阅读说明：本技术 缺乏客土的生态脆弱区域的矿区生态修复方法和分层结构 (Method for ecologically restoring mining area in ecologically vulnerable area lacking foreign soil and layered structure ) 是由 刘祥宏 辛建宝 陈永福 丁鑫品 张会军 孙家恺 温馨 桑盛 肖炜 黄占斌 王宏 于 2020-11-10 设计创作，主要内容包括：本发明提出一种缺乏客土的生态脆弱区域的矿区生态修复方法和分层结构,其中,方法包括：将矿区中的待恢复区域进行划分,得到复绿造景区域和渣石覆盖造景区域；采用可用土壤基质对复绿造景区域进行覆土施工；根据矿区的地理位置确定待播种的草本植物,并将草本植物的草籽撒播在复绿造景区域；在渣石覆盖造景区域的底部填充第一类渣石,填充高度为第一高度；在填充第一类渣石后的渣石覆盖造景区域上覆盖设定粒径的第二类渣石,覆盖厚度为第二高度；第一类渣石和第二类渣石是将矿区渣石按照材料性质进行分类得到的,第一类渣石的风化速度快于第二类渣石,设定粒径的取值大于5cm。由此,可实现提升草本植物的存活率,提升复绿造景区域的复绿工程效果。(The invention provides an ecological restoration method and a layered structure for a mining area in an ecological fragile area lacking foreign soil, wherein the method comprises the following steps: dividing a region to be restored in a mining area to obtain a green landscaping area and a slag stone covered landscaping area; carrying out soil covering construction on the green landscaping area by adopting an available soil matrix; determining herbaceous plants to be sown according to the geographical position of the mining area, and sowing grass seeds of the herbaceous plants in a green landscaping area; filling a first type of slag stones at the bottom of the slag stone covered landscaping area, wherein the filling height is a first height; covering a second slag stone with a set particle size on the slag stone covering landscaping area filled with the first slag stone, wherein the covering thickness is a second height; the first type of slag stones and the second type of slag stones are obtained by classifying the slag stones in the mining area according to material properties, the weathering speed of the first type of slag stones is faster than that of the second type of slag stones, and the value of the set particle size is larger than 5 cm. Therefore, the survival rate of herbaceous plants can be improved, and the greening engineering effect of a greening landscaping area is improved.)

1. A method for ecologically remediating a mine area in an ecologically vulnerable area lacking alien soil, comprising the steps of:

dividing a region to be restored in a mining area to obtain a green landscaping area and a slag stone covered landscaping area; the area of the greening landscaping area is determined according to the thickness of a soil layer required to be covered by preset grassland greening and the resource amount of available soil matrixes of the mining area; the thickness of the soil layer is 10cm to 30 cm;

adopting the available soil matrix to carry out soil covering construction on the green landscaping area;

determining herbaceous plants to be sown according to the geographical position of the mining area, and sowing grass seeds of the herbaceous plants in the green landscaping area;

filling a first type of slag stones at the bottom of the slag stone covered landscaping area, wherein the filling height is a first height;

covering a second slag stone with a set particle size on the slag stone covering landscaping area filled with the first slag stone, wherein the covering thickness is a second height; the first type of slag stones and the second type of slag stones are obtained by classifying the slag stones in the mining area according to material properties, the weathering speed of the first type of slag stones is faster than that of the second type of slag stones, and the value of the set particle size is larger than 5 cm.

2. The method according to claim 1, wherein before the dividing the area to be restored in the mining area, the method further comprises:

classifying the first type of slag stones according to particle size values to obtain a third type of slag stones and a fourth type of slag stones; wherein the particle size of the third type of slag stone is larger than that of the fourth type of slag stone;

and backfilling the mining bottom of the mining area by adopting the third type of slag stones.

3. The method of claim 1, wherein after the filling of the first type of ballast at the bottom of the ballast-covered landscaping area, the method further comprises:

and broadcasting grass seeds of the herbaceous plants on the slag stone covered landscaping area filled with the first type of slag stones.

4. The method of claim 1, wherein after the set particle size of the second type of ballast stone is covered on the ballast stone covered landscaping area after the filling of the first type of ballast stone, the method further comprises:

and covering the second slag stone on the slag stone covering landscaping area again.

5. The method of claim 1, wherein the greenish landscaping area and the ballast covering landscaping area are of a set geometry.

