|
Subject: to create undercuts or caves with haulage access; ore is extracted from the cave mining. At the ____ underground mine, XXX plans to use block caving extraction technology, which allows for bulk mining of large, relatively low grade ore bodies.The technology involves the use of explosives to create undercuts or caves with haulage access; ore is extracted from the cave as the rock above falls unto the undercut. cave - карст?
Если так, то ore is extracted from the cave - руда извлекается из карста? Для меня это темный лес...
|