Ecological restoration structure for waste slag field in arid region

Abstract

The utility model belongs to the technical field of ecological restoration, and particularly discloses an ecological restoration structure of an arid area waste residue field, a plurality of transverse strip ditches or hemispherical nest ditches are arranged on a slope surface of the arid area waste residue field, multi-cavity vegetation bags I and II are bag-shaped structures filled with matrixes and seeds, and a plurality of multi-cavity vegetation bags I are laid on the slope surface. A plurality of multi-cavity vegetation bags II are embedded into the strip-shaped ditches or the hemispherical nest ditches, the top layer cavities of the multi-cavity vegetation bags I and the tops of the multi-cavity vegetation bags II are filled with seed and germination base material mixtures, the bottom cavities of the multi-cavity vegetation bags I and II are filled with vegetation moisturizing cotton, and the middle cavities of the multi-cavity vegetation bags I and II are filled with vegetation growth base materials. According to the utility model, the plurality of strip ditches are arranged on the slope surface of the waste residue field, and the multi-cavity vegetation bags I and II are covered in the slope surface and the strip ditches, so that not only can nutrition required by vegetation be met, but also the problems of high maintenance cost, low vegetation survival rate and the like caused by rare rainfall and strong sunlight in the arid region are solved; the device has the characteristics of simple structure, high rainfall utilization rate, good moisture retention and heat insulation, high vegetation survival rate and long service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of ecological restoration, and specifically relates to an ecological restoration structure for a waste dump in arid areas with simple structure, high precipitation utilization rate, good moisture retention and heat insulation, high vegetation survival rate and long service life. Background Art

[0002] Most of the waste slag generated during the mining, selection and smelting of mineral resources is stored in the open air in the mining area. The waste slag is affected by wind, sun, rain and snow, and can easily induce dust, soil erosion, etc. Therefore, it is necessary to carry out ecological restoration and management.

[0003] At present, there are two main methods for ecological restoration of waste dumps: one is to mix natural soil, humus soil, etc. with seeds, and then directly lay them on the surface of the waste dump as a matrix layer for vegetation growth; the other is to use the vegetation bag technology, put the vegetation substrate and vegetation seeds into the vegetation bag, and then fix the vegetation bag to the surface of the waste dump through anchoring.

[0004] Since most of the waste dumps are loose soil-rock mixtures, the accumulation structure is loose and the pores are large, the traditional method of laying natural soil as a vegetation substrate is prone to cause the nutrients of the substrate to quickly infiltrate and lose through the pores of the waste with rainwater, which is not conducive to the long-term stable growth of vegetation. Moreover, the substrate is laid directly on the surface of the waste, and the long-term sunshine increases the surface temperature of the waste, strengthens the transpiration inside the substrate, and accelerates water loss, which is not conducive to the later maintenance of vegetation, especially in arid areas with scarce rainfall, and the cost of watering and maintenance increases significantly. In addition, due to the presence of large pores in the waste dump, the consumption of natural soil is also correspondingly high.

[0005] Although the commonly used vegetation bag technology can solve the problem of nutrient loss in the vegetation growth substrate and increased soil consumption to a certain extent, the vegetation bags directly laid on the surface of the waste slag cannot block the heat conduction of the rock slope, especially in arid areas with sparse rainfall and strong sunshine. The vegetation bag technology has the disadvantage of poor moisture retention and heat insulation. In addition, the existing vegetation bag technology also has the following problems: first, the traditional vegetation bags with a single bag body have the problem that the contents are too thick and the seeds are difficult to germinate, and the contents are too thin and the plants are insufficient in the later stage of nutrition supply; although the partitioned vegetation bag can separate the seed soil and the growth substrate, the surrounding interlayer is filled with soil mixed with plant seeds, which will cause seed waste on the sides and bottom, and the wood pulp paper, coconut fiber net, etc. used for the partition seriously hinder the flow of nutrients between the seed layer and the growth layer.

