Abstract
In this paper, the Guangxi’s red mud disposal field is taken as the study area. Appropriate calculating parameters and boundary conditions were selected based on the survey data to build a Mohr-Coul0mb and fluid model under the plane-strain condition. FLAC software was adopted to simulate the distribution of pore water pressure, filtrate seepage paths, and leakage of the dam body under conditions with no anti-seepage design, with partial anti-seepage design and with full anti-seepage design respectively, which provided a technical base for the anti-seepage design of this tailing reservoir. The results showed that this software could better simulate the leakage of red mud tailing dams. The reservoir area displayed obvious leakage characteristics, so full anti-seepage measures and appropriate seepage-proofing materials should be employed to deal with the dam body and the reservoir area to prevent environmental pollution and guarantee the stability of the tailing dams. The method not also can provide the technical reference for the evaluation of anti-seepage works, but also gives important guidance for the anti-seepage works.
Highlights
Red mud storage area is a place of stockpiling red mud in mining engineering
The Open Civil Engineering Journal, 2015, Volume 9 401 and seepage characteristics of the tailing dam was simulated with software [3-5]
The results show that exchange degree of red mud filtrate with surrounding groundwater environment is related to the comprehensive anti-seepage effect, when taking closed antiseepage measures
Summary
Red mud storage area is a place of stockpiling red mud in mining engineering. Red mud is the high alkaline tailings from the production process of alumina, the tailing dam of red mud has adverse environmental impacts and groundwater can be polluted. Leakage is the engineering geological problem which is often met and must be solved, when tailing pond is built in the karst area. The groundwater will be polluted by means of slag and wastewater and the poor stability of the dam body can be produced if the problem of karst seepage happens. It is necessary to analyze the characteristics of the tailings dam seepage and take efficient actions to prevent seepage and cure them [1]. The stability and the characteristics of seepage of tailing reservoirs are studied on numerical simulation technology which can comprehensive and deep analysis the characteristics of seepage [2]. The leakage of tailings dam can be simulated with FLAC3D software, it is significant to fully recognize the character of the flow, analysis and simulate pore water pressure and the path of flow, to research and work out the control measure of the tailings dam leakage
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