A Proposal to Standardize Vulnerability Analyses of Flow Liquefaction of Tailings Dams

La Serena, Chile
Thursday, November 14, 2024, 11:00 AM - 12:30 PM
Panamgeo2024
null


星期四, 十一月 14, 2024
11:00 上午 - 12:30 下午

Abstract

This paper proposes a procedure for standardizing the assessment of the vulnerability of tailings dams to flow liquefaction using numerical methods. 

The procedure consists of five steps: i) simulating the behavior of tailings and strain-softening materials with a constitutive model able to capture liquefaction and strain softening; ii) calibrating the model to reproduce the expected peak and residual undrained strength ratios, and brittleness; iii) simulating the construction and operation of the dam as a coupled flowdeformation analyses; iv) applying a set of standard triggers that disturb the balance of the dam, as “undrained” actions, and increasing them monotonically until failure is observed; and v) reporting the outcome. 

Three disturbing actions are recommended, that represent ultimate states of the dam and that cover most of the known causes of tailings dam failure: i) an increase in the phreatic surface; ii) a toe contraction; and iii) a load at the crest. 

The vulnerability of the dam is evaluated by analyzing if one or more of the failure modes: i) produces loss of containment; ii) involves brittle or progressive failure; iii) has a trigger value within the plausible range for the dam.

Date: Thursday, November 14, 11:00 - 12:30, Andes 2 Room, Tailings 1, Section 461

Click here to see other SRK presentations at this event.

 

演讲人

Alejo Oscar Sfriso | Geotechnical Mining Engineer, Director | SRK Argentina

Alejo Sfriso

Group Chair, Corporate Consultant (Geotechnical Engineering)

Alejo is expert in the application of numerical methods to the design, analysis and risk evaluation of geotechnical structures, with emphasis in construction procedures.

与我联系