Nutrient soil establishment and construction technology for ecological restoration of gangue dump

Abstract

The invention provides a nutrient soil establishment and construction technology for ecological restoration of a gangue dump. Nutrient soil is composed of soil removed from other places, pulverized fuel ash, organic matter, a decomposition agent, lignite and fertilizer and further comprises a PH conditioner; on the basis of defecting the nutrient components of the soil removed from other places, the application amount of fertilizer is calculated according to an improvement target which needs to be achieved; water is added to the materials according to a certain proportion, the mixed solution is sufficiently stirred, a spraying technology is adopted for spraying the mixed solution to the surface of a soil covering layer of the gangue dump, and a nutrient soil layer for vegetation growth isformed. According to the technology, on the basis of soil measurement, a determined soil improvement scheme is scientific and reasonable, and the plant nutrients are comprehensive and balanced; the effect can be quickly achieved, and the nutrients can also be slowly released; water retention and loosening can be achieved, mutual bonding is also achieved, quick formation of soil granules is promoted, and the influence of rain wash on the nutrient layer is reduced; the materials are simple, easy to purchase and low in cost.

Description

technical field [0001] The invention belongs to the technical field of land reclamation and ecological reconstruction, and in particular relates to a construction and construction technology of nutrient soil for waste rock ecological restoration. Background technique [0002] Coal gangue is the largest industrial solid waste discharged by coal mines, accounting for about 10-20% of raw coal production. At present, there are thousands of gangue dumps in the country that have not been treated, and about 500 million tons of gangue are added every year. Gangue dumps not only occupy a large amount of land and destroy the surrounding ecological landscape, but also release a large amount of toxic and harmful gases and dust into the atmosphere, as well as produce a large amount of shower liquid. Therefore, the ecological and environmental governance of gangue hills has a great responsibility and a arduous task. [0003] In waste rock treatment, covering the waste rock with soil and...

AI Technical Summary

Problems solved by technology

[0004] There are many technologies such as soil improvers, finishing agents, and repair agents used in other industries, but they are not suitable for the soil improvement of gangue hills. The main reasons are: first, the gangue hills have a large number of steep slopes and cannot be plowed; second, to prevent gangue from spontaneous combustion, It is necessary to use compacted loess for sealing and isolation, and plowing is prohibited, so the amendment cannot be applied; third, the soil nutrients in each area and each plot vary greatly, and it is difficult to achieve the expected effect only with a certain amendment; Fourth, the improvement agent has a short validity period and cannot provide long-term nutrients; fifth, it has high requirements for soil improvement. The soil should be loose and air-permeable, while preventing the loss of water, soil, and fertilizer; Seventh, it must be targeted, with different soil properties, different vegetation techniques, and different ratios

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