[0006] There are also technical solutions in the prior art that solve the problem of poor moisture retention and heat insulation of common vegetation bags after laying by setting a water-retaining and heat-insulating layer at the bottom of the vegetation bag, and laying the water-retaining and heat-insulating layer on the surface of the waste dump, but because the vegetation bags are mostly laid on the slope of the waste dump, it is difficult for the vegetation bags on the slope to effectively intercept rainwater during short-term heavy rainfall, which easily causes waste of water resources, especially for arid areas. Although there are also structures that intercept precipitation by setting diversion ditches and water storage tanks, the intercepted precipitation needs secondary irrigation before it can be used, which is not only complex in structure, but also has high later costs.

[0007] In view of this, it is particularly urgent to develop an ecological restoration device for abandoned slag sites in arid areas with simple structure, high precipitation utilization rate, good moisture retention and heat insulation, high vegetation survival rate and long life. Utility Model Content

[0008] In view of the deficiencies in the prior art, the utility model provides an ecological restoration structure for arid area waste dumps which has a simple structure, high precipitation utilization rate, good moisture retention and heat insulation properties, high vegetation survival rate and long service life.

[0009] The utility model is implemented as follows: it comprises a multi-cavity vegetation bag I and a multi-cavity vegetation bag II, the slope surface of the arid area waste dump is longitudinally spaced with a plurality of transversely extending strips or hemispherical grooves, the multi-cavity vegetation bag I and the multi-cavity vegetation bag II are both bag-shaped structures filled with substrates and seeds, a plurality of multi-cavity vegetation bags I are laid flatly on the slope surface of the arid area waste dump outside the strips or hemispherical grooves, a plurality of multi-cavity vegetation bags II are embedded in the strips or hemispherical grooves of the arid area waste dump, the top chamber of the multi-cavity vegetation bag I and the top of the multi-cavity vegetation bag II are respectively filled with a mixture of plant seeds and vegetation germination substrates, the bottom chambers of the multi-cavity vegetation bag I and the multi-cavity vegetation bag II are respectively filled with vegetation moisture-retaining cotton, and the middle chambers of the multi-cavity vegetation bag I and the multi-cavity vegetation bag II are respectively filled with vegetation growth substrates.

[0010] Furthermore, the multi-cavity vegetation bag II is semi-cylindrically embedded in the strip groove or hemispherically embedded in the hemispherical pit groove. The multi-cavity vegetation bag II includes a bag body bottom layer II and a separation layer II. At least two separation layers II are arranged above the bag body bottom layer II. The edges of the separation layer II are connected to the edges of the bag body bottom layer II to form a bag-like structure. A moisture-retaining and heat-insulating cavity II filled with vegetation moisture-retaining cotton is formed between the bag body bottom layer II and the bottom separation layer II. A vegetation growth cavity II filled with vegetation growth substrate is formed between adjacent separation layers II. The top separation layer II of the multi-cavity vegetation bag II embedded in the strip groove or hemispherical pit groove is filled with a mixture layer of plant seeds and vegetation germination substrate.

[0011] Furthermore, the multi-cavity vegetation bag I is a rectangular bag-shaped structure and includes a bag body bottom layer I, a separation layer I, and a bag body surface layer I. The edges of the bag body bottom layer I and the bag body surface layer I are connected to each other to form a hollow bag body. At least two layers of separation layers I are arranged in the bag body, and the edges of the separation layers I are connected to the edges of the bag body. A moisture-retaining and heat-insulating cavity I filled with vegetation moisture-retaining cotton is formed between the bag body bottom layer I and the bottom separation layer I. A vegetation growth cavity I filled with vegetation growth substrate is formed between adjacent separation layers I. A seed planting cavity I filled with a mixture of plant seeds and vegetation germination substrate is formed between the bag body surface layer I and the top separation layer I.

[0012] Furthermore, the thickness of the moisturizing and heat-insulating cavity I and the moisturizing and heat-insulating cavity II after being filled with vegetation moisturizing cotton is 2 to 5 cm, the thickness of the vegetation growth cavity I after being filled with vegetation growth substrate is 20 to 30 cm, the thickest thickness of the vegetation growth cavity II after being filled with vegetation growth substrate is 20 to 30 cm, the thickness of the seed planting cavity I after being filled with a mixture of plant seeds and vegetation germination substrate is 3 to 6 cm, and the thickest thickness of the mixture layer is 3 to 6 cm.