6. The method according to claim 1, wherein the resource amount of the available soil matrix in the mining area comprises the resource amount of the available topsoil resource in the mining area and the resource amount of the fine-grained material with a grain size smaller than a preset threshold value, wherein the preset threshold value is 1 cm.

7. The method of claim 1, wherein the green landscaping area and the ballast covering landscaping area are in a cross-over relationship or a mosaic layout relationship.

8. The method as claimed in claim 1, wherein said covering said green landscaping area with said available soil matrix comprises:

determining a soil amendment material based on the geographical location of the mine area and the properties of the available soil substrate;

and mixing the available soil matrix with the soil improvement material, and performing soil covering construction on the green landscaping area according to the available soil matrix mixed with the soil improvement material.

9. A layered structure of mining area soil is characterized in that the mining area is divided into a complex green landscaping area and a slag stone covering landscaping area,

the green-recovering landscaping area comprises a soil matrix layer, grass seeds of herbaceous plants are sown on the soil matrix layer, and the herbaceous plants are determined according to the geographical position of the mining area; the thickness of the soil matrix layer is 10cm to 30 cm;

the slag stone covering landscaping area comprises a first slag stone layer and a second slag stone layer, wherein the first slag stone layer is composed of a first type of slag stone, the second slag stone layer is composed of a second type of slag stone, the first type of slag stone and the second type of slag stone are obtained by classifying the slag stones in a mining area according to material properties, the weathering speed of the first type of slag stone is higher than that of the second type of slag stone, and the particle size value of the second type of slag stone is larger than 5 cm.

10. The layered structure of claim 9, wherein the soil matrix layer is comprised of topsoil available at the mine site and fine materials having a particle size less than a predetermined threshold.

Technical Field

The invention relates to the field of ecological restoration, in particular to an ecological restoration method and a layered structure for a mining area in an ecological fragile area lacking foreign soil.

Background

Mining resources in mining areas cause serious ecological damage to stopes and storage yard areas. For ecological vulnerable areas such as high cold areas and sandy areas, ecological restoration of mining areas is very difficult, and particularly under the condition that available foreign soil resources are lacked in a certain range of the local area and the periphery, even if strict mining and surface soil stripping and preservation measures for occupying the areas are implemented in the early stage, a soil matrix layer with enough thickness is still difficult to be created for the green-recovering plants in the later stages of areas such as stopes and storage yards. Under the condition, the implemented greening engineering has the problems that greening vegetation is difficult to grow and survive, serious degradation is caused, ecological restoration engineering is difficult to continuously exert the effect for a long time, and the like.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.

The invention aims to provide an ecological restoration method and a layered structure for a mining area in an ecological fragile area lacking foreign soil, so as to improve the survival rate of herbaceous plants and improve the greening engineering effect of a greening landscaping area. And moreover, the growth and recovery of the natural falling plants can be promoted, so that the ecological recovery project can continuously exert the effect for a long time.

The embodiment of the first aspect of the invention provides a mining area ecological restoration method for an ecological fragile area lacking foreign soil, which comprises the following steps:

dividing a region to be restored in a mining area to obtain a green landscaping area and a slag stone covered landscaping area; the area of the greening landscaping area is determined according to the thickness of a soil layer required to be covered by preset grassland greening and the resource amount of available soil matrixes of the mining area; the thickness of the soil layer is 10cm to 30 cm;

adopting the available soil matrix to carry out soil covering construction on the green landscaping area;

determining herbaceous plants to be sown according to the geographical position of the mining area, and sowing grass seeds of the herbaceous plants in the green landscaping area;

filling a first type of slag stones at the bottom of the slag stone covered landscaping area, wherein the filling height is a first height;

covering a second slag stone with a set particle size on the slag stone covering landscaping area filled with the first slag stone, wherein the covering thickness is a second height; the first type of slag stones and the second type of slag stones are obtained by classifying the slag stones in the mining area according to material properties, the weathering speed of the first type of slag stones is faster than that of the second type of slag stones, and the value of the set particle size is larger than 5 cm.

