waste dump of open pit coal mine
waste dump of surface mine
mine waste accumulation slope
opencast coal mine dump
Waste Dump
排
废渣堆放场
废石推
垃圾场
垃圾填埋场
矸石山
废石堆
排土场
废石场
Changing from open pit mine to underground mine
dangerous waste and medical waste
dealing with waste by waste
organic waste liquid and waste residue