[0013] Furthermore, the length of the multi-cavity vegetation bag I is 80-90 cm, the width is 40-50 cm and the thickness is 25-41 cm, and the cross-sectional radius of the multi-cavity vegetation bag II embedded in the hemispherical groove is 25-41 cm.

[0014] Furthermore, the cross section of the strip groove is a semicircular structure, and the hemispherical groove is composed of a plurality of hemispherical grooves connected end to end in a transverse direction.

[0015] Furthermore, the bag body bottom layer I and the bag body bottom layer II are respectively made of HDPE anti-seepage geomembranes, the separation layer I and the separation layer II are respectively made of non-woven cotton fiber cloths, the bag body surface layer I is made of PET or PP non-woven geotextiles, and the vegetation moisturizing cotton is composed of one or more layers of super absorbent fibers stacked together.

[0016] Furthermore, a plurality of through holes are punched at intervals on the surface layer I of the bag body, and the surface of the mixture layer of the multi-cavity vegetation bag II embedded in the strip grooves or hemispherical grooves is not higher than the surface of the slope.

[0017] Furthermore, the edges of the separation layer I and the edges of the separation layer I and the adjacent bag body bottom layer I and bag body surface layer I are connected by sewing or bonding, and the edges of the separation layer II and the edges of the separation layer II and the bag body bottom layer II are connected by sewing or bonding.

[0018] Furthermore, the mixture layer and the vegetation germination substrate of the seed planting cavity I are the same, the vegetation growth substrate of the vegetation growth cavity I and the vegetation growth cavity II are the same, and the vegetation moisturizing cotton of the moisturizing and heat-insulating cavity I and the moisturizing and heat-insulating cavity II are the same.

[0019] Beneficial effects of the utility model:

[0020] 1. The utility model arranges a plurality of transversely extending strips or hemispherical grooves at longitudinal intervals on the slope of the waste dump, lays a multi-cavity vegetation bag I on the slope, and embeds a multi-cavity vegetation bag II in the strips or hemispherical grooves. The functional sub-cavities of the multi-cavity vegetation bag I and the multi-cavity vegetation bag II and the fillings filled therein can not only meet the nutrient requirements of the vegetation germination stage and the long-term growth stage, but also the vegetation bag can prevent the fillings therein from being gradually lost due to dust, water scouring and infiltration, thereby reducing the consumption of the vegetation substrate, and finally forming a long-term and stable repair effect. In addition, through the cooperation of different multi-cavity vegetation bags with the slope and the strips or hemispherical grooves, the problems of high maintenance cost and low vegetation survival rate caused by scarce rainfall and strong sunshine in arid areas are overcome.

[0021] 2. The utility model adopts an embedded + surface-laid ecological restoration structure, by arranging a plurality of transversely extending strips or hemispherical grooves at longitudinal intervals on the slope, and embedding multi-cavity vegetation bags II in the strips or hemispherical grooves. Since the strips or hemispherical grooves extend transversely and the surface of the multi-cavity vegetation bag II therein is not higher than the slope surface, it can effectively intercept the overflow that the multi-cavity vegetation bag I on the slope cannot absorb during short-term heavy rainfall, and in combination with the vegetation moisturizing cotton filled in the bottom chamber of the multi-cavity vegetation bag II, the water storage capacity is greatly improved, which can not only significantly improve the precipitation utilization rate in arid areas, but also the intercepted precipitation can be gradually released through the vegetation moisturizing cotton for use by plants without artificial watering, and the vegetation moisturizing cotton at the bottom of the multi-cavity vegetation bag I and the multi-cavity vegetation bag II also improves the moisture-keeping and heat-insulating properties of the substrate, thereby effectively improving the vegetation survival rate after ecological restoration.

