针对采矿技术条件复杂的薄矿脉开采，推荐采用有钢筋混凝土护顶的下向分层充填采矿法。
The underhand slice stoping method, with reinforced concrete for roof support, is recommended to mine narrow veins where the mining technological conditions are very complicated.
矿藏丰富的国家那些已被放弃的矿脉又重新开工——尽管开采成本比较高，英国的微型淘金热也可能正在进行中。
Abandoned veins in mineral-rich countries have become viable again-and despite the relatively steep extraction costs, a miniature gold rush might be under way in Britain, too.
IP测量的目的在于寻找正在开采的矿脉的延伸。
IP surveys aimed at finding the extent of a vein being mined.
应用推荐