Location

San Diego, California

Session Start Date

5-24-2010

Session End Date

5-29-2010

Abstract

The Geita gold mine, owned by AngloGold Ashanti, is located in the north west of Tanzania on the African Rift Belt in a seismically active. It is also located in an environmentally sensitive area as it is directly upslope of Lake Victoria. The Tailings Storage Facility was constructed as a side valley dam with its maximum design embankment elevation 1216m (i.e. 35m above ground level) and store capacity approximately 60 million tons of tailings. The feasibility of increasing this wall ultimately to 1246m (i.e. 65m above ground level) thereby increasing its capacity by 88.5 million tons, is the topic of this submission. The static liquefaction potential of the tailings was evaluated using an array of field and laboratory tests. It was found that the majority of the tailings displayed contractive behaviour, implying that should a failure of the outer wall occur a liquefaction type failure could result. The stability of the facility for the current and future raised geometries was investigated under static and dynamic loading conditions. Feasible solutions were evaluated in terms of their appropriateness. A viable solution using material readily available at this remote site was found and is currently under construction.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conferences on Recent Advances in Geotechnical Earthquake Engineering and Soil Dynamics

Meeting Name

Fifth Conference

Publisher

Missouri University of Science and Technology

Publication Date

5-24-2010

Document Version

Final Version

Rights

© 2010 Missouri University of Science and Technology, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

Share

COinS
 
May 24th, 12:00 AM May 29th, 12:00 AM

Seismic Stability Assessment the Raising of the Geita Tailings Storage Facility, Tanzania

San Diego, California

The Geita gold mine, owned by AngloGold Ashanti, is located in the north west of Tanzania on the African Rift Belt in a seismically active. It is also located in an environmentally sensitive area as it is directly upslope of Lake Victoria. The Tailings Storage Facility was constructed as a side valley dam with its maximum design embankment elevation 1216m (i.e. 35m above ground level) and store capacity approximately 60 million tons of tailings. The feasibility of increasing this wall ultimately to 1246m (i.e. 65m above ground level) thereby increasing its capacity by 88.5 million tons, is the topic of this submission. The static liquefaction potential of the tailings was evaluated using an array of field and laboratory tests. It was found that the majority of the tailings displayed contractive behaviour, implying that should a failure of the outer wall occur a liquefaction type failure could result. The stability of the facility for the current and future raised geometries was investigated under static and dynamic loading conditions. Feasible solutions were evaluated in terms of their appropriateness. A viable solution using material readily available at this remote site was found and is currently under construction.