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Method for restoration of abandoned rare earth mine based on paspalum thunbergii cultivation

A rare earth and mine technology, applied in the field of remediation of abandoned rare earth mines, can solve problems such as unsuitable remediation of large-scale abandoned rare earth mines, 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: 2019-12-20
江西省核工业地质局二六四大队
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  • 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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  • Method for restoration of abandoned rare earth mine based on paspalum thunbergii cultivation
  • Method for restoration of abandoned rare earth mine based on paspalum thunbergii cultivation
  • Method for restoration of abandoned rare earth mine based on paspalum thunbergii cultivation

Examples

Experimental program
Comparison scheme
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 use spray sowing to evenly sow them in the stripping area of ​​the abandoned rare earth mine. The specific operation of spray sowing is as follows:

[0031] (1) Collect the soil in the soil area to be repaired for impurity removal and sieving to remove garbage, weeds, and large 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-acrylic acid salt copolymer), binding agent (polyacrylamide) and the soil powder obtained by step (1) are processed to prepare soil matrix, and the soil matrix obtained t...

Embodiment 1

[0046] 1. How to set up the processing group

[0047] 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.

[0048] 2. Repair effect

[0049] 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 r...

Embodiment 2

[0053] 1. How to set up the processing group

[0054] 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.

[0055] 2. Repair effect

[0056] 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 soi...

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Abstract

The invention provides a method for restoration of an abandoned rare earth mine based on paspalum thunbergii cultivation. The method comprises the following steps of S1, vegetation construction, wherein grass seeds of paspalum plants are sown in a to-be-restored soil area, and then the soil area is covered with a grass blanket; S2, vegetation cultivation, wherein 20-40 days after the grass seeds germinate, a nitrogen and phosphorus compound fertilizer and an organic fertilizer are topdressed, wherein the application standard of the nitrogen and phosphorus compound fertilizer is 150-250 kg / mu,and the application standard of the organic fertilizer is 400-600 kg / mu; S3, hyperaccumulator transfer, wherein 2-6 months after the grass seeds germinate, the parts, exposed from the ground, of the paspalum plants are harvested. According to the method, based on the restoration vegetation composed of the paspalum plants and the grass blanket, ecological restoration and management of the abandonedrare earth mine are carried out, and the method has various advantages of simple and convenient operation and management, high restoration efficiency, low cost, small environmental risks and environment beautifying, and is suitable for treatment of the abandoned rare earth mines, stopes and rare earth waste storage sites such as various 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 Applications(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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