[0022] In summary, the utility model has the characteristics of simple structure, high precipitation utilization rate, good moisture retention and heat insulation, high vegetation survival rate and long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional schematic diagram of the utility model;

[0024] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0025] Figure 3 for Figure 2 A partial enlarged view of

[0026] Figure 4 This is a schematic diagram of the moisturizing principle of the utility model;

[0027] In the figure: 1-multi-cavity vegetation bag Ⅰ, 11-bag bottom layer Ⅰ, 12-partition layer Ⅰ, 13-bag surface layer Ⅰ, 14-moisture-retaining and heat-insulating cavity Ⅰ, 15-vegetation growth cavity Ⅰ, 16-seed planting cavity Ⅰ, 2-multi-cavity vegetation bag Ⅱ, 21-bag bottom layer Ⅱ, 22-partition layer Ⅱ, 24-moisture-retaining and heat-insulating cavity Ⅱ, 25-vegetation growth cavity Ⅱ, 26-mixture layer, 3-slope, 31-hemispherical pits and grooves, 4-vegetation, 5-precipitation, 6-water flow direction. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but the present invention is not limited in any way. Any changes or improvements made based on the teachings of the present invention belong to the protection scope of the present invention.

[0029] It should be noted that the terms "upper", "lower", "front", "back", "left", "right", "longitudinal", "lateral", "adjacent", "bottom layer", "top layer" and the like in the present invention indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0030] like Figures 1 to 4 As shown, the utility model comprises a multi-cavity vegetation bag Ⅰ1 and a multi-cavity vegetation bag Ⅱ2. The slope surface 3 of the arid area waste dump is longitudinally spaced with a plurality of transversely extending strips or hemispherical grooves 31. The multi-cavity vegetation bag Ⅰ1 and the multi-cavity vegetation bag Ⅱ2 are both bag-like structures filled with substrates and seeds. A plurality of multi-cavity vegetation bags Ⅰ1 are laid flat on the slope surface 3 of the arid area waste dump outside the strips or hemispherical grooves 31, and a plurality of multi-cavity vegetation bags Ⅱ2 are embedded in the strips or hemispherical grooves 31 of the arid area waste dump. The top chamber of the multi-cavity vegetation bag Ⅰ1 and the top of the multi-cavity vegetation bag Ⅱ2 are respectively filled with a mixture of plant seeds and vegetation germination substrates, the bottom chambers of the multi-cavity vegetation bag Ⅰ1 and the multi-cavity vegetation bag Ⅱ2 are respectively filled with vegetation moisturizing cotton, and the middle chambers of the multi-cavity vegetation bag Ⅰ1 and the multi-cavity vegetation bag Ⅱ2 are respectively filled with vegetation growth substrates.

[0031] The multi-cavity vegetation bag I1 is laid flat on the entire slope except the strip groove or hemispherical groove 31, and the multi-cavity vegetation bag II2 is laid end to end in the strip groove or embedded in the hemispherical groove 31.

[0032] The multi-cavity vegetation bag II2 is semi-cylindrical and embedded in the strip groove or hemispherical and embedded in the hemispherical groove 31. The multi-cavity vegetation bag II2 includes a bag body bottom layer II21 and a separation layer II22. At least two layers of separation layers II22 are arranged above the bag body bottom layer II21. The edges of the separation layers II22 are connected to the edges of the bag body bottom layer II21 to form a bag-like structure. A moisture-retaining and heat-insulating cavity II24 filled with vegetation moisture-retaining cotton is formed between the bag body bottom layer II21 and the bottom separation layer II22. A vegetation growth cavity II25 filled with vegetation growth substrate is formed between adjacent separation layers II22. The top separation layer II22 of the multi-cavity vegetation bag II2 embedded in the strip groove or hemispherical groove 31 is filled with a mixture layer 26 of plant seeds and vegetation germination substrate.