In the second aspect, the embodiment of the invention provides a layered structure of the soil in a mining area, the mining area is divided into a green landscaping area and a slag stone covering landscaping area,

the green-recovering landscaping area comprises a soil matrix layer, grass seeds of herbaceous plants are sown on the soil matrix layer, and the herbaceous plants are determined according to the geographical position of the mining area; the thickness of the soil matrix layer is 10cm to 30 cm;

the slag stone covering landscaping area comprises a first slag stone layer and a second slag stone layer, wherein the first slag stone layer is composed of a first type of slag stone, the second slag stone layer is composed of a second type of slag stone, the first type of slag stone and the second type of slag stone are obtained by classifying the slag stones in a mining area according to material properties, the weathering speed of the first type of slag stone is higher than that of the second type of slag stone, and the particle size value of the second type of slag stone is larger than 5 cm.

One embodiment of the above invention has the following advantages or benefits:

by utilizing the limited available soil matrix in the mining area, the greenery restoration landscaping area of the thick-layer soil is constructed, the survival rate of herbaceous plants can be improved, and the greenery restoration engineering effect of the greenery restoration landscaping area is improved. And moreover, the easily weathered slag stones are filled at the bottom of the slag stone covering landscaping area, and the slag stones which are not easily weathered and have large particle sizes are covered at the upper part, so that conditions can be provided for the weathering process of the easily weathered slag stones at the bottom, the growth recovery of the natural falling plants in the later period is promoted, and the ecological recovery engineering can continuously exert the effect for a long time.

It should be understood that the statements in this section do not necessarily identify key or critical features of the embodiments of the present invention, nor do they limit the scope of the present disclosure. Other features of the present invention will become apparent from the following description.

Drawings

The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic flow chart of a method for restoring ecology in a mining area of an ecologically vulnerable area lacking foreign soil according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a mine soil of an embodiment of the present invention;

fig. 3 is a top view of a mine site according to an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

The method for ecologically restoring a mine area in an ecologically vulnerable area lacking alien soil and the layered structure according to an embodiment of the present invention will be described with reference to the accompanying drawings.

Fig. 1 is a schematic flow chart of a mining area ecological remediation method for an ecologically vulnerable area lacking alien soil according to an embodiment of the present invention.

As shown in fig. 1, the method for restoring ecology in a mining area of an ecologically vulnerable area lacking alien soil may include the steps of:

step 101, dividing a region to be restored in a mining area to obtain a complex green landscaping region and a slag stone covered landscaping region; the area of the greening landscaping area is determined according to the thickness of a soil layer which is covered by the preset grassland greening and the resource amount of available soil matrixes in the mining area.

In the embodiment of the invention, in order to create a soil matrix layer with enough thickness for the plants and improve the survival rate of the plants, the value range of the thickness of the soil layer covered by the preset grassland greening can be [10cm,30cm ].

In the embodiment of the invention, the resource amount of the available soil matrix in the mining area can be predicted, and the coverage area of the available soil matrix resource in the mining area is calculated according to the resource amount of the available soil matrix in the mining area and the preset soil layer thickness required to be covered by the grassland greening.

In one possible implementation of the embodiment of the present invention, in order to create a soil matrix layer with a sufficient thickness for the plant and to increase the coverage area of the plant, the resource amount of the available soil matrix in the mining area may include the resource amount of the available topsoil resource in the mining area and the resource amount of the fine-grained material with a grain size smaller than a preset threshold. Wherein, the preset threshold value can be 1 cm. For example, the resource amount of the fine material may include a resource amount of a surface soil stripping storage of a mining area, a slag yard, and the like, an amount of fine particles formed by chipping during a dumping process of the discard, and an amount of fine particles formed after the discard is weathered. Therefore, the existing measures for stripping surface soil and improving fine-grained materials are utilized to intensively construct the soil with the thickness required by greening, so that the ecological reconstruction cost is obviously reduced, and the greening engineering effect of a greening landscaping area is improved.

In the embodiment of the invention, the slag stone covered landscaping area is an area except for the green-restoring landscaping area in the area to be restored, and the area of the slag stone covered landscaping area is the difference value between the area of the area to be restored and the area of the green-restoring landscaping area.

In the embodiment of the invention, the area to be recovered and treated in the mining area can be determined firstly, and is recorded as the area to be recovered, and then the area to be recovered is divided according to the area of the area to be recovered to obtain a complex green landscaping area and a slag stone covered landscaping area. The greening landscaping area and the slag stone covering landscaping area can both comprise a flat ground (platform) and a slope, and the greening landscaping area and the slag stone covering landscaping area can be in a cross relationship or an embedded layout relationship.

