Uranium tailing pond dam break three-dimensional numerical simulation method based on computational fluid mechanics

Abstract

The invention discloses a uranium tailing pond dam break three-dimensional numerical simulation method based on computational fluid mechanics, and belongs to the field of uranium tailing pond safety.The method comprises the following steps: collecting basic data of a uranium tailing pond, and establishing three-dimensional models of a reservoir area, a dam body and a river within a certain downstream range of the uranium tailing pond by utilizing three-dimensional modeling software; dividing grids of the three-dimensional model according to regions, and determining boundary conditions of thetop of the uranium tailing pond and a downstream river channel; selecting a numerical simulation solving method; comparing a numerical simulation result with a model test result, verifying, calibrating, and optimizing the numerical model; drawing up a calculation scheme, and calculating dam break influence consequences of different dam break types by adopting the optimized three-dimensional numerical model; and analyzing the reliability and reasonability of a calculation result, and giving related data of a flow field, debris flow depth, flow and flow velocity change process of a calculation region. Three-dimensional numerical simulation is applied to uranium tailing pond dam break research, the method is low in cost, short in period and high in simulation precision, and the influence of uranium tailing pond dam break can be visually checked.

Description

technical field [0001] The invention relates to the technical field of uranium tailings pond safety, in particular to a three-dimensional numerical simulation method for uranium tailings pond dam break based on computational fluid dynamics. Background technique [0002] There is a large amount of uncompacted tailings sand and clarified water stored in the uranium tailings pond, which makes the tailings dam seepage line higher, and dam failure accidents may occur when heavy rainstorms and floods are encountered. Compared with uranium tailings ponds in other industries, uranium tailings ponds are a large source of radioactive radiation pollution formed by storing a large amount of uranium tailings. Once a dam failure occurs, a large amount of radioactive tailings will be lost from the pond, which will cause radiation pollution to the downstream environment. , seriously endangering the downstream ecological environment and public health. [0003] The commonly used research met...

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Problems solved by technology

The theoretical formula method is simple in form, mainly suitable for two-dimensional calculation, and often has a large error with the actual situation; the model test has been tested in practice and has a high degree of accuracy, but the cost of the model test is high, the test period is long, and due to the reduction The scale effect exists, and for many engineering concerns, model tests cannot be used to accurately study

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