"Failing forward" to secure oil sands tailings impoundments against catastrophic failures

“失败前行”以确保油砂尾矿库免受灾难性故障的影响

• 批准号: 577109-2022
• 负责人: Simms, PaulPH
• 金额: $ 22.73万
• 依托单位: Carleton University
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=749002
• 关键词: Failing; forward; secure; oil; sands

Tailings are the byproduct of grinding of rock or processing of soil generated by mining, physically resembling a wet mud, and produced in enormous quantities - for example, some of the tailings deposits in northern Alberta can be easily distinguished by the naked eye from the International Space Station, and the dams containing the tailings are among the largest earth structures in the world. Tailings deposits, unfortunately, have a record of dam failure, and, due to the wet and weak nature of the tailings, these dam failures has resulted in large flow slides, often travelling for 10's of kilometres, with devastating effect. One of the most recent notorious failures was in Brumadhino, Brazil, which killed 300 people in 2019. Canada's most well know recent Failure in the Mount Polley dam breach in 2014 in British Columbia, which fortunately did not incur human fatalities, but the tailings did flow into a large freshwater lake, important to the salmon fishery. The goal of this project is to develop criteria that engineers can use to judge the "flowability" of tailings. In other words, in the event of a breach, what is the likelihood of a long runout with catastrophic impacts? The project will reach this goal through physical experiments inducing failure of tailings deposits, at a variety of scales, the largest using a 6 m long 4m high 4 m tall existing test facility. Experiments will be conducted primarily at Carleton University and the University of Alberta, assisted by collaborators with key expertise from the University of Waterloo and the University of British Colombia. The research will be guided by an industry advisory committee, comprised of engineers who are actively working on reclaiming the oil sands tailings deposits.

尾矿是岩石研磨或采矿产生的土壤处理的副产品，物理上类似于湿泥，并且大量产生-例如，北方阿尔伯塔的一些尾矿沉积物可以通过肉眼从国际空间站很容易地区分出来，并且含有尾矿的水坝是世界上最大的地球结构之一。不幸的是，尾矿库有溃坝的记录，由于尾矿的潮湿和脆弱性质，这些溃坝造成了大规模的滑坡，往往长达10公里，造成破坏性影响。最近一次臭名昭著的失败是在巴西的布鲁马迪诺，2019年造成300人死亡。加拿大最近最著名的事故是2014年在不列颠哥伦比亚省发生的波利山大坝决口事故，幸运的是没有造成人员死亡，但尾矿确实流入了一个对鲑鱼渔业很重要的大型淡水湖。该项目的目标是制定标准，工程师可以用来判断尾矿的“流动性”。换句话说，如果发生违约，长期运行并造成灾难性影响的可能性有多大？该项目将通过各种规模的诱发尾矿库破坏的物理实验来实现这一目标，其中最大的一个使用了6米长4米高的现有测试设施。实验将主要在卡尔顿大学和阿尔伯塔大学进行，并由滑铁卢大学和英属哥伦比亚大学的关键专业合作者提供协助。该研究将由一个行业咨询委员会指导，该委员会由积极致力于回收油砂尾矿沉积物的工程师组成。