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How to avoid permafrost while depositing tailings in cold climate

机译:在寒冷气候下如何避免在沉积尾矿时永久冻土

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摘要

Managing tailings deposition in cold climate requires specific measures not to create permafrost. The risk of generating permafrost due to tailings deposition exists even in regions where permafrost would naturally not occur. Material being frozen during winter might not fully thaw in the following summer due to added height of the tailings on the surface. Such embedded layers of permafrost should be avoided especially close to tailing dams. Main reasons are to prevent impermeable layers in tailings facilities, and to reduce the risk of having implications if such layers thaw during warmer summers causing increase in pore water pressure, reduced effective stress, and increased water content.
机译:在寒冷气候下管理尾矿沉积需要采取特殊措施,以免产生永久冻土。即使在自然不会发生永久冻土的地区,也存在因尾矿沉积而产生永久冻土的风险。由于表面上尾矿的高度增加,冬季被冻结的物料在第二年夏天可能无法完全融化。应该避免永久冻土的这种嵌入层,特别是靠近尾矿坝的地方。主要原因是要防止尾矿设施中的不渗透层,并降低在较热的夏季融化层导致孔隙水压力增加,有效应力降低和含水量增加时产生影响的风险。

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