Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
The Use of Waste Rock Inclusions to Improve the Seismic Stability of Tailings Impoundments
Tailings are typically deposited as slurry over an extended period of time. Many types of tailings, such as those from hard rock mines, are fine-grained and cohesionless, making them particularly susceptible to liquefaction. The primary effects of earthquake shaking on tailings impoundments include horizontal loading on the retaining dykes and the development of excess porewater pressures (which may lead to liquefaction) in the retained tailings. Secondary effects can include additional horizontal loading on the dykes due to the strength loss in the tailings and seepage pressures in the dykes due to the dissipation of porewater pressures following shaking. The placement of waste rock within a tailings impoundment to create inclusions of more rigid material could improve the seismic stability of tailings impoundments by providing reinforcement against deformation of the impoundment. Such inclusions can also help dissipate porewater pressures after shaking. The paper presents numerical analyses of a reference tailings impoundment, with and without waste rock inclusions, subjected to a seismic loading and an evaluation of the effects of the inclusions on the dynamic performance of the tailings impoundment.
The Use of Waste Rock Inclusions to Improve the Seismic Stability of Tailings Impoundments
Tailings are typically deposited as slurry over an extended period of time. Many types of tailings, such as those from hard rock mines, are fine-grained and cohesionless, making them particularly susceptible to liquefaction. The primary effects of earthquake shaking on tailings impoundments include horizontal loading on the retaining dykes and the development of excess porewater pressures (which may lead to liquefaction) in the retained tailings. Secondary effects can include additional horizontal loading on the dykes due to the strength loss in the tailings and seepage pressures in the dykes due to the dissipation of porewater pressures following shaking. The placement of waste rock within a tailings impoundment to create inclusions of more rigid material could improve the seismic stability of tailings impoundments by providing reinforcement against deformation of the impoundment. Such inclusions can also help dissipate porewater pressures after shaking. The paper presents numerical analyses of a reference tailings impoundment, with and without waste rock inclusions, subjected to a seismic loading and an evaluation of the effects of the inclusions on the dynamic performance of the tailings impoundment.
The Use of Waste Rock Inclusions to Improve the Seismic Stability of Tailings Impoundments
James, M. (Autor:in) / Aubertin, M. (Autor:in)
GeoCongress 2012 ; 2012 ; Oakland, California, United States
GeoCongress 2012 ; 4166-4175
29.03.2012
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
The Use of Waste Rock Inclusions to Improve the Seismic Stability of Tailings Impoundments
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