Seismic Liquefaction of Mine Tailings

尾矿地震液化

• 批准号: 1969285
• 金额: --
• 依托单位: University College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2017
• 资助国家: 英国
• 起止时间: 2017 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-1969285
• 关键词: Seismic; Liquefaction; Mine; Tailings

The residual waste from mining processes, or tailings, are most commonly disposed of by mixing the ground rock with water and pumping them as a slurry into large lagoons retained by dams constructed from the coarser part of the tailings. The very loose state of the sediments in the lagoon promotes their liquefaction, so that the consequences of dam failure can be very severe, through loss of life, homes, livelihoods and widespread environmental damage from the release often of millions of cubic metres of waste. Since 1917 there have been more than 245 tailings dam incidents. The failure in 2008 in Xiangfen County, China, caused 277 deaths, but these disasters are by no means restricted to developing economies, and in 1985 at Stava, Italy, the debris flow resulting from the failure of a dam built on a hillside travelled down the valley at 90km/h killing 268. The project will investigate the liquefaction of tailings materials under seismic loading, collaborating with the China University of Mining and Technology, Beijing and Golder associates. The research will be of an experimental nature, by means of advanced laboratory testing in the Geotechnical Engineering Research Laboratory.

采矿过程中产生的残余废物或尾矿，最常见的处理方法是将磨碎的岩石与水混合，并将其作为泥浆泵入大型泻湖，这些泻湖由尾矿中较粗的部分建造的水坝保留。泻湖中沉积物非常松散的状态促进了其液化，因此，大坝倒塌的后果可能非常严重，造成生命、家园、生计的损失，并因往往数百万立方米的废物排放而造成广泛的环境破坏。自1917年以来，已经发生了245起尾矿坝事故。2008年发生在中国襄汾县的溃坝事故造成277人死亡，但这些灾害绝不仅限于发展中经济体，1985年在意大利斯塔瓦，一座建在希尔赛德上的大坝溃坝造成的泥石流以90公里/小时的速度冲下山谷，造成268人死亡。该项目将与北京中国矿业大学和Golder公司合作，调查地震荷载下尾矿材料的液化情况。这项研究属实验性质，在土力工程研究实验室进行先进的实验室测试。