky opencast colliery near the Siberian town of Borodino, east of Krasnoyarsk, Russia October 27, 2015. (Photo by Ilya Naymushin/Reuters)





A rotary dredge loads wagons with coal at the Borodinsky opencast colliery, near the Siberian town of Borodino, east of Krasnoyarsk, Russia October 27, 2015. (Photo by Ilya Naymushin/Reuters)





A general view shows a train along coal faces at the Borodinsky opencast colliery near the Siberian town of Borodino, east of Krasnoyarsk, October 27, 2015. (Photo by Ilya Naymushin/Reuters)