Method for rapid reclamation of topsoil in high water level coal mining subsidence area by surface filling

Abstract

The application discloses a method for rapidly realizing high-potential-subsidence-area surface filling and reclamation of soil, and relates to the technical field of land reclamation, which comprises the following steps: S1, determining the position and area of the reclamation area to be filled; determining the filling thickness; S2, according to the area of the reclamation area to be filled and the surface form, the reclamation area to be filled is divided into a plurality of strip-shaped reclamation areas; then the filling direction is determined; S3, first, the odd strip-shaped reclamation areas are filled, the bottom mud mixture of the accumulated water area is extracted, and then the top area, the slope area and the bottom area of the strip-shaped reclamation area are filled in sequence, and the stack layer is arranged on the odd strip-shaped reclamation areas after the filling is completed; S4, the remaining even strip-shaped reclamation areas are prepared to be filled, and the stack layer on the odd strip-shaped reclamation areas filled previously can be used as filling raw materials for filling, until all the strip-shaped reclamation areas are completely filled. The application can shorten the reclamation period and reduce the reclamation cost.

Description

Technical Field

[0001] This invention relates to the field of land reclamation technology, and in particular to a method for rapidly reclamating and restoring soil in coal mining subsidence areas with high groundwater levels. Background Technology

[0002] Due to the large subsidence in the coal mining subsidence area, the surface elevation is significantly lower than the surrounding / original surface elevation. Its reclamation requires a large amount of filling material to raise the surface elevation in order to meet the requirements for reclamation of arable land and coordinate with the surrounding elevation.

[0003] Existing filling materials include gangue, fly ash, construction waste, and purchased soil, but these present problems such as large project scale, complex treatment, high cost, and certain pollution risks.

[0004] Therefore, there is an urgent need in this field for a method to quickly achieve surface backfilling and reclamation of coal mining subsidence areas with high groundwater levels, in order to solve the above-mentioned problems. Summary of the Invention

[0005] The purpose of this invention is to provide a method for rapidly reclaiming and filling the surface of coal mining subsidence areas with high groundwater levels into soil, thereby solving the technical problems existing in the prior art, significantly shortening the reclamation cycle, effectively increasing the land reclamation rate, and significantly reducing reclamation costs.

[0006] To achieve the above objectives, the present invention provides the following solution:

[0007] This invention discloses a method for rapidly reclaiming and filling the surface of coal mining subsidence areas with high groundwater levels, comprising the following steps:

[0008] S1. Determine the location and area of ​​the area to be filled and reclaimed based on the area of ​​the coal mining subsidence basin, the subsidence depth, the area and depth of the water accumulation area within the basin, and the amount of usable bottom sediment; determine the filling thickness comprehensively based on the remaining subsidence of the area to be filled and reclaimed, the bottom sediment soil compression ratio, the groundwater level, and the elevation of the surrounding non-subsidence area.

[0009] S2. Based on the area and surface morphology of the area to be reclaimed, the area to be reclaimed is divided into multiple strip-shaped reclamation areas and numbered sequentially; then the filling direction is determined, and filling is carried out from the farthest point from the waterlogged area to the nearest point.

[0010] S3. First, fill the odd or even number of strip reclamation areas. Extract the bottom mud mixture from the water accumulation area in the coal mining subsidence area with high water level and then fill the top, bottom and bottom areas of the strip reclamation area in sequence. After the odd or even number of strip reclamation areas are filled, set up a load layer on top of them.

[0011] S4. Prepare to fill the remaining even or odd number of strip reclamation areas. The surcharge layer on the previously filled odd or even number of strip reclamation areas can be used as filling material until all strip reclamation areas are completely filled.

[0012] Preferably, in step S2, before filling the top, bottom, or slope areas, an isolation wall is set at the edge of the top, bottom, or slope areas.

[0013] Preferably, the partition wall is made of steel plate or fly ash silicate block.

[0014] Preferably, in step S2, before filling the topsoil in the slope top area, slope area or slope bottom area, the topsoil is stripped first, and after all the strip reclamation areas are filled, the topsoil is backfilled.

