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美国的金属矿业处于激烈的竞争之中,技术先进、经营有方者存,反之则亡,因此美国矿山的设备与技术是很先进的。本文报道了美国金属矿业的萧条景况,还报道了美国露采与坑采的方法、安全生产与环境保护状况、政府学校与产业部门的关系。在美国,除大型矿山之外,星罗棋布的家庭与个人小矿业也因地制宜地发展着。低品位贵金属的堆浸法生产、矿业公司的灵活经营方针、政府地质部门的服务态度都是很值得借鉴的。
The metal mining industry in the United States is in fierce competition, with advanced technology, well-run business, and vice versa, so the equipment and technology of the U.S. mine are very advanced. This article reports on the depressions in the metal mines in the United States. It also reports on the methods of open pit mining and pit mining in the United States, the state of safety in production and environmental protection, and the relationship between government schools and industrial sectors. In the United States, in addition to large-scale mines, dotted-line home and personal small mines also develop according to local conditions. Low-grade precious metal heap leaching production, mining companies flexible management approach, the government departments of geological services are very worthy of reference.