Slope, pit bottom and foundation bottom seepage preventing method based on tailings composite anti-seepage material

Abstract

The invention discloses a slope, pit bottom and foundation bottom seepage preventing method based on a tailings composite anti-seepage material. The used tailings composite anti-seepage material comprises, by mass percentage, 3.3-4.8% of stabilizer, 3.3-4.8% of wetting agent, 10.0-15.2% of sodium silicate, 10.0-15.2% of cement and 60.0-73.0% of tailings slurry, wherein the stabilizer is the mixture of calcium chloride and sodium borate tetrahydrate, The method includes: preparing and mixing the anti-seepage material, processing a to-be-sprayed face, conveying the mixed anti-seepage material, spraying the mixed anti-seepage material, and inspecting spraying quality. The method has the advantages that an anti-seepage material layer finally formed by the method is extremely low in permeability, the permeability of the anti-seepage material layer is only 1 / 1000 of that of high-quality clay, the permeability coefficient k of the anti-seepage material layer can reach 1*10<-9>, and the anti-seepage material layer is good in acid resistance and base resistance, high in stability, high in concretion strength and resistant to erosion.

Description

technical field [0001] The invention relates to an anti-seepage method for slopes, pit bottoms, and bases, in particular to an abandoned open-pit mining pit, valley-shaped, mountain-shaped tailings ponds, and landfills and other solid waste disposal sites. Anti-seepage treatment methods for slopes, pit bottoms, and bases. Background technique [0002] After decades of mining in my country's mines, a large number of open pits and underground empty areas have been left. Surface pits and underground voids often go hand in hand. With the scarcity of land resources and the reduction of various waste storage and disposal sites, more and more open-pit pits are used. Therefore, the seepage caused by waste piled in open-pit pits is harmful to underground goafs. come from. [0003] Domestic tailings disposal mainly includes tailings stacking and filling goaf. Among them, tailings stacking is a way to dispose of the largest amount of tailings. Due to the presence of water and a smal...

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Problems solved by technology

It has high requirements on the permeability coefficient, liquid limit, plasticity and PH value of clay, and the effect is poor

②Bentonite anti-seepage layer: This anti-seepage layer is a terrain with poor geological conditions. A certain proportion of bentonite is added to the clay to adapt to the terrain with poor geological conditions. It not only has certain requirements for clay, but also has a wide range of applications. Small

③ High-density polyethylene (HDPE) anti-seepage layer: it is mainly in the form of "two cloths and one film" in the project, that is, geotextile + HDPE film + geotextile to pave the anti-seepage layer. The surface is smooth, otherwise the anti-seepage effect is poor and the cost is high

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