Author(s)

H. Klapperich, U. Gross, R. Hahne, T. Richter & S. Savidis

Abstract

Seismic stability of tailing dams for the uranium industry H. Klapperich", U. Gross*, R. Hahne', T. Richter^, S. Savidis^ "DMT-Geotechnical Institute, 4300 Essen, Germany *DMT-Geotechnical Institute, 7030 Leipzig, Germany ^ Wismut GmbH, Chemnitz, Germany *GuD Consult GmbH, 1000 Berlin, Germany ABSTRACT Wastes of uranium mining in the former East Germany were disposed in old openpit mines and valleys,which are bordered with rockfill dams. The soil material in these tailings have grain sizes from clay to middle sand. Resulting from partially high water contents the soil material have thixotropical conditions. Long-term protection of these tailings required a dam-stability design due to seismic loading. The ground is formed by metamorphic clay shales or middle-strong sand- and claystones. An analysis of regional seismicity showed value for the seismic site intensity from 7 to 8 degrees at MSK-scale. The computation of the dynamic stresses and str

Keywords