他们曾在这个小山坡上开采矿石。
将分析结果应用于工程实际，为三山岛金矿新立矿区海底安全高效开采矿石资源提供了技术保障。
The analysis results were used in the practical engineering, providing a technical support to an efficient safety under-sea mining in Xinli mineral zone of Sanshandao Gold mine.
露天开采比地下开采有很多的优越性，但缺点也是非常明显的，那就是在开采矿石的同时，还要剥离大量的岩石。
The open-pit mining has more advantages than underground mining, but its disadvantages is also very obvious, that is, a lot of rocks are also peeled in minerals exploitation.
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