砂金开采对多年冻土和环境的影晌

Effect of Gold Mining on Permaforst and Environment

大、小兴安岭多年冻土区,是我国重要的砂金产区之一,该区采金历史悠久,采金数量多、规模大、挖掘深。大量实践证明:采金前各项基建准备、采金剥离预融、沙里澄金、深层翻采各过程及废水、尾矿砂等,对多年冻土造成严重影响。采金对多年冻土影响的速度快、面积大、范围广、最直接,是其它各类人为活动无法比拟的。

The permafrost region of the Greater and Lesser Xing'an mountains is one of the most important placer gold production sites of China, where the mining history lasts very long, the amount of gold production is large, the production is in large scale, and the unearthing is very deep. A lot of practice has proved that the permafrost has been seriously affected by the miscellaneous fundamental construction before mining, by stripping and prethawing for gold mining, panning gold from gravels, and by the processes of upturning deep sediments, waste water and tailings, etc. The effect of gold mining activities on permafrost is very fast and direct. It covers a large area and surpasses all other human activies.