Method for ecological slope protection of abandoned mine waste dump

Abstract

The invention provides a method for ecological slope protection of an abandoned mine waste dump. The method comprises the steps of slope surface arrangement, base layer construction, film paving and net hanging spray-seeding. A spray-seeding matrix is mainly prepared from following raw materials including 100 parts of countryside soil, 20 parts of plant ash, 10 parts of humic acid, 8 parts of sawdust, 50 parts of drying sludge, 5 parts of cement and 2 parts of plant fibers. According to the method, bituminous concrete is paved on the slope surface, sinking of loosen soil in a side slope is weakened, and the strength of a rock-soil body of the slope surface is improved; by means of multiple layers of waterproof barriers, rainwater permeation is effectively stopped, meanwhile, a large quantity of tailings, waste stone and urban sludge can be consumed, and the region ecological environment is improved; and the engineering cost is low, and good social benefits and economic benefits are achieved.

Description

technical field [0001] The invention relates to the technical field of slope protection for mine dumps, in particular to an ecological slope protection method for abandoned mine dumps. Background technique [0002] According to incomplete statistics, as of 2016, the number of abandoned mines in my country exceeded 12,000, and the stockpiled stripped objects exceeded 12 billion tons. Due to various reasons, the dumps formed by these stripped objects were not completely piled up according to the design requirements. On the one hand, it occupies a large amount of land, destroying the ecological environment and further deepening the desertification phenomenon; on the other hand, with the erosion of rainwater throughout the year, many natural disasters such as soil erosion and mudslides have occurred. Although there are many technologies for slope reforestation, including hanging net spraying technology, fish scale pit excavation technology, planting trough technology, etc., most ...

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Problems solved by technology

[0002] According to incomplete statistics, as of 2016, the number of abandoned mines in my country exceeded 12,000, and the stockpiled stripped objects exceeded 12 billion tons. Due to various reasons, the dumps formed by these stripped objects were not completely piled up according to the design requirements. On the one hand, it occupies a large amount of land, destroying the ecological environment and further deepening the desertification phenomenon; on the other hand, with the erosion of rainwater throughout the year, it has caused many natural disasters such as soil erosion and mudslides.

Although there are many technologies for slope reforestation, including hanging net spraying technology, fish scale pit excavation technology, planting trough technology, etc., most of them are suitable for rocky slopes, but not completely suitable for dump site slopes. The slope of the dump site formed by the accumulation of loose materials does not have the ability to prevent the erosion of rainwater. When rainfall occurs, the rainwater will wash the surface of the slope and destroy the shape of the slope body. At the same time, it will also penetrate into the interior of the slope and jointly destroy the dump site The overall stability of the slope will lead to the occurrence of geological disasters and accidents, which will eventually lead to the failure of the slope restoration project

Moreover, the existing technology does not combine the status quo of abandoned mines to make full use of other resources in abandoned mines, thereby reducing the cost of the project

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