[0033] The multi-cavity vegetation bag Ⅰ1 is a rectangular bag-shaped structure and includes a bag body bottom layer Ⅰ11, a separation layer Ⅰ12, and a bag body surface layer Ⅰ13. The edges of the bag body bottom layer Ⅰ11 and the bag body surface layer Ⅰ13 are connected to each other to form a hollow bag body. At least two layers of separation layers Ⅰ12 are arranged in the bag body at intervals, and the edges of the separation layers Ⅰ12 are connected to the edges of the bag body. A moisture-retaining and heat-insulating cavity Ⅰ14 filled with vegetation moisture-retaining cotton is formed between the bag body bottom layer Ⅰ11 and the bottom separation layer Ⅰ12. A vegetation growth cavity Ⅰ15 filled with vegetation growth substrate is formed between adjacent separation layers Ⅰ12. A seed planting cavity Ⅰ16 filled with a mixture of plant seeds and vegetation germination substrate is formed between the bag body surface layer Ⅰ13 and the top separation layer Ⅰ12.

[0034] The thickness of the moisture-retaining and heat-insulating cavity I14 and the moisture-retaining and heat-insulating cavity II24 after being filled with vegetation moisture-retaining cotton is 2 to 5 cm, the thickness of the vegetation growth cavity I15 after being filled with vegetation growth substrate is 20 to 30 cm, the thickest thickness of the vegetation growth cavity II25 after being filled with vegetation growth substrate is 20 to 30 cm, the thickness of the seed planting cavity I16 after being filled with a mixture of plant seeds and vegetation germination substrate is 3 to 6 cm, and the thickest thickness of the mixture layer 26 is 3 to 6 cm.

[0035] The multi-cavity planting bag Ⅰ1 has a length of 80 to 90 cm, a width of 40 to 50 cm and a thickness of 25 to 41 cm. The cross-sectional radius of the multi-cavity planting bag Ⅱ2 embedded in the groove or hemispherical groove 31 is 25 to 41 cm.

[0036] The cross section of the strip groove is a semicircular structure, and the hemispherical groove 31 is composed of a plurality of hemispherical grooves connected end to end in a transverse direction.

[0037] The bag body bottom layer I11 and the bag body bottom layer II21 are respectively made of anti-seepage geomembranes made of HDPE (high-density polyethylene), the separation layer I12 and the separation layer II22 are respectively made of non-woven cotton fiber cloth, the bag body surface layer I13 is made of non-woven geotextile made of PET (polyethylene terephthalate) or PP (polypropylene), and the vegetation moisturizing cotton is composed of one or more layers of super absorbent fiber (PSA) stacked together.

[0038] The surface density of the super absorbent fiber is 100 to 500 g / m 2 , thickness 0.3~3cm, water absorption capacity is about 6 times that of cotton or 7 times that of nylon, and the water absorption capacity within 15 seconds can reach 70~100 times of its own weight; the vegetation moisturizing cotton can be reused after being squeezed by external force after absorbing water, and the water is not easy to flow out automatically; it has good moisture absorption and release properties, moisturizing and heat insulation in summer, and warm and antifreeze in winter. The non-woven geotextile has high-strength anti-ultraviolet, acid and alkali resistance, corrosion resistance, and anti-freeze and thaw functions. It can last for 70 years without degradation and has a long service life, so it can effectively provide long-term storage space for vegetation substrates and provide stable material conditions for long-term vegetation growth. The anti-seepage geomembrane has the characteristics of aging resistance and high strength, and its permeability coefficient is less than 1×10 -13 cm / s, effectively preventing water and nutrients in the plant growing device from seeping and losing. The partition layer I12 and the partition layer II22 made of non-woven cotton fiber cloth divide the space of the plant growing bag, and also have the function of being water-permeable but not soil-permeable and being permeable to plant roots.

[0039] The bag body surface layer Ⅰ13 is provided with a plurality of through holes at intervals, and the surface of the mixture layer 26 of the multi-cavity planting bag Ⅱ2 embedded in the strip groove or hemispherical groove 31 is not higher than the surface of the slope surface 3.

[0040] The edges of the separation layer Ⅰ12 and the edges of the separation layer Ⅰ12 and the adjacent bag body bottom layer Ⅰ11 and bag body surface layer Ⅰ13 are connected by sewing or bonding, and the edges of the separation layer Ⅱ22 and the edges of the separation layer Ⅱ22 and the bag body bottom layer Ⅱ21 are connected by sewing or bonding.

