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Vegetation restoration structure of discarded metal mine and vegetation restoration method of discarded metal mine

A technology of vegetation restoration and waste metal, which is applied in the field of vegetation restoration and vegetation restoration structures, can solve the problems of high investment cost, temporary solution but not root cause, unsuitable mine contaminated soil restoration, etc., and achieves the effect of low maintenance cost and low cost

Active Publication Date: 2014-02-05
SOUTH CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the improvement agents for heavy metal-contaminated acid mine soil generally have the disadvantages of high initial or follow-up investment costs, only treating the symptoms but not the root cause, or not being able to virtuously circulate, so they are not suitable for the restoration of large-scale mine-contaminated soil.

Method used

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  • Vegetation restoration structure of discarded metal mine and vegetation restoration method of discarded metal mine
  • Vegetation restoration structure of discarded metal mine and vegetation restoration method of discarded metal mine

Examples

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specific Embodiment 1

[0037] Specific Example 1, Pilot Experiment of Vegetation Restoration in Abandoned Mine Dump Site

[0038] Restoration pilot experiment period: May to June 2013.

[0039] Restoration pilot site selection: No. 1 area on the east side of the pyrite dump in the Fandong mining area of ​​Dabaoshan, with a slope of 60o and an altitude of about 780 meters. The abandoned ore soil is immature soil, mainly stones and gravel, and the soil is heavily acidic ;

[0040] Soil acidity: pH value is 2.1-3.0

[0041] Vegetation restoration content: the slope of the dump site will be prepared to form 20 slightly inwardly inclined steps with a width of 2m and a length of 25m. The step distance is 1.5-2m. Build a drainage groove with a width of 25cm and a depth of 30cm on the inner side of each step, and the drainage groove shall be treated with mortar plastering. Build a vertical drainage ditch in the middle of the slope, with a width of about 1.5m and a depth of about 80cm, and the inner side...

specific Embodiment 2

[0047] Specific example 2, pilot experiment of vegetation restoration in abandoned mine dump

[0048] Restoration pilot experiment period: May to June 2013.

[0049] Restoration pilot site selection: Area No. 2 on the west side of the pyrite dump in the Fandong mining area of ​​Dabaoshan, with an altitude of about 780 meters and a slope of 60o. The abandoned ore soil is immature soil, mainly stones and gravel, and the soil is heavily acidic ;

[0050] Soil acidity: pH value is 2.1-3.0

[0051] Vegetation restoration content: the slope of the dump site will be prepared to form 16 slightly inwardly inclined steps with a width of 2m and a length of 25m. The step distance is 1.5-2m. Build a drainage groove with a width of 25cm and a depth of 30cm on the inner side of each step, and the drainage groove shall be treated with mortar plastering. Build a vertical drainage ditch in the middle of the slope, with a width of about 1.5m and a depth of about 80cm, and the inner side is s...

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Abstract

The invention discloses a vegetation restoration structure of a discarded metal mine. The vegetation restoration structure is in a shape of a stair. Each step comprises a lime layer, a straw layer, a soil replacement layer, a drainage channel and a soil blocking slope, wherein the lime layer is positioned at the bottom layer, and the thickness of the lime layer is 5-8cm; the straw layer is positioned on the lime layer; the soil replacement layer is positioned on the straw layer, serves as the main body layer and contains organic fertilizers and compound fertilizers; the drainage channel is positioned on the side close to the hillside; the soil blocking slope is positioned on the side far away from the hillside and formed by stacking soil replacement bags. The invention further discloses a vegetation restoration method of the discarded metal mine. The vegetation restoration method comprises the steps of finishing the mine slope of the discarded metal mine into the shape of the stair; building drainage ditches and channels; stacking the soil replacement bags; paving the lime layers, straws and soil displacement; planting trees resistant to acid and barren or pioneer herbaceous plants; and the like. According to the vegetation restoration method of the discarded metal mine, stream flows are effectively dredged to prevent acid water from polluting mine soil, oxygen consumption layer is established to effectively inhibit the oxidation of sulfide, therefore, soil acidity is reduced, polluted mine soil is repaired, and the effect of repairing the mine soil, restoring vegetation and greening and protecting the environment is achieved.

Description

technical field [0001] The invention relates to the field of ecological restoration of abandoned mines, in particular to a vegetation restoration structure used in abandoned metal mine fields and a corresponding vegetation restoration method. Background technique [0002] The pollution of heavy metals and acidic mine water caused by mining is an important issue of global concern. This is because many mines contain sulfides. These sulfides can generate sulfuric acid due to oxidation after contact with water and air due to mining activities, and its Oxidation continues, which makes the ore soil strongly acidic. Under strongly acidic conditions, the solubility and activity of many heavy metal elements such as aluminum, iron, manganese, copper, cadmium, zinc, etc. increase sharply, which causes an increase in their toxicity; while some nutrients cannot meet the requirements of plant growth due to the decrease in solubility. needs. This usually results in desolation of the surf...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01G1/00A01B79/02
Inventor 陈晓阳谢君马玲李永涛黄少伟郭彦彪王玉琪
Owner SOUTH CHINA AGRI UNIV
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