The Analysis Of Dam's Stabilization And Seepage Of Phosphogypsum Still In BaiJi

According to Checking engineering geology and hydrology geology data of phosphogypsum still in MaChangPing, we understand some characters about the weather, hydrology, geography, geologic strata rock, the structure of earthquake, the condition of hydrology geology etc. And analyze its seepage status.Along with use phosphogypsum still, the elevation is arrived at 930⁹33m. The height of packing is 933m. The osmotic stability of stacking is in direct contact with using in packing and circulating safely.Accord i ng to American Andman company of 《the illustration to explore with sampling in phosphogypsum still, Wengfu》 , We get the hydraulic conductivity of packing strata and phosphogypsum while we are exploring and sampling. At last, we find the hydraulic conductivity is 1. 8-3.5×10^-4cm/s (the label is to be called K) through the exami nat i on wi th pumping and water flooding.And then, we also adopted the software of visual modflow, and simulated lots of complexions including flow field of phosphogypsum sti11 under the six operating modes. These complexions were used to value analysis of leakage stability about the phosphogypsura dam. The result of seepage face are 891. 4m , 890.1m, 898.7m, 895.6m, 903.3m, 900. 5m when the elevation of the phosphogypsum still are 940m, 950m, 960m and the dry cell are 0 and 100 m. In that case, primary dam's elevation of water head is less than 910. 98 m which is the elevation of primary dam. And the most biggest gradient ratio of seepage which are 0. 554, 0.263, 0.427, 0.247, 0.378, 0.238 is also less than gradient ratio of waterpower that is allowed(0. 71) . In this packing, phosphogypsum dam is very safe.