The most common approach to extracting metal-bearing ore from a porphyry copper deposit is by open-pit mining, although such mines also typically include some underground activities.
从斑岩含铜矿床开采含金属的矿石，最主要的方式是露天开采，尽管这种矿床常会伴随一些地下的地质活动。
To construct the compound pile diaphram using bored piles and jet -grouted piles, and related techniques is an important approach to reinforce the pit wall and protect the building.
采用钻孔灌注桩、高压旋喷桩及相应配套技术建造混合桩连续墙是边坡加固、保护建筑物的一项重要手段。
This paper is a special discussion on the theoretical and practical approach to stability of high slope in Huidong Lead-Zinc Open Pit Mine, Sichuan Province.
这是四川会东铅锌矿露天采场高边坡稳定性理论研究和工程实践的专论。它介绍了这一研究的主要内容及所获得的成果；
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