In a possible implementation manner of the embodiment of the present invention, the greening landscaping area and the ballast covering landscaping area may have a set geometric shape in order to improve the aesthetic property and the ornamental property of the mining area after ecological restoration, or to generate a higher landscape effect.

102, adopting available soil matrix to carry out soil covering construction on the green landscaping area.

In the embodiment of the invention, after the green landscaping area is obtained by division, soil covering construction can be carried out on the green landscaping area by using available soil matrix. For example, the covering construction can be performed on the green-covered landscaping area by adopting the available surface soil of the mining area and the fine-grained material with the grain size smaller than the preset threshold.

And 103, determining herbaceous plants to be sown according to the geographical positions of the mining areas, and broadcasting grass seeds of the herbaceous plants in the green landscaping areas.

In a possible implementation manner of the embodiment of the present invention, in order to not destroy the local ecological environment of the mining area and improve the survival rate of the green plants, herbaceous plants to be sown can be determined according to the geographical location of the mining area, and grass seeds of the herbaceous plants are sown in the green-restoring landscaping area.

In another possible implementation manner of the embodiment of the present invention, in order to further improve the survival rate of green plants, the soil improvement material may be blended into an available soil matrix, and soil covering construction may be performed on the green-recovered landscaping area according to the available soil matrix after the soil improvement material is blended.

It can be understood that the soil conditions in different regions are different, and in order to further improve the survival rate of green plants, the soil improvement material can be determined according to the geographical position of the mining area and the properties of the available soil matrix, the available soil matrix is mixed with the soil improvement material, and the soil covering construction is carried out on the green-restoring landscaping area according to the available soil matrix mixed with the soil improvement material.

Wherein the soil improvement material may include: one or more of water-retaining agent, biochar, humic acid, organic fertilizer, decomposed farmyard manure and chemical fertilizer.

As one example, the local climate conditions of the mine area may be determined based on the geographic location of the mine area, and the soil amendment material may be determined based on the local climate conditions of the mine area and the nature of the available soil substrate. For example, in the case of a mining area in a arid or semi-arid area, because surface soil and foreign soil are lacked, precipitation is low, and the water holding capacity of the soil is weak, a water retention agent can be applied, and other soil improvement materials such as biochar, organic fertilizer, humic acid and the like can be added to play a role in improvement. For the mining area in the alpine and high-altitude areas, the problem of insufficient moisture is not needed to be considered too much outside the deslagging mountain area, so that a water-retaining agent is not needed, the problem of slow release of low-temperature fertilizer efficiency is needed to be considered in the areas, the early nutrients can be increased by utilizing a compound fertilizer and a decomposed sheep manure, and other soil improvement materials such as biochar, organic fertilizer and humic acid are added to play an improvement role together.

In a possible implementation manner of the embodiment of the invention, after the grass seeds of the herbaceous plants are sown in the green-restoring landscaping area, watering maintenance and the like can be performed on the green-restoring landscaping area, so as to further improve the survival rate of the green plants.

And 104, filling the first type of slag stones at the bottom of the slag stone covered landscaping area, wherein the filling height is the first height.

In the embodiment of the invention, the value of the first height can be 1cm to 10 cm.

In the embodiment of the invention, the first type of slag stone can be slag stone with a higher weathering speed, namely the first type of slag stone is slag stone which is easy to weather, such as mudstone, sandstone and the like.

In the embodiment of the invention, the first type of slag stones can be filled at the bottom of the slag stone covered landscaping area, and the filling height is the first height. After the first type of ballast is filled, grass seeds of herbaceous plants may be sown, or alternatively, grass seeds of herbaceous plants may not be sown, which is not limited by the present invention.

105, covering a second slag stone with a set particle size on the slag stone covered landscaping area filled with the first slag stone, wherein the covering thickness is a second height; the first type of slag stones and the second type of slag stones are obtained by classifying the slag stones in the mining area according to material properties, the weathering speed of the first type of slag stones is higher than that of the second type of slag stones, and the value of the set particle size is larger than 5 cm.

In the embodiment of the invention, the value of the second height can be 1cm to 20cm, so that dust suppression is ensured, and natural falling and growth of vegetation are facilitated.

In the embodiment of the invention, the second type of slag stone can be slag stone with a slower weathering speed, namely the second type of slag stone is slag stone which is difficult to weather or slag stone which is difficult to weather. The value of the particle size of the second slag stone is preferably 5cm to 10cm and larger than that of the second slag stone, so that conditions can be provided for the weathering process of the first slag stone with easily weathered bottom, and the growth and recovery of natural falling plants in the later period are promoted.