[0041] Direction marks are arranged on the surfaces of the bag body surface layer Ⅰ13 and / or the bag body bottom layer Ⅰ11 and the bag body bottom layer Ⅱ21.

[0042] The mixture layer 26 is the same as the vegetation germination substrate of the seed planting cavity Ⅰ16, the vegetation growth substrate of the vegetation growth cavity Ⅰ15 is the same as the vegetation growth substrate of the vegetation growth cavity Ⅱ25, and the vegetation moisturizing cotton of the moisturizing and heat-insulating cavity Ⅰ14 is the same as the vegetation moisturizing and heat-insulating cavity Ⅱ24.

[0043] The vegetation seeds in the mixture layer 26 and the seed planting cavity Ⅰ16 are herbaceous plant seeds and / or woody plant seeds, and the herbaceous plant seeds are one or more of wheatgrass, foxtail grass, and fescue.

[0044] The vegetation germination substrate is composed of natural soil or improved waste residue fine particles added with additives such as organic fertilizer, granulating agent, plant fiber, water retaining agent, etc. The main characteristics of the substrate are loose structure and good air permeability, which is conducive to seed germination.

[0045] The vegetation growth substrate is natural soil or improved waste residue fine particles added with compound fertilizers such as nitrogen, phosphorus and potassium, which is characterized by high nutritional content and can provide long-term nutritional needs for plant growth.

[0046] The granular agent and water retaining agent are commercially available mature greening commercial preparations.

[0047] The compound fertilizer is commercially available garden compound fertilizer, and the organic fertilizer is fermented straw, pig manure, cow manure, chicken manure or any combination thereof.

[0048] The above is only a preferred specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. An ecological restoration structure for a waste dump in arid areas, characterized in that The invention comprises a multi-cavity vegetation bag I (1) and a multi-cavity vegetation bag II (2), wherein a plurality of transversely extending strip grooves or hemispherical grooves (31) are longitudinally arranged at intervals on the slope surface (3) of the arid area waste dump, and the multi-cavity vegetation bag I (1) and the multi-cavity vegetation bag II (2) are both bag-shaped structures filled with substrates and seeds, and a plurality of multi-cavity vegetation bags I (1) are laid flatly on the slope surface (3) of the arid area waste dump outside the strip grooves or hemispherical grooves (31), and the arid area waste dump is provided with a plurality of multi-cavity vegetation bags I (1) which are fitted with each other. A plurality of multi-cavity vegetation bags II (2) are embedded in the grooves or hemispherical grooves (31) of the field. The top chamber of the multi-cavity vegetation bag I (1) and the top of the multi-cavity vegetation bag II (2) are respectively filled with a mixture of plant seeds and vegetation germination substrates, the bottom chambers of the multi-cavity vegetation bag I (1) and the multi-cavity vegetation bag II (2) are respectively filled with vegetation moisture-retaining cotton, and the middle chambers of the multi-cavity vegetation bag I (1) and the multi-cavity vegetation bag II (2) are respectively filled with vegetation growth substrates.

2. The ecological restoration structure of the waste dump in arid areas according to claim 1 is characterized in that The multi-cavity vegetation bag II (2) is semi-cylindrical and embedded in the strip groove or hemispherical and embedded in the hemispherical groove (31). The multi-cavity vegetation bag II (2) comprises a bag body bottom layer II (21) and a separation layer II (22). At least two separation layers II (22) are arranged above the bag body bottom layer II (21). The edges of the separation layers II (22) are connected to the edges of the bag body bottom layer II (21) to form a bag-like structure. A moisture-insulating cavity II (24) filled with vegetation moisture-proof cotton is formed between the bag body bottom layer II (21) and the separation layer II (22) of the bottom layer. A vegetation growth cavity II (25) filled with vegetation growth substrate is formed between adjacent separation layers II (22). The top of the top separation layer II (22) of the multi-cavity vegetation bag II (2) embedded in the strip groove or hemispherical groove (31) is filled with a mixture layer (26) of plant seeds and vegetation germination substrate.