[0015] Preferably, in step S2, the filling process for the top of the slope includes: first, drilling several gravel wells on the surface of the top of the slope; then, laying a gravel layer on the surface; covering the gravel layer with a gravel permeable membrane; filling the gravel permeable membrane with a mixture of bottom mud extracted from the water accumulation area; filling to the designed thickness to form a top filling layer; drilling several gravel wells in the top filling layer; and covering the top filling layer with a gravel permeable membrane.

[0016] A load layer can be installed on the permeable membrane filled at the top of the slope.

[0017] Preferably, the diameter of the gravel well at the top of the slope is 0.9-1.5cm, and the gravel well at the top of the slope is filled with gravel with a diameter of 0.2-5mm;

[0018] The thickness of the gravel layer at the top of the slope is 0.5m, and the gravel layer at the top of the slope is filled with gravel of 0.2-5mm.

[0019] The thickness of the infill layer at the top of the slope is 0.6m;

[0020] The diameter of the sand filling well at the top of the slope is 9-15cm, and the well is filled with sand and gravel with a diameter of 0.2-5mm.

[0021] Preferably, in step S2, the filling process of the sloping area includes: laying a sloping gravel layer on the ground surface, laying sloping drainage pipes in the sloping gravel layer, covering the sloping gravel layer with a sloping gravel permeable membrane, filling the sloping gravel permeable membrane with a sloping filling layer, drilling several sloping filling sand wells in the sloping filling layer, and covering the upper end of the sloping filling layer with a sloping filling permeable membrane.

[0022] The upper part of the permeable membrane used for filling slopes can be filled with a surcharge layer.

[0023] Preferably, the thickness of the gravel layer on the slope is 0.5m, and the gravel layer on the slope is made up of gravel with a thickness of 0.2-5mm.

[0024] The drainage pipes for the sloping land are PVC pipes with a diameter of 10cm;

[0025] The thickness of the slope filling layer is 2m;

[0026] The diameter of the sand filling wells on slopes is 9-15cm, and the wells are filled with gravel with a diameter of 0.2-5mm.

[0027] Preferably, in step S2, the filling process for the slope bottom area includes: laying a slope bottom gravel layer on the ground surface, laying a slope bottom drainage pipe in the slope bottom gravel layer, covering the slope bottom gravel layer with a slope bottom gravel permeable membrane, filling the slope bottom filling layer on the slope bottom gravel permeable membrane, drilling several slope bottom filling sand wells in the slope bottom filling layer, and covering the upper end of the slope bottom filling layer with a slope bottom filling permeable membrane.

[0028] The upper part of the permeable membrane at the bottom of the slope can be filled with a surcharge layer.

[0029] Preferably, the thickness of the gravel layer at the bottom of the slope is 0.5m, and the gravel layer at the bottom of the slope is composed of gravel with a thickness of 0.2-5mm.

[0030] The drainage pipe at the bottom of the slope is a PVC pipe with a diameter of 10cm;

[0031] The thickness of the slope bottom filling layer is 2m;

[0032] The diameter of the sand filling well at the bottom of the slope is 9-15cm, and the well is filled with sand and gravel with a diameter of 0.2-5mm.

[0033] The present invention achieves the following technical effects compared to the prior art:

[0034] This invention utilizes a dredger to extract bottom mud mixture from the waterlogged area of ​​a coal mining subsidence zone with a high groundwater level, and transports it to the same or adjacent subsidence basin to be filled and reclaimed. Through different drainage processes, soil can be quickly formed, which can significantly shorten the reclamation cycle, effectively improve the land reclamation rate, and significantly reduce the reclamation cost. At the same time, it can maximize the protection and restoration of arable land and establish a good "grain above, fish below" ecological model. Attached Figure Description

[0035] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0036] Figure 1A cross-sectional view of a coal mining subsidence basin, illustrating the method for rapidly implementing surface backfilling and reclamation in high-water-level coal mining subsidence areas according to an embodiment of the present invention.

[0037] Figure 2 A top view of a coal mining subsidence basin, representing an embodiment of the present invention, illustrating the method for rapidly realizing surface filling and reclamation of coal mining subsidence areas with high groundwater levels.

[0038] Figure 3 This is a schematic diagram of the reclamation area zoning in the method for rapid surface filling and reclamation of coal mining subsidence areas at high groundwater levels, as described in this embodiment of the invention.

[0039] Figure 4 This invention provides a method for rapidly realizing the backfilling and reclamation of soil in the top slope area in a coal mining subsidence area with high groundwater level.