Therefore, by utilizing the limited soil and fine particle material resources in the mining area, a complex green landscaping area of the thick-layer soil and a slag stone covered area which does not need to be covered by the soil are respectively constructed, the ecological restoration landscape construction in the mining area is carried out in a differentiated mode, and the efficient construction of the near-natural ecological landscape in the mining area of the ecological fragile area lacking the foreign soil is facilitated.

It should be noted that, the present invention is only exemplified by the steps 104 to 105 being executed after the steps 102 and 103, and when the present invention is actually applied, the steps 104 to 105 may also be executed before the step 102, or the steps 104 to 105 may also be executed in parallel with the steps 102 to 103, which is not limited by the embodiment of the present invention.

According to the mining area ecological restoration method for the ecological fragile area lacking the foreign soil, the area to be restored in the mining area is divided, and a green-recovering landscaping area and a slag stone covering landscaping area are obtained; adopting available soil matrix to carry out soil covering construction on the green landscaping area; determining herbaceous plants to be sown according to the geographical position of the mining area, and sowing grass seeds of the herbaceous plants in a green landscaping area; filling a first type of slag stones at the bottom of the slag stone covered landscaping area, wherein the filling height is a first height, covering a second type of slag stones with a set particle size on the slag stone covered landscaping area filled with the first type of slag stones, and the covering thickness is a second height; the first type of slag stones and the second type of slag stones are obtained by classifying the slag stones in the mining area according to material properties, the weathering speed of the first type of slag stones is higher than that of the second type of slag stones, and the value of the set particle size is larger than 5 cm. Therefore, the method utilizes the limited available soil matrix in the mining area to construct the greening landscaping area of the thick-layer soil, can improve the survival rate of herbaceous plants, and improves the greening engineering effect of the greening landscaping area. And moreover, the easily weathered slag stones are filled at the bottom of the slag stone covering landscaping area, and the slag stones which are not easily weathered and have large particle sizes are covered at the upper part, so that conditions can be provided for the weathering process of the easily weathered slag stones at the bottom, the growth recovery of the natural falling plants in the later period is promoted, and the ecological recovery engineering can continuously exert the effect for a long time.

It can be understood that grass seeds of herbaceous plants are sown on the stone covering landscaping area filled with the first type of stones, and when the easily weathered first type of stones are weathered, the later growth recovery of herbaceous plants can be promoted.

In a possible implementation manner of the embodiment of the present invention, after the set particle size of the second type of ballast is covered on the ballast covered landscaping area filled with the first type of ballast, the second type of ballast may be covered on the ballast covered landscaping area again. Therefore, by paving two layers of second slag stones with large particle sizes, conditions can be further provided for the weathering process of the first slag stones which are easy to be weathered at the bottoms, and the growth and recovery of the natural falling plants in the later period are promoted.

In a possible implementation manner of the embodiment of the present invention, before the area to be restored in the mining area is divided, the mining bottom of the mining area may be backfilled by using the large-particle-size slag stones in the first type of slag stones. Specifically, the first type of slag can be classified according to the particle size value to obtain a third type of slag and a fourth type of slag; and the third slag stone is adopted to backfill the mining bottom of the mining area.

For example, the slag stones in the mining area which are not screened or mud rocks, sandstone and the like in the first type of slag stones which are easily weathered in the slag stones with large particle sizes can be adopted to backfill the bottom of the mining area pit and the bottoms of other shaping areas so as to improve the attractiveness of the mining area after ecological restoration, and meanwhile, the bottom of the mining area is backfilled, so that the survival rate of vegetation can be improved.

As an example, the complex green landscaping area is designed for conventional ecological greening, and may include: slope design, earthing acquisition design, earthing character improvement and fertility improvement, greening adopt native herbaceous plant species selection, seeding design, maintenance design and the like, and a near-natural grassland landscape with edge geometric appearance is created.

The slag stone covering landscaping area is mainly used for landscape design and can comprise: carrying out sorting design on the slag stones in the mining area according to the material properties and the particle size; performing surface texture modeling and layered covering application design by using the slag stones, and creating a near-natural slag stone beach landscape with a regular mode, a distributed type and an edge geometric shape; the lower part of the slag stone covering area is designed to broadcast or not broadcast grass seeds. The properties of the slag stone materials are divided according to the weathering difficulty, the slag stone which is not easy to weather is selected on the surface layer, the grain size of the slag stone on the surface layer is required to be 1cm or more, and the slag stones can be grouped according to the grain size to obtain 1cm-5cm, 5cm-10cm, 10cm-20cm, more than 20cm and other slag stone grain size groups.

