| The metal mine and the nonmetal mine are high risk industry in industrial production. The number of accidents and deaths is very large in the field of industrial safety production. Tails facilities is that the important component of mine produces the facilities, tailing dams safe operation directly relates to lower reaches of a river people's life and wealth safety and the locality ecological environment. Making sure the safety of tailing dam has become a tailing dam safety work in one of the important tasks. Therefore, the tailings project is not only of academic value, but also has economic and social benefits.Tailing is complicated porous material made up of three phases, solid, liquid (water), and gas, whose states and interactions have important influences on the physicochemical properties and strengths of the tailing. Among them, the uppermost interaction happens between water and solid. The paper studies the water-soil interaction between the tailing particles, and introducing the theory of water-soil interaction into the tailing dam stability analysis, the interaction is classified into four types, water-soil physical interaction, water-soil chemical interaction, seepage action, and the modals of physical, chemical and seepage coupling action, then introduces the types, characteristics and the control factors of their respective action. As for the dam stability, according to seepage action of water-soil interaction, we can analysis the stability of tailing dam with the finite element method, and also establish the finite element mathematical model. The mathematical model will benefit to the stability analysis in water-soil interaction.Heshanggu tailing dam is a typical upstream dam, the author collects the relevant data of terrain, geology and hydrology, the relevant parameters of permeability coefficient, bulk density, cohesion, friction angel, void ratio and so on, and then proposes the problem of tailing suction under the condition of water-soil interaction. Safety factor of the tailing dam could be caculated by the finite element mathematical model. At the same time, verified the model with the Li Zheng geotechnical analysis software. Results of them proved the reliability of the model.In summary, the theoretical analysis made water-soil interactional mechanism combined with stability analysis of tailing dam. Beneficial discussions on the aspect of water-soil interaction, and provide a new train of thought on disaster-causing mechanism of the tailing dam. The systemic research is of great reference value to the perfect coupling analysis of structure safety and environment stability in tailing dam, and is of great theoretical significance and practical value to development of dam design and hazard control. |
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