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A method for repairing abandoned rare earth mines based on paspalum cultivation

A rare earth and mining technology, applied in the field of abandoned rare earth mine restoration, can solve problems such as unsuitable for large-scale abandoned rare earth mine restoration, unfavorable large-scale promotion, secondary pollution, etc., and achieve good social benefits, convenient and fast construction, and the effect of alleviating erosion

Active Publication Date: 2022-02-08
江西省核工业地质局二六四大队
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For example, the patent CN109137941A discloses a method for repairing mines, including cutting slopes and opening steps, regreening the slopes, building retaining walls at the foot of the slope, backfilling greening at the foot of the slope, and building intercepting ditches. The effect is good, but Its engineering volume is relatively large, and its cost is relatively high, which is not conducive to large-scale promotion
[0005] The traditional physical restoration, chemical restoration and engineering treatment methods have a large amount of work, high cost, easy to cause secondary pollution, and are not suitable for the restoration of large-scale abandoned rare earth mines

Method used

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  • A method for repairing abandoned rare earth mines based on paspalum cultivation
  • A method for repairing abandoned rare earth mines based on paspalum cultivation
  • A method for repairing abandoned rare earth mines based on paspalum cultivation

Examples

Experimental program
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Effect test

Embodiment 1

[0027] In this embodiment, ecological restoration is carried out by taking the mining and stripping area of ​​the abandoned rare earth mine in Zhanggong District, Ganzhou City as the restoration object.

[0028] 1. Development of ecological restoration

[0029] S1. Build vegetation:

[0030] Soak paspalum grass seeds in water at 50-60 °C for 4 hours, air-dry them naturally, and spray them evenly in the mining and stripping areas of abandoned rare earth mines. The specific operation of spraying is as follows:

[0031] (1) Collect the soil in the soil area to be repaired for impurity removal and sieving to remove garbage, weeds, large grains of gravel, and soil clods in the soil, so as to be used for spraying; (2) Take organic fertilizer (farmyard manure) , grass fiber, water-retaining agent (acrylamide-acrylate copolymer), binder (polyacrylamide) and the soil powder obtained in step (1) to prepare a soil matrix, which contains organic fertilizer 100 g / kg, grass fiber 300 g / kg...

Embodiment 1

[0045] 1. How to set up the treatment group

[0046] This embodiment is set as the control treatment of embodiment 1, to reflect the impact of the setting of the grass blanket on the restoration effect. In this example, two treatment groups were set up: treatment I, no grass blanket was used in the process of ecological restoration; treatment II, paspalum broad-leaved grass blanket was covered on the surface of the soil area sown with broad-leaved paspalum. In addition to the above variable settings, the location of the soil area selected for treatment I and treatment II and the ecological restoration measures carried out on the soil area were strictly consistent with those in Example 1.

[0047] 2. Repair effect

[0048] Table 2 shows the evaluation parameters for the ecological restoration effect of the mining and stripping areas of abandoned rare earth mines carried out in this example. The state evaluation parameters of each treatment group before restoration and after re...

Embodiment 2

[0051] 1. How to set up the treatment group

[0052] This embodiment is set as the control treatment of Embodiment 1 to reflect the influence of the sowing method on the restoration effect. In this example, one treatment group was set up: treatment III, sowing paspalum paspalum frontosa seeds in the soil area to be repaired in the traditional sowing form of manual sowing. In addition to the above variable settings, the location of the soil area selected for treatment III and the ecological restoration measures carried out on the soil area are strictly consistent with those in Example 1.

[0053] 2. Repair effect

[0054] Table 3 shows the evaluation parameters for the ecological restoration effect of the mining and stripping areas of abandoned rare earth mines carried out in this example. Compared with before restoration, after restoration, the average content of rare earth elements in the soil area selected for treatment III decreased, and the rare earth elements in the soil...

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Abstract

The present invention provides a method for repairing abandoned rare earth mines based on paspalum cultivation, comprising the following steps: S1. Constructing vegetation: sowing grass seeds of Paspalum plants in the soil area to be repaired, and then covering the soil area with grass blankets; S2. Vegetation cultivation: 20-40 days after the emergence of grass seeds, topdress nitrogen-phosphorus compound fertilizer and organic fertilizer. The application standard of nitrogen-phosphorus compound fertilizer is 150-250kg / mu, and the application standard of organic fertilizer is 400-600kg / mu; S3. Transplantation of hyperaccumulative plants: Paspalum plants exposed to the ground were harvested 2–6 months after grass seed emergence. The present invention is based on the restoration vegetation composed of Paspalum plants and grass blankets to carry out ecological restoration and treatment of abandoned rare earth mines. It has the advantages of simple operation and management, high restoration efficiency, low cost, low environmental risk, and can beautify the environment. It is suitable for the treatment of abandoned rare earth mines, stopes, and various rare earth waste residue storage sites such as waste ores and tailings piles.

Description

technical field [0001] The invention belongs to the technical field of repairing abandoned rare earth mines, and in particular relates to a method for repairing abandoned rare earth mines based on paspalum cultivation. Background technique [0002] Ganzhou is the source of the Ganjiang River and the Dongjiang River. It is also an important ecological barrier in the Poyang Lake Ecological Economic Zone. Its ecological environment value, status and role are irreplaceable. The development of rare earths in southern Ganzhou has made great contributions to the economic development of Ganzhou. At the same time, it has also formed a large number of abandoned rare earth mines, causing large-scale environmental pollution and ecological damage, and seriously restricting the sustainable development of southern Jiangxi. [0003] In addition, due to the simple operation and low cost of rare earth mining, there are too many rare earth mining enterprises, serious overexploitation and defor...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01G20/00A01G22/00A01G17/00A01G24/20A01G24/22A01G24/30A01B79/00A01B79/02
CPCA01G20/00A01G22/00A01G17/005A01G24/20A01G24/22A01G24/30A01B79/005A01B79/02
Inventor 稂涛陈仁祥宋勇王太伟马涛梁惕平
Owner 江西省核工业地质局二六四大队
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