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前言小矿开采是件麻烦的事,它是在朦胧之中进行的。写有关这方面的文章很不容易,基本问题是缺乏文献。个人开采在国际技术杂志中极少受到注意。在许多编有产品统计表的国家,全国的总数掩盖了小矿山的贡献。某些纯粹是当地消费的产品,数据资料也许只在矿山经营者和买主的帐本里。最后,就宝石和贵金属来说,有相当一部分产量来自于小型的秘密开采,开采的数量只记在走私者和不法贸易者的心中,或者记在帐本上,偶然也出现在最终目的地
Introduction Small mining is a troublesome thing, it is carried out in the dim. Writing articles in this area is not easy, the basic problem is the lack of literature. Personal mining is rarely noticed in international technology magazines. In many countries with product statistics, the national total obscures the contribution of small mines. Some products are purely local consumption, the data may only be in the mine operators and buyers of the books. Finally, as far as precious stones and precious metals are concerned, a considerable part of the output comes from the small-scale secret mining, the quantity of which is only recorded in the hearts of smugglers and unscrupulous traders, or recorded in the books of accounts and occasionally appears in the final destination