Go to  Advanced Search

Slope stability model of the Questa rock pile : phase 2

Show full item record

Files in this item

Files Size Format Description   View
Fredlund_M_2_et_al_TMW_2011.pdf 261.9Kb Adobe Portable Document Format   View/Open
Title: Slope stability model of the Questa rock pile : phase 2
Author: Fredlund, Murray; Lu, Haihua; Feng, Tiequn
Issue Date: 2011-11
Publicly Available in cIRcle 2011-11-04
Series/Report no. Tailings and Mine Waste 2011: Vancouver, Canada
Abstract: A slope stability analysis was performed for the mine rock pile located at Molycorp’s Questa Mine. The goal of this task is to provide a sensitivity analysis with respect to the influence of various input parameters on the slope stability model. The influence of a change in soil shear strength parameters as influenced by weathering factors was also investigated. A particular focus of the study is the examination of potential thin weak layers and their impact on the stability analysis. The weathering aspects of these weak layers and the resulting influence on stability will be determined through a sensitivity analysis. The 2D forward analysis for the Goat Hill North detailed conceptual model results in a peak shear strength factor of safety of approximately 1.4 and a large deformation shear strength factor of safety equal to 1.18. The probability of failure of a conceptual model similar to the Goat Hill North conceptual model displays a probability of failure greater than 4% only if the overall slope angle exceeds 37.5 degrees and the large deformation shear strength values are used in the model. For a weak layer to cause failure conditions the effective shear strength of the layer would have to drop to approximately 20-23 degrees. [All papers were considered for technical and language appropriateness by the organizing committee.]
Affiliation: Non UBC
URI: http://hdl.handle.net/2429/38768
Peer Review Status: Unreviewed
Scholarly Level: Other

This item appears in the following Collection(s)

Show full item record

All items in cIRcle are protected by copyright, with all rights reserved.

UBC Library
1961 East Mall
Vancouver, B.C.
Canada V6T 1Z1
Tel: 604-822-6375
Fax: 604-822-3893