[0040] Figure 5 This invention provides a method for rapidly realizing soil filling and reclamation profiles in sloping areas within a high-water-level coal mining subsidence zone.

[0041] Figure 6 This invention provides a method for rapidly realizing the soil filling and reclamation profile of the slope bottom area in a high-water-level coal mining subsidence area.

[0042] In the diagram: 1-Slope top area; 101-Slope top gravel layer; 1011-Slope top gravel well; 102-Slope top gravel permeable membrane; 103-Slope top filling layer; 1031-Slope top filling well; 104-Slope top filling permeable membrane; 2-Slope area; 201-Slope gravel layer; 2011-Slope drainage pipe; 202-Slope gravel permeable membrane; 203-Slope filling layer; 2031-Slope filling well; 204-Slope filling permeable membrane; 3-Slope bottom area; 301-Slope bottom gravel layer; 3011-Slope bottom drainage pipe; 302-Slope bottom gravel permeable membrane; 303-Slope bottom filling layer; 3031-Slope bottom filling well; 304-Slope bottom filling permeable membrane; 4-Waterlogged area; 5-Strip-shaped reclamation area. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] The purpose of this invention is to provide a method for rapidly reclaiming and filling the surface of coal mining subsidence areas with high groundwater levels into soil, thereby solving the technical problems existing in the prior art, significantly shortening the reclamation cycle, effectively increasing the land reclamation rate, and significantly reducing reclamation costs.

[0045] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] like Figures 1-6 As shown in the figure, this embodiment provides a method for rapidly realizing surface backfilling and reclamation of land in coal mining subsidence areas with high groundwater levels, including the following steps:

[0047] S1. Based on the area of ​​the coal mining subsidence basin, the subsidence depth, the area and depth of the water-filled area within the basin, and the amount of usable bottom sediment, determine the location and area of ​​the area to be filled and reclaimed. In addition, based on the remaining subsidence of the area to be filled and reclaimed, the soil compression ratio of the bottom sediment, the groundwater level, and the elevation of the surrounding non-subsidence areas, comprehensively determine the filling thickness.

[0048] S2. Based on the area and surface morphology of the area to be reclaimed, the area is divided into multiple strip-shaped reclamation zones 5. The length of each strip-shaped reclamation zone 5 extends from the base area 3 to the top area 1, meaning each strip-shaped reclamation zone 5 includes the base area 3, the slope area 2, and the top area 1 (except for special terrain features). Each strip-shaped reclamation zone 5 is generally a rectangular strip, 100-200m long and 25-50m wide. These strip-shaped reclamation zones 5 are then sequentially numbered, such as... Figure 3 As shown, number them I, II, III, IV...N. Then determine the filling direction, as follows: Figure 2 As shown, filling can be carried out from 4 meters away from the waterlogged area, or from high to low according to the surface elevation. The general direction of these two methods is the same, but the direction can be adjusted according to the actual situation when encountering special terrain.

[0049] S3. First, fill the odd or even number of strip reclamation areas 5. In this embodiment, fill the odd number (i.e., I, III...) first. Extract the bottom mud mixture from the water accumulation area 4 in the coal mining subsidence area with high water level and then fill the top area 1, the slope area 2 and the bottom area 3 in the strip reclamation area 5 in sequence (i.e., fill from far to near the water accumulation area 4). After the odd number of strip reclamation areas 5 are filled, set up a load layer on top of them.

[0050] S4. Prepare to fill the remaining even-numbered strip reclamation areas 5. The surcharge layer on the previously filled odd-numbered or even-numbered strip reclamation areas 5 can be used as filling material until all strip reclamation areas 5 are completely filled. It should be noted that in the actual filling process, the even-numbered strip reclamation areas 5 can also be filled first, and then the odd-numbered strip reclamation areas 5 can be filled. Although the order is different, the actual effect is the same as that of this embodiment.

[0051] In this embodiment, in step S2, before filling the top slope area 1, the slope area 2, or the bottom slope area 3, isolation walls are set at the edges of the top slope area 1, the slope area 2, or the bottom slope area 3 to divide the various areas.

