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Composite layer, method for controlling acidization of mining slag heap yard and revegetation method

A composite layer and soil yard technology, applied in the field of composite layer and vegetation reconstruction, can solve the problems such as the inability to prevent the oxidation and re-acidification of sulfur minerals, the difficulty in solving the pollution of the mining area and the environment, and the difficulty in borrowing soil, so as to avoid vegetation degradation, The effect of improving the environment and maintaining soil and water

Active Publication Date: 2015-04-08
深圳市如茵生态环境建设有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A single lime spread is difficult to neutralize the acidic solution of continuous reverse osmosis in the lower layer, and cannot prevent the further oxidation and re-acidification of sulfur minerals; a large area of ​​thick layer of soil requires a large amount of soil topsoil, and it is difficult to obtain soil in mining areas, and the cost is high. Solve pollution and environmental problems on the mine surface

Method used

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  • Composite layer, method for controlling acidization of mining slag heap yard and revegetation method
  • Composite layer, method for controlling acidization of mining slag heap yard and revegetation method
  • Composite layer, method for controlling acidization of mining slag heap yard and revegetation method

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Embodiment 1

[0068] Take the exposed polluted slope in the ecological restoration of a copper mine slag dump in Jiangxi as an example.

[0069] The polluted side slope of the mine muck yard is 30m high, the slope is 55°, and the treatment area is 2000m 2 . The slope surface is bare with no vegetation growing. The surface and lower layers of the slope contain a large amount of sulfide and sulfur-copper minerals, and the surface muck contains a variety of heavy metals, including Pb, Cu, Zn, Cr, etc. Due to the long-term exposure, under the joint action of oxidation and precipitation, the soil is severely acidified and heavy metals are lost, and the soil pH value is between 3.5 and 4.5.

[0070] Adopt the method of the present invention to carry out acid resistance control and vegetation rebuilding to this place, concrete process is as follows:

[0071] 1. Build intercepting ditches at the top of the slope, and build drainage ditches on both sides and at the bottom of the slope to prevent ...

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Abstract

The invention provides a composite layer. The composite layer is used for controlling acidization of a mining slag heap yard and comprises a flow guiding layer, a first nonwoven fabric layer, a sand and stone layer, a second nonwoven fabric layer and an isolation layer which are arranged in sequence. The invention further provides a method for controlling the acidization caused by the mining slag heap yard and a revegetation method of the mining slag heap. By establishing a buffer isolation zone between a mining slag heap yard acidization surface and a plantation layer, the acid water containing a variety of heavy metal ions can be blocked and isolated, sulphur minerals in the lower layer can be effectively prevented from being further oxidized and acidified, the acid liquor in the lower layer can be prevented from permeating reversely into the upper layer so as not to pollute the plantation layer and poison plants under the action of soil capillaries. By reconstructing the plantation layer on the composite layer, a long-term stable fit environment can be created for the growth and development of plants, the vegetation degradation can be avoided, and the purposes of ecological remediation, environmental improvement and soil and water conservation can be achieved.

Description

technical field [0001] The invention belongs to the technical field of ecological restoration, and in particular relates to a composite layer, a method for acid resistance control of a mine dregs storage yard, and a vegetation reconstruction method. Background technique [0002] The open-pit mining of metal mines poses a threat to the environment of the mining area, especially the muck that is stripped from the veins and transported during mining is piled up like a mountain, forming a huge muck dump. Because the stockyard contains a large amount of sulfide and paragenetic ore, it has been exposed for a long time, and under the joint action of air and rainwater, the sulfur minerals are oxidized and the soil is acidified. The way of flow and reverse osmosis invades the surface, leading to further acidification of the surface layer and the loss of heavy metals, causing heavy metal pollution to pollute the surrounding environment and deteriorating the soil environment. At prese...

Claims

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Application Information

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IPC IPC(8): B09C1/00
Inventor 章梦涛李东樵黄真劲詹健潘荣森黄武生陈振峰陈增香
Owner 深圳市如茵生态环境建设有限公司
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