Session Start Date

6-1-1988

Abstract

This paper discusses the geotechnical investigation of a large gold tailings facility which has been in operation since December 1977. The very thorough test program included 670 m (2200 ft.) of piezocone probing, 65 self-boring pressuremeter tests down to a maximum of 35 m (118 ft.), 60 SPT's and 9 laboratory triaxial tests as well as a well pump test. The study included a detailed geological and seismic study to determine earthquake design parameters and to assess the liquefaction potential of the deposit. Test results were utilized to determine the stability of an upstream constructed embankment employing the sub-aerial method of tailings deposition together with a comprehensive underdrainage system. The study indicates that liquefaction of the deposit is highly unlikely to occur and that the embankment has an acceptable factor of safety under sub-aerial conditions.

Department(s)

Civil, Architectural and Environmental Engineering

Appears In

International Conference on Case Histories in Geotechnical Engineering

Meeting Name

Second Conference

Publisher

University of Missouri--Rolla

Publication Date

6-1-1988

Document Version

Final Version

Rights

© 1988 University of Missouri--Rolla, All rights reserved.

Document Type

Article - Conference proceedings

File Type

text

Language

English

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Jun 1st, 12:00 AM

Testing of the Homestake Mine Tailings Deposit

This paper discusses the geotechnical investigation of a large gold tailings facility which has been in operation since December 1977. The very thorough test program included 670 m (2200 ft.) of piezocone probing, 65 self-boring pressuremeter tests down to a maximum of 35 m (118 ft.), 60 SPT's and 9 laboratory triaxial tests as well as a well pump test. The study included a detailed geological and seismic study to determine earthquake design parameters and to assess the liquefaction potential of the deposit. Test results were utilized to determine the stability of an upstream constructed embankment employing the sub-aerial method of tailings deposition together with a comprehensive underdrainage system. The study indicates that liquefaction of the deposit is highly unlikely to occur and that the embankment has an acceptable factor of safety under sub-aerial conditions.