[0052] In this embodiment, the isolation wall is made of steel plate or fly ash silicate blocks. Impermeable steel plates can be used as temporary walls, which have the advantage of being easily removable in case of emergencies. In this embodiment, impermeable steel plates are used as temporary walls. Ecological materials such as fly ash silicate blocks can serve as permanent walls, providing a robust structure that requires no further reinforcement. While impermeable steel plates are used as temporary walls in this embodiment, those skilled in the art can choose the appropriate method based on specific circumstances.

[0053] In this embodiment, in step S2, before filling the topslope area 1, slope area 2, or bottomslope area 3, the topsoil is stripped. In this embodiment, 0.3m of topsoil is stripped and temporarily stored properly. After all the strip reclamation areas 5 are filled, the topsoil is then backfilled to reveal the original landform.

[0054] In this embodiment, as Figure 4 As shown, the complete construction process for the slope crest region 1 in step S2 is as follows:

[0055] First, focus on the side of the slope top area 1 closest to the water accumulation area 4 (i.e., Figure 1 On the left side of the wall, a retaining wall is erected, and then on the opposite side, the slope is extended to the non-collapsed area (this side does not require a retaining wall because it extends to the edge of the ground). Finally, retaining walls are erected on the remaining two side boundaries to create enclosure. Then, 0.3m of topsoil is stripped and temporarily stored.

[0056] The formal filling process includes first drilling several gravel wells 1011 on the surface of the slope top area 1, drilling from the ground to the first underground sand layer or sand layer. The gravel wells 1011 are set vertically and filled with gravel. Then, the gravel layer 101 is laid on the surface, and the gravel permeable membrane 102 is covered on the gravel layer 101. The bottom mud mixture extracted from the water accumulation area 4 is filled on the gravel permeable membrane 102 to the designed thickness, thus forming the slope top filling layer 103. Several vertically distributed gravel filling wells 1031 are drilled in the gravel filling layer 103. The gravel filling permeable membrane 104 is covered on the gravel filling layer 103. The gravel permeable membrane 102 and the top filling permeable membrane can both be existing one-way permeable membranes, so that water can only flow from top to bottom.

[0057] It should be noted that, for the top slope area 1 of the odd-numbered strip reclamation areas 5 that are filled first, a surcharge layer can be set on the permeable membrane 104 filled at the top slope. Figure 4 The topmost layer in the slope top area 1 has the same material as the top fill layer 103, which is a mixture of bottom mud. The thickness of the top fill layer 103 and the top fill layer 103 in the slope top area 1 are also the same, so that the two have the same volume. The purpose of this arrangement is that when the top fill layer needs to be laid in the slope top area 1 of the adjacent even-numbered strip reclamation area 5, the top fill layer of the adjacent odd-numbered slope top area 1 can be directly laid in the even-numbered slope top area 1 that needs to be laid, thereby improving construction efficiency.

[0058] In this embodiment, the relevant dimensions for the slope crest region 1 are as follows:

[0059] The diameter of the gravel well 1011 at the top of the slope is 0.9-1.5cm, and the gravel well 1011 at the top of the slope is filled with gravel with a diameter of 0.2-5mm.

[0060] The thickness of the gravel layer 101 at the top of the slope is 0.5m, and the gravel layer 101 at the top of the slope is made of gravel with a thickness of 0.2-5mm.

[0061] The thickness of the slope top filling layer 103 is 0.6m. If it is an odd-numbered strip reclamation area 5 that is filled first, then a 0.6m surcharge layer also needs to be set on the top of the slope top area 1.

[0062] The diameter of the sand filling well 1031 at the top of the slope is 9-15cm, and the sand filling well 1031 at the top of the slope is filled with sand and gravel with a diameter of 0.2-5mm.

[0063] In this embodiment, as Figure 5 As shown, the complete construction process for slope area 2 in step S2 is as follows:

[0064] First, set up isolation walls around the sloping area 2, and then peel off 0.3m of topsoil and temporarily store it.

[0065] The formal filling process includes laying a slope gravel layer 201 on the surface, laying a slope drainage pipe 2011 in the slope gravel layer 201, and having multiple permeable holes on the sidewalls of the slope drainage pipe 2011 to receive water from above. Depending on the water volume and slope, a water pump can be installed near the bottom area 3 of the strip reclamation area 5 to pump out the water from the slope drainage pipe 2011. A slope gravel permeable membrane 202 is laid on top of the slope gravel permeable membrane 201, and a slope filling layer 203 is filled on top of the slope gravel permeable membrane 202. Several slope filling sand wells 2031 are drilled in the slope filling layer 203, and a slope filling permeable membrane 204 is laid on top of the slope filling layer 203. Both the slope gravel permeable membrane 202 and the slope filling permeable membrane 204 are existing one-way permeable membranes.

