CN215074397U

CN215074397U - Soil structure for planting vegetation

Info

Publication number: CN215074397U
Application number: CN202121655641.2U
Authority: CN
Inventors: 刘艺军; 周婧; 鲁敏; 王志波; 董建广
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-07-21
Filing date: 2021-07-21
Publication date: 2021-12-10
Anticipated expiration: 2031-07-21

Abstract

The utility model relates to a soil structure that vegetation was planted, characterized by: comprises a gravel layer, a fly ash layer and a mine waste layer which are sequentially distributed from top to bottom. The advantages are that: mine wastes are digested on the spot, the fly ash consumption of a power plant is large, waste is turned into wealth, ecological restoration is rapidly carried out, the restoration process is green, environment-friendly and low in cost, secondary environment damage cannot be caused, the restored soil structure does not raise dust, the survival rate of planted vegetation is high, and the ecological restoration effect is good.

Description

Soil structure for planting vegetation

Technical Field

The utility model relates to a soil structure that vegetation was planted belongs to the soil structure technical field who plants the forest and grass vegetation.

Background

Mining is very environmentally damaging, for example: the fully-meshed and bruise-shaped pit is formed everywhere in a mined ore area of iron ores, opencast coal mines and the like, the periphery of the mined ore area is a dumping yard, a large amount of mine waste is stacked, grass grows little, and a large amount of coal gangue is stacked in the open air and is extremely easy to spontaneously combust. In recent years, China insists on ecological priority and green development. The concept of 'green water green mountain is the Jinshan Yinshan' is firmly established, the strategic strength of enhancing the ecological civilization construction is kept, the promotion of the green mine construction is accelerated, and the ecological restoration is required for the mining. The current repair mode is as follows: backfilling mine waste (such as coal gangue), covering soil, and planting vegetation. However, there is often no soil near the mine, and long-distance soil sampling is required, which not only has very high cost, but also causes secondary environmental damage.

Fly ash is fine ash collected from flue gas generated after coal combustion, and is main solid waste discharged from coal-fired power plants. The main oxide composition of the fly ash of the thermal power plant in China is SiO₂、Al₂O₃、FeO、Fe₂O₃、CaO、TiO₂And the like. Along with the development of the power industry, the discharge amount of fly ash of coal-fired power plants is increased year by year, and the fly ash becomes one of industrial waste residues with larger discharge amount in China. A large amount of fly ash can generate dust without treatment, thereby polluting the atmosphere; if discharged into a water system, the river can be silted, and toxic chemicals in the river can cause harm to human bodies and organisms. The comprehensive utilization of the fly ash changes waste into valuable and harmful into beneficial, becomes an important technical and economic policy in the economic construction of China, is an important means for solving the contradiction between environmental pollution and resource shortage in power production in China, and is one of the tasks to be solved in power production. Currently, the comprehensive utilization of fly ash is mainly as follows: all departments such as construction, building materials, water conservancy and the like are applied, but the application amount is far from the discharge amount of a power plant.

Disclosure of Invention

The utility model aims at providing a can utilize fly ash in a large number, can carry out ecological remediation fast again, green is with low costs, ecological remediation is effectual, can not cause the soil structure that the vegetation that secondary environment destroys plants.

The utility model discloses a realize by following technical scheme:

a soil structure for vegetation planting characterized by: comprises a gravel layer, a fly ash layer and a mine waste layer which are sequentially distributed from top to bottom.

The gravel layer is composed of coarse sand grains with the grain diameter of more than or equal to 0.25 mm and gravel grains with the grain diameter of 0.25 mm-100 mm or a mixture of the coarse sand grains and the gravel grains;

the gravel is formed by crushing coal gangue or rock;

the thickness of the gravel layer is 5-15 cm;

the thickness of the fly ash layer is 10-200 cm;

the thickness of the coal gangue layer is not limited.

The utility model has the advantages that: mine wastes are digested on the spot, the fly ash consumption of a power plant is large, waste is turned into wealth, ecological restoration is rapidly carried out, the restoration process is green, environment-friendly and low in cost, secondary environment damage cannot be caused, the restored soil structure does not raise dust, the survival rate of planted vegetation is high, and the ecological restoration effect is good.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

In the figure: 1. a gravel layer; 2. a layer of fly ash; 3. a mine waste layer.

Detailed Description

Referring to the attached figure 1, the utility model comprises a gravel layer 1, a fly ash layer 2 and a mine waste layer 3 which are distributed from top to bottom in sequence. The gravel layer is composed of coarse sand grains with the grain diameter of more than or equal to 0.25 mm, gravel grains (blocks) with the grain diameter of 0.25 mm-100 mm or a mixture of the coarse sand grains and the gravel grains (blocks); the gravel is formed by crushing coal gangue or rock; the thickness of the gravel layer is 5-15 cm; the thickness of the fly ash layer is 10-200 cm; the thickness of the mine waste layer is not limited.

The utility model discloses mainly be to the ecological remediation after the mine exploitation. Firstly, mine waste is used for burying a pit to form a mine waste layer, then 10-200 cm thick fly ash is covered on the mine waste layer, and a fly ash layer is formed after the fly ash layer is uniformly paved, wherein the thickness of the fly ash layer is related to the variety of vegetation to be planted in ecological restoration, grass or shrub is planted, the thickness of the fly ash layer can be thin, tall trees are planted, and the thickness of the fly ash layer needs to be thicker; and finally, covering a gravel layer with the thickness of 5-15 cm on the fly ash layer and uniformly paving the gravel layer.

The utility model discloses especially adapted forest and grass vegetation is planted, and mine waste is the stone mainly, if: coal gangue, various rocks and the like, so the mine waste layer can help crops to fix roots, the fly ash layer replaces soil, the fly ash is an inorganic mixture, is an artificial pozzolana mixed material, contains various mineral substances, can provide nutrients necessary for the growth of the crops, and has good water absorption and drainage performance and air permeability; the gravel layer is used for covering and preventing the fly ash from being blown up by wind, so that the grain diameter of the gravel is based on the standard that the gravel cannot be blown up by strong wind, and the gravel layer has good water and air permeability.

Adopt the utility model discloses a soil structure selects the open pit coal mine and the iron ore of inner mongolia to carry out ecological remediation experiment, and planting grass, shrub, rose willow, salix mongolica, poplar, forest and grass vegetation such as willow have gained huge success, and the survival rate of forest and grass vegetation is close 100%, and the growth vigor is good.

Claims

1. A soil structure for vegetation planting characterized by: comprises a gravel layer, a fly ash layer and a mine waste layer which are sequentially distributed from top to bottom.

2. A vegetation planted soil structure as claimed in claim 1 wherein: the gravel layer is composed of coarse sand grains with the grain diameter of more than or equal to 0.25 mm and gravel grains with the grain diameter of 0.25 mm-100 mm or a mixture of the coarse sand grains and the gravel grains.

3. A vegetation planted soil structure as claimed in claim 2 wherein: the gravel is formed by crushing coal gangue or rock.

4. A vegetation planted soil structure as claimed in claim 1 wherein: the thickness of the gravel layer is 5-15 cm.

5. A vegetation planted soil structure as claimed in claim 1 wherein: the thickness of the fly ash layer is 10-200 cm.