open pit mining wallpaperProviderpixabayResolution6000 × 4000Aspect ratio1.50:1AuthorNakNakNakSourceOpen original page Download wallpaper Available sizesPreview150 × 99Web640 × 426Large6000 × 4000Tagsopen pit miningbrown coalexcavatorbucket wheel excavatorsraw materialtechnologyindustrystoledegradationoverburden