[0066] Similarly, for the sloping area 2 in the odd-numbered strip reclamation areas 5 that are filled first, a surcharge layer can be set on the sloping infill permeable membrane 204. Figure 5 The topmost layer in the structure contains a surcharge layer and a slope filling layer 203, both made of the same material—a mixture of bottom mud—and both have the same volume. This arrangement is intended to improve construction efficiency when an even-numbered strip reclamation area 5 requires a slope filling layer, allowing the surcharge layer at the top of the adjacent odd-numbered slope area 2 to be directly laid within the even-numbered slope area 2. Furthermore, to ensure that the slope filling layer 203 and the surcharge layer at the top of the slope area 2 have the same volume, such as… Figure 5 As shown, the stacking shape of the surcharge layer at the top of the slope area 2 is the same as that of the slope filling layer 203, and is symmetrical about the slope filling permeable membrane 204. This ensures that the volume of the surcharge layer at the top of the slope area 2 is the same as that of the slope filling layer 203 in the actual stacking process.

[0067] In this embodiment, the thickness of the slope gravel layer 201 is 0.5m, and the slope gravel layer 201 is made of gravel with a thickness of 0.2-5mm.

[0068] The 2011 slope drainage pipe is a PVC pipe with a diameter of 10cm.

[0069] The thickness of the thickest side of the slope filling layer 203 is 2m. If there is a surcharge layer above it, the thickest side of the surcharge layer above the slope filling layer 203 is also 2m.

[0070] The diameter of the slope filling sand well 2031 is 9-15cm, and the slope filling sand well 2031 is filled with sand and gravel with a diameter of 0.2-5mm.

[0071] In this embodiment, as Figure 6 As shown, the complete construction process for the slope bottom region 3 in step S2 is as follows:

[0072] First, set up isolation walls around the sloping area 2, and then peel off 0.3m of topsoil and temporarily store it.

[0073] The formal filling process includes laying a slope bottom gravel layer 301 on the surface, laying a slope bottom drainage pipe 3011 in the slope bottom gravel layer 301, and having multiple permeable holes on the side wall of the slope bottom drainage pipe 3011 to receive water from above. Depending on the water volume and slope, a water pump can be set up near the water accumulation area 4 in the strip reclamation area 5 to pump out the water from the slope bottom drainage pipe 3011. A slope bottom gravel permeable membrane 302 is laid on top of the slope bottom gravel permeable membrane 302, and a slope bottom filling layer 303 is filled on top of the slope bottom gravel permeable membrane 302. Several vertical slope bottom filling sand wells 3031 are drilled in the slope bottom filling layer 303, and a slope bottom filling permeable membrane 304 is laid on top of the slope bottom filling layer 303. Both the slope bottom gravel permeable membrane 302 and the slope bottom filling permeable membrane 304 are existing one-way permeable membranes.

[0074] Similarly, for the slope bottom region 3 of the odd-numbered strip reclamation areas 5 that are filled first, a surcharge layer can be set on the slope bottom filling permeable membrane 304. Figure 6 The topmost layer in the slope bottom area 3 contains a surcharge layer and a slope bottom filling layer 303, both of which are bottom mud mixtures. The surcharge layer and the slope bottom filling layer 303 have the same thickness, resulting in identical volumes. This arrangement aims to improve construction efficiency when a slope bottom filling layer needs to be laid in an even-numbered adjacent strip reclamation area 5, allowing the surcharge layer at the top of the adjacent odd-numbered slope bottom area 3 to be directly laid in the even-numbered slope bottom area 3.

[0075] In this embodiment, the thickness of the gravel layer 301 at the bottom of the slope is 0.5m, and the gravel layer 301 at the bottom of the slope is made of gravel with a thickness of 0.2-5mm.

[0076] The 3011 drainage pipe at the bottom of the slope is a PVC pipe with a diameter of 10cm.

