Ecological restoration method for metal mine extremely-acidified waste dump

A technology for ecological restoration and dumping sites, applied in the restoration of polluted soil, land preparation methods, and agricultural gas emission reduction, can solve problems such as loss of manpower and material costs, unreasonable selection of plant varieties, and long time-consuming improvement and ripening. Achieve the effect of convenient construction and operation, extreme acidification of soil environment and improvement of soil erosion phenomenon, and prevention of soil erosion

Active Publication Date: 2021-12-07
CHINA ENFI ENGINEERING CORPORATION
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Problems solved by technology

[0006] In view of the above problems, the purpose of the present invention is to provide a method for ecological restoration of extremely acidified dumps in metal mines, so as to solve the problems of slow vegetation establishment, unreasonable selection of plant varieties, and poor stability in current ecological restoration methods for dumps in metal mines. , easy to degrade and soil acidification, improvement and ripening takes a long time, and it is easy to cause a lot of manpower and material cost losses, etc.

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  • Ecological restoration method for metal mine extremely-acidified waste dump

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preparation example Construction

[0064] As a preferred version of the present invention, the preparation method of biological bacteria organic fertilizer comprises:

[0065] 40-60 parts of animal manure, 20-50 parts of rice husk, and 10-15 parts of active probiotic microorganisms are evenly mixed and fermented to prepare bio-organic fertilizer; and / or, the amount of bio-organic fertilizer applied 5.0~7.5kg / m 2 .

[0066] Specifically, animal manure can be selected from poultry manure, such as chicken manure, duck manure, etc., or livestock manure, such as cow manure, horse manure, etc. The bio-bacteria organic material mixed according to the above ratio is fermented and decomposed to obtain the bio-bacteria organic fertilizer. By applying the bio-bacteria organic fertilizer, the nutrient content of the soil can be increased and the structure of the microbial community can be improved.

[0067] As a preferred solution of the present invention, the method of the present invention also includes: the heavy meta...

Embodiment 1

[0084] The Dabaoshan mining area is a large-scale polymetallic mine dominated by iron and copper. The upper part of the polymetallic deposit is a weathered and leached limonite deposit, the middle part is a layered siderite deposit, and the lower part is a copper, lead, zinc and pyrite deposit. And porphyry-type molybdenum deposits and skarn-type molybdenum-polymetallic deposits. Most of the Xinshan area has no vegetation coverage, and it is bare soil, with serious soil erosion. The dumps and open pits formed by the abandoned land left over from history contain pollutants such as sulfur and heavy metals. Under precipitation conditions, sulfur is easily oxidized and produces acidic water. , leading to the continuous dissolution of heavy metals, which is the main source of acidic wastewater discharged from the Dabaoshan mining area, causing serious pollution to the water quality of the downstream Hengshi water and farmland soil.

[0085] The extremely acidic dump site is located...

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Abstract

The invention provides an ecological restoration method for a metal mine extremely-acidified waste dump, which comprises the following steps that a side slope is trimmed, and a planting area of the metal mine extremely-acidified waste dump is determined; a pre-prepared mineral functional agent is scattered into the planting area for pollution regulation and control; and a pre-prepared biological bacterium organic fertilizer is applied to the planting area subjected to pollution regulation and control, and nutrition regulation and control are conducted on soil in the planting area subjected to pollution regulation and control; according to a preset arbor-shrub-grass plant community planting scheme, shrub plant nursery stocks and arbor plant nursery stocks arerespectively planted to designated positions of the planting area after nutrition regulation and control, and herbaceous plant seeds are sowed in unoccupied positions of the planting area where the shrub plants and the arbor plants are planted according to a row-to-row sowing mode, and a primary ecological area is obtained. By utilizing the method, the engineering practical problems of slow vegetation establishment, unreasonable plant variety selection, poor stability, easy degradation, soil acid return, long time consumption for improvement and curing and the like at present can be solved.

Description

technical field [0001] The invention relates to the technical field of mine ecological restoration, and more specifically, relates to an ecological restoration method for extremely acidified dumps in metal mines. Background technique [0002] At present, there are about 800,000 mines in my country, of which about 400,000 mines need to be repaired or restored due to ecological environment damage. Mine wastelands refer to the land that loses its economic use value due to the pollution of open-pit mining plants, tailings areas, dumps, collapsed areas, and heavy metals during the mining process. Extremely acidic metal mine dumps represent a major type of abandoned heavy metal mining area, especially in southern China, where the annual rainfall is relatively large, and the possibility of catastrophic wind and rain attacks is greater, and it is easy to cause certain soil erosion when the rainy season comes , landslides and other geological hazards. Ecological restoration is an e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B09C1/00B09C1/08A01B79/02
CPCB09C1/00B09C1/08B09C1/105A01B79/02Y02P60/20
Inventor 张建锋董子平刘慧芳朱柱王旭刘安富何新春谢金亮王志高
Owner CHINA ENFI ENGINEERING CORPORATION
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