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A method of ecological restoration in land reclamation of mining area

A technology for land and ecological restoration in mining areas, applied in the field of environmental restoration, can solve problems such as subsidence, unstable land structure in mining areas, and unstable soil configuration and structure, and achieve the effects of reducing evaporation, better nitrogen fixation, and enhanced infiltration effects

Inactive Publication Date: 2021-10-08
YUNNAN AGRICULTURAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after constructing the soil structure on the abandoned mine, trees and shrubs are planted after rotary tillage. Due to the instability of the land structure in the mining area, subsidence may occur during the rotary tillage process, and the constructed soil structure will not be correct. Stable, thereby affecting the ecological restoration of the entire mining area

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] A method for ecological recovery in land reclamation in mining areas, comprising the following steps:

[0030] (1) When the slope slope of the land in the mining area is greater than 30° and less than 65°, the slope shall be cut; when the slope is greater than 65°, the slope shall be protected and reinforced step by step from top to bottom to make it stable ;

[0031] Add coal gangue and fly ash to the land in the mining area for backfill leveling; the particle size of coal gangue is ≤0.5cm, and the ratio of coal gangue and fly ash is 1:0.2.

[0032] (2) Lay irrigation equipment on the land in the mining area, and install atomizing nozzles on the irrigation equipment.

[0033] (3) Lay sawdust, straw powder, animal manure, river sand, river mud, and loam from bottom to top on the backfilled and leveled mining land; the laying amount of sawdust is 100kg / mu; the laying amount of straw powder is 400kg / mu; the laying amount of decomposed animal manure is 800kg / mu; the layi...

Embodiment 2

[0041] A method for ecological recovery in land reclamation in mining areas, comprising the following steps:

[0042] (1) When the slope slope of the land in the mining area is greater than 30° and less than 65°, the slope shall be cut; when the slope is greater than 65°, the slope shall be protected and reinforced step by step from top to bottom to make it stable ;

[0043] Add coal gangue and fly ash to the land in the mining area for backfill leveling; the particle size of coal gangue is ≤0.5cm, and the ratio of coal gangue and fly ash is 1:0.3.

[0044] (2) Lay irrigation equipment on the land in the mining area, and install atomizing nozzles on the irrigation equipment.

[0045] (3) Lay sawdust, straw powder, animal manure, river sand, river mud, and loam from bottom to top on the backfilled and leveled mining land; the laying amount of sawdust is 120kg / mu; the laying amount of straw powder is 500kg / mu; the laying amount of decomposed animal manure is 500kg / mu; the la...

Embodiment 3

[0053] A method for ecological recovery in land reclamation in mining areas, comprising the following steps:

[0054] (1) When the slope slope of the land in the mining area is greater than 30° and less than 65°, the slope shall be cut; when the slope is greater than 65°, the slope shall be protected and reinforced step by step from top to bottom to make it stable ;

[0055] Add coal gangue and fly ash to the land in the mining area for backfill leveling; the particle size of coal gangue is ≤0.5cm, and the ratio of coal gangue and fly ash is 1:0.05.

[0056] (2) Lay irrigation equipment on the land in the mining area, and install atomizing nozzles on the irrigation equipment.

[0057] (3) Lay sawdust, straw powder, animal manure, river sand, river mud, and loam from bottom to top on the backfilled and leveled mining land; the laying amount of sawdust is 130kg / mu; the laying amount of straw powder is 300kg / mu; the laying amount of decomposed animal manure is 600kg / mu; the l...

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Abstract

The invention provides an ecological restoration method in land reclamation in mining areas, comprising the following steps: (1) leveling backfill; (2) laying irrigation equipment, and setting atomizing nozzles on the irrigation equipment; (3) topping the mining area land Lay sawdust, straw powder, animal manure, river sand, river mud, and loam in sequence; (4) Spray water once every two days, and the amount of water sprayed each time is 3‑6m 3 / mu; (5) after continuous spraying for 40-50 days, sprinkle a layer of microbial compound fertilizer; plow; (6) after idle, sprinkle grass seeds, spray water once every 10-15 days, the amount of water sprayed each time 1‑2m 3 per mu; after 5‑7 months, plant shrubs and trees, spray water once every 25‑30 days, and the amount of water each time is 2.5‑3m 3 / mu. The method of the invention can gradually restore the land to a stable soil structure, prevent subsequent collapse, effectively improve the soil composition, restore a good microbial environment, and then combine phytoremediation to achieve good ecological restoration of the land in the mining area.

Description

technical field [0001] The invention relates to the technical field of environmental restoration, in particular to an ecological restoration method in land reclamation in mining areas. Background technique [0002] The development of mineral resources can provide the necessary energy and resources for economic development and is a booster for economic development, but it also has a relatively serious negative impact on the environment. The main manifestations are: the development and utilization of mineral resources will inevitably occupy and destroy land, causing serious damage to the original topography and landscape, and may also cause environmental pollution in the process, bringing difficulties for the sustainable development of the economy and society, forming intergenerational externalities and seriously affect subsequent development. Whether the development and utilization of land resources in mining areas is reasonable or not has become an important factor restrict...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B09C1/10B09C1/00
CPCB09C1/10B09C1/105B09C2101/00
Inventor 张耿杰谢倩张川余建新郑宏刚刘淑霞
Owner YUNNAN AGRICULTURAL UNIVERSITY
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