Tailing pond pollution control flow guide and seepage prevention method

Abstract

The invention discloses a tailing pond pollution control flow guide anti-seepage method which comprises the following steps: firstly, determining a tailing pond bottom bedrock breaking development area and a damaged area of a natural or artificial material anti-seepage layer, and carrying out grouting anti-seepage reinforcement treatment on the damaged area; calculating a precipitation radius and a dominant channel according to the permeability coefficient of each stratum in the tailing pond area, and arranging a peripheral vertical diversion well array on the periphery of the tailing pond; and transverse flow guide holes are formed in the sealed slag heap for drainage, so that the water content of the slag heap in the warehouse can be reduced, and the oxidation, dissolution, release and diffusion migration rates of pollutants are reduced. The method is suitable for the tailing pond with the pollutant migration and diffusion problem, grouting seepage prevention is conducted after a damaged area is found out, then the vertical diversion well array around the tailing pond is constructed to conduct diversion on peripheral underground water, the underground water penetrates through the water-resisting layer to be directly drained to a deep underground water channel, and meanwhile the ground surface drainage prevention measure and the bottom seepage prevention measure of the tailing pond are combined. External shallow underground water can be effectively isolated, and interaction between peripheral underground water and the interior of the tailing pond is greatly reduced.

Description

technical field [0001] The invention relates to the pollution prevention and seepage prevention technology of tailings ponds, in particular to a method for diversion and anti-seepage of pollution control of tailings ponds. Background technique [0002] Tailings ponds are an important part of the normal operation of mines. By the end of 2012, there were 12,273 tailings ponds nationwide. The pollution control of tailings ponds has always been highly valued by countries all over the world. The bottom of the early Class I tailings ponds in China has almost no anti-seepage requirements, and only Class II tailings ponds require the anti-seepage layer to reach a permeability coefficient of 1.0*10 -7 The clay layer with a thickness of 1.5m in cm / s has a considerable anti-seepage effect (refer to the national standard GB 18599), so some early-built tailings stocks have more environmental pollution problems. Tailings pond pollution Tailings pond pollution has the characteristics of ...

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Problems solved by technology

[0004] In order to overcome the above-mentioned technical problems, the present invention provides a tailings pond pollution control diversion and anti-seepage method, aiming at tailings ponds where pollutant migration and diffusion problems occur, it is determined through comprehensive geological surveys that the bedrock at the bottom of the tailings pond is broken and developed areas, natural or artificial material anti-seepage layer damaged areas, grouting anti-seepage reinforcement treatment for the bedrock broken development area and anti-seepage layer damaged area, and at the same time build vertical diversion well arrays around the tailings pond to divert the peripheral groundwater , pass through the relative aquifer and directly meet the deep groundwater channel. At the same time, horizontal diversion holes are set inside the slag pile to drain water, reduce the water content of the slag pile in the reservoir, and reduce the oxidation, dissolution, release and diffusion migration rate of pollutants.

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