Abstract
It was revealed that light loams of Kalahari group have subsidence properties on the territory at the concentrating mill. A numerical filtration model has been developed to predict the hydrodynamic regime of groundwater under the conditions of tailing dump exploitation during its heightening. An increase of groundwater levels at the area of the pumping station has been established when the flow is backed up by technical waters of the tailing dump during its filling. The calculation of compressible strata depth under buildings was carried out. The calculation of soil subsidence value at the base of pumping station foundations was carried out under the conditions of soil moisture increasing due to its wetting from below during groundwater rising. Reduction to acceptable values of foundations subsidence is provided by measures connected with lowering the groundwater level.
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