The Model Of Coupled Seepage And Stress Fields And It's Application In Tailings Dam Engineering

The analysis of coupled seepage and stress fields is an important research direction of geotechnical engineering. The seepage and stress fields are interaction in rocks. It's very essential to discuss and research the coupled seepage and stress fields in a system.Tailings dam is an important mine facilites. There is a large mount of tailings and water in tailings dam. It will cause the inestimable losses to the production and people's life and property if the tailings dam breaks. The seepage is an important factor for dam stability. So the analysis of coupled seepage and stress fields is a significant topic for the engineers.This article first analyzes the interaction mechanism of seepage and stress fields for the geotechnical medium, and establishes the coupling physical model; then take the mathematics and FEM as the tools, derivates the FEM computing formula follow the Galerkin method for the coupling fields, and gains the difference schemes of FEM computing formula, namely the explicit difference scheme, implicit difference scheme and the central difference scheme. This article also explains how to determine the saturation line and the position of the initial water line, and how to choose the convergence yardstick. In view of the characteristics of tailings dam, this article research the different pile of dam form, the characteristics and orderliness and the destroy forms of dam.This article simulates and computes the coupling field of seepage and stress of Jin Duicheng Lixi tailings dam using the commercial software GEO-SLOPE. This article simulates the single seepage field, the single stress field and the coupling field, and analyses the results. The article simulates and analyses the influence of the three factors for the position of saturation line: the length of dry beach, the precipitation and the anisotropy of the medium. From the results, we can get some conclusions: (1) in appropriate range, if the length of dry beach increases 100m, the seepage quantity will reduce about 14%, therefore we should increase the length of dry beach as far as possible in order to keep the stability of the tailing dam; (2) if the rise of water line is not considered, the seepage quantity will be no large variety in different precipitation conditions; (3) the seepage quantity of the dam increases gradually with the increase of K_y/K_x...