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Industry collaborates on Acid Rock Drainage Guide

机译：工业界合作制定《酸性岩石排水指南》

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摘要

Acid rock drainage (ARD) is one of the mining indus-try's most serious and po-tentially enduring environmental problems. ARD is caused when sul-fide-bearing rock is exposed to oxy-gen and water during earth mov-ing activities, such as mining, road building or construction. ARD can result in extensive water-quality impacts. Fortunately, technologies are available to prevent ARD for-mation, but they are not currently applicable to all ARD sources. In some older mines, now closed, we are not able to apply modern ap-proaches. They can continue to pro-duce ARD and represent a signifi-cant liability to mining companies and governments.The high liability costs of ARD carried by many mining companies and governments are a clear indica-tion of the gravity of the problem. In 1997, the estimated financial li-ability at mining sites was estimated to be A 0.9 billion dollars in Australia; C3 dollars to C 5 billion dollars in Canada; and US 2 dollars to US 35 billion dollars in the United States. There is no doubt that, with the increased level of mining and the greater demands for companies to leave a positive legacy from their closed mines, these numbers have increased in the past decade.
机译：酸性岩石排泄（ARD）是采矿行业最严重且可能持久的环境问题之一。当在采矿，筑路或建筑之类的土方活动中，将含硫化物的岩石暴露于氧气和水中时，会引起ARD。 ARD可能导致广泛的水质影响。幸运的是，可以使用各种技术来防止ARD的形成，但是目前它们并不适用于所有ARD来源。在一些现已关闭的较老的矿山中，我们无法采用现代的方法。他们可以继续生产ARD，并且对矿业公司和政府构成重大责任。许多矿业公司和政府承担的ARD的高负债成本清楚地表明了问题的严重性。 1997年，澳大利亚矿区的估计财务责任估计为9亿澳元;加拿大的C3到C五十亿美元;在美国则为2到350亿美元。毫无疑问，随着采矿水平的提高和对公司从封闭矿中留下积极遗产的更大要求，这些数字在过去十年中有所增加。

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