3. The ecological restoration structure of the waste dump in arid areas according to claim 2 is characterized in that The multi-cavity vegetation bag I (1) is a rectangular bag-shaped structure and comprises a bag bottom layer I (11), a separation layer I (12), and a bag surface layer I (13). The edges of the bag bottom layer I (11) and the bag surface layer I (13) are connected to each other to form a hollow bag body. At least two layers of separation layers I (12) are arranged in the bag body at intervals. The edges of the separation layers I (12) are connected to the edges of the bag body. A moisture-insulating cavity I (14) filled with vegetation moisture-proof cotton is formed between the bag bottom layer I (11) and the bottom separation layer I (12). A vegetation growth cavity I (15) filled with vegetation growth substrate is formed between adjacent separation layers I (12). A seed planting cavity I (16) filled with a mixture of plant seeds and vegetation germination substrate is formed between the bag surface layer I (13) and the top separation layer I (12).

4. The ecological restoration structure of the waste dump in arid areas according to claim 3 is characterized in that The thickness of the moisture-insulating cavity I (14) and the moisture-insulating cavity II (24) after being filled with vegetation moisture-insulating cotton is 2 to 5 cm, the thickness of the vegetation growth cavity I (15) after being filled with vegetation growth substrate is 20 to 30 cm, the thickness of the vegetation growth cavity II (25) after being filled with vegetation growth substrate is 20 to 30 cm at its thickest point, the thickness of the seed planting cavity I (16) after being filled with a mixture of plant seeds and vegetation germination substrate is 3 to 6 cm, and the thickness of the mixture layer (26) at its thickest point is 3 to 6 cm.

5. The ecological restoration structure of the waste dump in arid areas according to claim 4 is characterized in that The multi-cavity planting bag I (1) has a length of 80 to 90 cm, a width of 40 to 50 cm and a thickness of 25 to 41 cm. The cross-sectional radius of the multi-cavity planting bag II (2) embedded in the groove or hemispherical groove (31) is 25 to 41 cm.

6. The ecological restoration structure of the waste dump in arid areas according to claim 3, 4 or 5, characterized in that The cross section of the strip groove is a semicircular structure, and the hemispherical groove (31) is composed of a plurality of hemispherical grooves connected end to end in a transverse direction.

7. The ecological restoration structure of the waste dump in arid areas according to claim 6 is characterized in that The bag body bottom layer I (11) and the bag body bottom layer II (21) are respectively made of an impermeable geomembrane made of HDPE material, the separation layer I (12) and the separation layer II (22) are respectively made of a non-woven cotton fiber cloth, the bag body surface layer I (13) is made of a non-woven geotextile made of PET or PP material, and the vegetation moisturizing cotton is composed of one or more layers of super absorbent fibers stacked together.

8. The ecological restoration structure of the waste dump in arid areas according to claim 6 is characterized in that The bag body surface layer I (13) is provided with a plurality of through holes at intervals, and the surface of the mixture layer (26) of the multi-cavity planting bag II (2) embedded in the strip groove or hemispherical groove (31) is not higher than the surface of the slope surface (3).

9. The ecological restoration structure of the waste dump in arid areas according to claim 8 is characterized in that The edges of the separation layer I (12) and the edges of the separation layer I (12) and the adjacent bag body bottom layer I (11) and bag body surface layer I (13) are connected by sewing or bonding, and the edges of the separation layer II (22) and the edges of the separation layer II (22) and the bag body bottom layer II (21) are connected by sewing or bonding.

10. The ecological restoration structure of the waste dump in arid areas according to claim 8 is characterized in that The mixture layer (26) and the vegetation germination substrate of the seed planting cavity I (16) are the same, the vegetation growth substrate of the vegetation growth cavity I (15) and the vegetation growth cavity II (25) are the same, and the vegetation moisturizing cotton of the moisturizing and heat-insulating cavity I (14) and the moisturizing and heat-insulating cavity II (24) are the same.

Images