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Mine ecological restoration system and method

An ecological restoration and mine technology, applied in waterway systems, water conservancy projects, artificial waterways, etc., can solve problems such as polluted groundwater and environmental pollution, and achieve the effect of restoring the ecological environment, preventing environmental pollution, and avoiding continuous environmental pollution.

Inactive Publication Date: 2019-08-16
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the process of reclamation of waste rocks or tailings, regardless of the use of traditional foreign soil cover, or the restoration of vegetation after the original soil is improved, it is inevitable that the pollution existing in the restoration site will enter the river along with the surface runoff such as rainwater, polluting Part of the surface water seeps into the ground and pollutes the groundwater, especially in restoration sites where pyrite and other sulfide minerals are present. It is inevitable whether the pyrite and other sulfide minerals are covered with traditional alien soil or the original soil is improved for vegetation restoration. Oxygen and water are exposed to oxygen and water, resulting in oxidation reaction, producing acid mine wastewater, causing lasting environmental pollution

Method used

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  • Mine ecological restoration system and method

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Effect test

Embodiment 1

[0031] The isolation layer covering the area to be repaired in the mine is a geotechnical anti-seepage membrane with a thickness of 1.5mm. The isolation layer can isolate the mine to be repaired from contact with surface water or rainwater, and prevent the mine to be repaired from spreading pollution sources and polluting the surrounding environment.

[0032] The soil layer covered on the isolation layer is the soil suitable for the growth of local vegetation in the area to be restored, and the laying thickness is 10-60 cm.

[0033] A flood control ditch is provided around the bottom of the mine, and the bottom surface of the flood control ditch is lower than the contact surface between the waste rock or tailings and the original soil. The flood control ditch is used to isolate the mine to be repaired from the groundwater, so as to prevent the pollution source from the mine to be repaired from spreading and polluting the surrounding environment.

[0034] There is also a rainw...

Embodiment 2

[0037] The isolation layer covered on the area to be repaired in the mine is 60cm thick and the permeability coefficient is less than 1.0×10 -7 cm / s waterproof compacted clay. The isolation layer can isolate the mine to be repaired from contact with surface water or rainwater, and prevent the mine to be repaired from spreading pollution sources and polluting the surrounding environment.

[0038] The soil layer covered on the isolation layer is the soil suitable for the growth of local vegetation in the area to be restored, and the laying thickness is 10-60 cm.

[0039] A flood control ditch is provided around the bottom of the mine, and the bottom surface of the flood control ditch is lower than the contact surface between the waste rock or tailings and the original soil. The flood control ditch is used to isolate the mine to be repaired from the groundwater, so as to prevent the pollution source from the mine to be repaired from spreading and polluting the surrounding enviro...

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Abstract

The invention discloses a mine ecological restoration system and method. According to the mine ecological restoration system, by arranging isolation layers on a to-be-restored area of a mine, the situation that pollutants existing in a to-be-restored site enter a river along with surface runoff such as rainwater and consequently pollute surface water can be effectively eradicated, and meanwhile, parts of the pollutants can be prevented from permeating into the ground and then polluting underground water; a flood-prevention ditch is formed in the periphery of the bottom of the mine, and the situation that the pollutants existing in the to-be-restored site permeate into the ground along with the underground water and then pollute the underground water can be effectively eradicated; and a soil layer, a rainwater collecting layer and vegetation are arranged on the to-be-restored area to restore the ecological environment. According to the mine ecological restoration method, by restoring the to-be-restored area of the mine through the mine ecological restoration system, the ecological environment of a mine body is restored while continuous environmental pollution is avoided.

Description

technical field [0001] The invention relates to a mine ecological restoration system and an ecological restoration method, belonging to the field of ecological environment restoration. [0002] Background technique: [0003] Mineral mining and flotation sorting will produce a large number of fine particles of tailings stored in tailings pools or tailings piles. According to the China Environmental Statistics Annual Report, in 2015, my country produced 955 million tons of tailings, accounting for about 30.7% of the general industrial solid waste generated by enterprises. Metal pollutants contained in tailings ponds or tailings piles, especially sulfide minerals, are easy to react with oxygen and water vapor in the air, resulting in weathering, and are easily formed by acid mine wastewater (AMD) through the leaching of rainwater. Acid mine wastewater (AMD) is rich in sulfate ions, ferrous ions and other metal ions and anions. If not properly treated, it is easy to enter surface...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D3/00E02D31/00E02B5/00E03F1/00
CPCE02B5/00E02D3/00E02D31/004E03F1/002
Inventor 汪顺才
Owner HOHAI UNIV
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