Treatment method for recovering mine wasteland vegetation

Abstract

The invention is applicable to the field of ecological remediation and provides a treatment method for recovering mine wasteland vegetation. The method comprises the following steps of preparing an improved suspension liquid; spraying the improved suspension liquid; performing permeation improvement; spraying and seeding soil dressing substrate and recovering vegetation. According to the treatment method, the improved suspension liquid is prepared and sprayed on the surface of a mine wasteland, and permeates and diffuses toward the deep layer of the mine wasteland by utilizing the gravity permeation effect of the improved suspension liquid, so that the purpose of deep permeation improvement is achieved, and thus acidic and heavy metal ions which are likely to be reversely permeated in the deep layer of the mine wasteland are prevented from being reversely permeated to the surface layer of the mine wasteland due to the soil capillary action; and on the basis of an improved soil layer, a vegetation layer is reestablished, grass and shrub plant seeds are sprayed and seeded, so that the purposes of realizing vegetation recovery and conserving water and soil are realized.

Description

technical field [0001] The invention belongs to the field of ecological restoration, in particular to a treatment method for vegetation restoration of abandoned mine land. Background technique [0002] With the development of mineral resources, especially the unreasonable development and utilization, serious ecological problems have been caused. These problems have seriously affected the ecological security of the country and directly threatened the production and life of the people in the mining areas. In the mining or mining area and a large amount of solid waste, the heavy metal content is too high. The solid waste residue of the mine is washed and leached by rainwater, and the toxic and harmful components in it are easily infiltrated into the soil, causing soil acidification, and it is concealed and long-term. , leading to soil environment deterioration, vegetation degradation, and biodiversity imbalance. Because many abandoned metal mines contain a large amount of sulf...

AI Technical Summary

Problems solved by technology

[0003] At present, there are few methods for rebuilding a good environment in acidic and heavy metal-contaminated mines, either by simply spreading lime or by covering with 0.5-1m of nutrient soil.

It is difficult to quickly neutralize the acidity of the deep layer of the mine and solidify the heavy metal ions by using a single lime method, and it cannot prevent the oxidation and re-acidification of sulfur minerals, and it will also increase the degree of re-acidification of the soil

However, a large area of ​​covering soil requires a large amount of nutrient soil, and the cost is high, so it is difficult to apply to the vegetation restoration problem of a large area of ​​mine abandoned land caused by historical reasons in my country's mineral mining.

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