Therefore, through full and reasonable resource and landscape planning design, limited soil and fine material resources in a mining area are utilized, a green-restoring landscaping area of thick-layer soil and a slag stone covering area which does not need soil covering are respectively constructed in the mining area, ecological restoration landscape construction of the mining area is carried out in a differentiated mode, especially, a long-looking and overlooking vein landscape is created, and the ecological fragile area lacking in extra soil is facilitated, and a near-natural ecological system is economically and efficiently constructed in the mining area.

As an example, referring to fig. 2, fig. 2 is a cross-sectional view of a mine soil according to an embodiment of the present invention. The method comprises the steps of filling slag stones at the mining bottom of a mining area, dividing the mining area to obtain a green-covered landscaping area and a slag stone covered landscaping area, adopting available soil matrix to carry out soil covering construction on the green-covered landscaping area, sowing grass seeds of herbaceous plants in the local part of the mining area in the green-covered landscaping area, watering and maintaining the grass seeds, and forming a green-covered grass planting area. Covering the landscaping area with the slag stones except the green landscaping area.

As another example, a greenish landscaping area with an edge geometry and a ballast-covered landscaping area may be created. For example, referring to fig. 3, fig. 3 is a top view of a mine area according to an embodiment of the present invention. The complex green landscaping area 31 and the slag stone covering landscaping area 32 are set geometric shapes. Thus, a high landscape effect can be produced.

In the embodiment of the invention, the slag stones with specific textures and particle sizes are adopted to cover the landscaping area in the area to be recovered in the mining area, and the landscape construction of the distant view, overhead view ground pattern and patch modeling is carried out, so that conditions are provided for gradually recovering vegetation nature while the landscape effect is generated. And the method has strong operability, can be suitable for ecological restoration and landscape reconstruction of high-cold high-altitude, arid and other areas lacking in green-recovering soil, and improves the applicability of the method.

In order to realize the embodiment, the invention further provides a layered structure of the mining area soil. The mining area is divided into a complex green landscaping area and a slag stone covering landscaping area.

The green-recovering landscaping area comprises a soil matrix layer, wherein grass seeds of herbaceous plants are sown on the soil matrix layer, and the herbaceous plants are determined according to the geographical position of a mining area. Wherein the thickness of the soil matrix layer is 10cm to 30 cm.

The slag stone covering landscaping area comprises a first slag stone layer and a second slag stone layer, wherein the first slag stone layer is composed of a first type of slag stone, the second slag stone layer is composed of a second type of slag stone, the first type of slag stone and the second type of slag stone are obtained by classifying the slag stone in the mining area according to material properties, the weathering speed of the first type of slag stone is faster than that of the second type of slag stone, and the particle size value of the second type of slag stone is larger than 5 cm.

In the embodiment of the invention, in order to create a soil matrix layer with enough thickness for green plants and increase the coverage area of the green plants, the soil matrix layer can be composed of surface soil available in a mining area and fine-grained materials with the grain size smaller than a preset threshold value.

In the embodiment of the invention, the height of the first slag stone layer can be a first height, and the height of the second slag stone layer can be a second height, wherein the first height can be 1cm to 10cm, and the second height can be 1cm to 20 cm.

It should be noted that the explanation of the mining area ecological remediation method for the ecologically vulnerable area lacking the foreign soil in the foregoing embodiment also applies to the layered structure of the mining area soil in this embodiment, and details are not repeated here.

According to the layered structure of the mining area soil, the thick soil matrix layer is constructed by using the limited available soil matrix in the mining area, so that the survival rate of herbaceous plants can be improved, and the greening engineering effect of a greening landscaping area can be improved. And moreover, the easily weathered slag stones are filled at the bottom of the slag stone covering landscaping area, and the slag stones which are not easily weathered and have large particle sizes are covered at the upper part, so that conditions can be provided for the weathering process of the easily weathered slag stones at the bottom, the growth recovery of the natural falling plants in the later period is promoted, and the ecological recovery engineering can continuously exert the effect for a long time.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.