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。

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For example, some in this field might work with a mining engineer to coordinate the extraction process and extract the metal from the ore once it has been mined.

例如，从事这一领域的人可能与采矿工程师共同研究提取工艺，从矿石中提取金属。

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Also used in metallurgy, mining, electricity, chemical industry sectors such as metal ore tailings drying and drying of grain and other humidity has a certain range of materials.

也应用于冶金、矿山、电力、化工等部门烘干金属精矿尾矿和烘干粮食等具有一定湿度范围的物料。

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The cut was due to declining mining activity globally due to softening of metal and iron-ore prices.

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