opencast mining 露天开采法
opencast mining plan [矿业] 露天矿矿图
opencast mining machinery 露天采矿机械
opencast mining method 露天开采法
Opencast Mining Technology 安家岭露天矿排土场稳定性分析及工程治理 ; 安全系统工程在露天煤矿生产中的应用 ; 露天采矿技术 ; 露天矿事故的成因和预防
opencast mining equipment 露天采矿设备
combined underground and opencast mining 露天与地下联合开采
changing underground into opencast mining 地下开采转露天开采
opencast coal mining 露天采煤
opencast t mining 露天采矿 ; 露天开采法
Opencast mining by an American company began in 1956, and continued after it was nationalised in 1973.
美国一家公司于1956年进行露天开采，一直到1973年秘鲁将其国有化。
Based on geological model of deposits and by means of CAD method, the authors put forward the building method of layered opencast mining geological model, whose layers are composed of bench.
本文提出了在矿床地质模型的基础上，应用CAD技术。建立以台阶为单元的分层式矿床开采地质模型的方法。
It is necessary that stripping plan be timely provided during the opencast mining.
露天矿生产过程中，需要及时提供采剥工程平面图。
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