Abstract
AbstractThe large-strain consolidation behavior of a uranium tailings storage facility was investigated by analyzing survey data (bathymetric and topographic) from 1996 to 2008, laboratory testing of the mill tailings using a consolidation test system, and history matching of the deposited tailings using numerical modeling. The average cumulative consolidated height in the Deilmann Tailings Management Facility (DTMF) can be divided into four distinct stages: (1) rapid increase of 13 m/year from 1996 to 1999, (2) steady height increase of 2.5 m/year over the next 3 years, (3) relatively large height increase of approximately 7 m/year from 2002 to 2005, and (4) a steady height increase of 3 m/year over the next 3 years. During the large-strain consolidation test of the investigated mill tailings (σ′ of 0.3–8 kPa), the void ratio decreased from 5.8 to 3.3 and the solids content increased from 32 to 46%. The vertical hydraulic conductivity was found to range from 6×10−7 to 1×10−7 m/s. The numerical model...
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