Open-pit coal mining

Numéro d’image : 11650884
Open-pit coal mining
Open-pit coal mining. Excavated coal deposits being loaded onto a truck at an open-pit coal mine. Also called open-cast mining,this technique is used when the overburden,surface material covering the coal,is thin. Rather than using tunnels,the whole area is excavated using heavy machinery such as dragline excavators. This mine is near Kemmerer,Wyoming,USA. The Kemmerer Mine,which has a number of active sites in south-west Wyoming,became one of the world's largest open-pit coal mine systems when it converted to strip mining in the 1950s
Licence : Droits gérés
Crédit: Science Photo Library / Alean, Dr. Juerg
Taille de l’image : 3661 px × 2475 px
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