[0077] The thickness of the slope bottom filling layer 303 is 2m. If there is a surcharge layer above it, the thickness of the surcharge layer above the slope bottom filling layer 303 is also 2m.

[0078] The diameter of the slope bottom filling sand well 3031 is 9-15cm, and the slope bottom filling sand well 3031 is filled with sand and gravel with a diameter of 0.2-5mm.

[0079] This specification uses specific examples to illustrate the principles and implementation methods of the present invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of the present invention. Furthermore, those skilled in the art will recognize that, based on the ideas of the present invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A method for rapidly reclaiming and restoring soil in coal mining subsidence areas with high groundwater levels, characterized in that, Includes the following steps: S1. Determine the location and area of ​​the area to be filled and reclaimed based on the area of ​​the coal mining subsidence basin, the subsidence depth, the area and depth of the water accumulation area within the basin, and the amount of usable bottom sediment; determine the filling thickness comprehensively based on the remaining subsidence of the area to be filled and reclaimed, the bottom sediment soil compression ratio, the groundwater level, and the elevation of the surrounding non-subsidence area. S2. Based on the area and surface morphology of the area to be reclaimed, the area to be reclaimed is divided into multiple strip-shaped reclamation areas and numbered sequentially; then the filling direction is determined, and filling is carried out from the farthest point from the waterlogged area to the nearest point. S3. First, fill the odd or even number of strip reclamation areas. Extract the bottom mud mixture from the water accumulation area in the coal mining subsidence area with high water level and then fill the top, bottom and bottom areas of the strip reclamation area in sequence. After the odd or even number of strip reclamation areas are filled, set up a load layer on top of them. S4. Prepare to fill the remaining even or odd number of strip reclamation areas, and the surcharge layer on the previously filled odd or even number of strip reclamation areas can be used as filling material until all strip reclamation areas are completely filled. In step S2, before filling the top, bottom, or slope areas, isolation walls are set up at the edges of the top, bottom, or slope areas. In step S2, the filling process for the slope crest area includes: first, drilling several gravel wells on the surface of the slope crest area; then, laying a gravel layer on the surface; covering the gravel layer with a gravel permeable membrane; filling the gravel permeable membrane with a mixture of bottom sediment extracted from the waterlogged area to the designed thickness, thus forming a slope crest filling layer; drilling several gravel wells within the slope crest filling layer; covering the slope crest filling layer with a gravel permeable membrane; and setting a surcharge layer on the gravel permeable membrane, with the surcharge layer having the same thickness and volume as the slope crest filling layer. In step S2, the filling process of the slope area includes: laying a slope gravel layer on the surface; laying slope drainage pipes in the slope gravel layer; using a water pump to extract water from the slope drainage pipes; covering the slope gravel layer with a slope gravel permeable membrane; filling the slope gravel permeable membrane with a slope filling layer; drilling several slope filling sand wells in the slope filling layer; covering the top of the slope filling layer with a slope filling permeable membrane; filling the top of the slope filling permeable membrane with a surcharge layer; the surcharge layer at the top of the slope area has the same shape and volume as the slope filling layer. In step S2, the filling process for the slope bottom area includes: laying a slope bottom gravel layer on the surface; laying a slope bottom drainage pipe in the slope bottom gravel layer; using a water pump to extract water from the slope bottom drainage pipe; covering the slope bottom gravel layer with a slope bottom gravel permeable membrane; filling the slope bottom filling layer on the slope bottom gravel permeable membrane; drilling several slope bottom filling sand wells in the slope bottom filling layer; covering the upper end of the slope bottom filling layer with a slope bottom filling permeable membrane; filling the upper end of the slope bottom filling permeable membrane with a surcharge layer; the surcharge layer on the slope bottom filling permeable membrane has the same thickness and volume as the slope bottom filling layer.

2. The method for rapidly realizing surface backfilling and reclamation of coal mining subsidence areas with high groundwater levels according to claim 1, characterized in that: The isolation wall is made of steel plate or fly ash silicate block.

3. The method for rapidly realizing surface backfilling and reclamation of coal mining subsidence areas with high groundwater levels according to claim 1, characterized in that: In step S2, before filling the top, bottom, or top areas of the slope, the topsoil is stripped off. After all the strip reclamation areas have been filled, the topsoil is then backfilled.

4. The method for rapidly realizing surface backfilling and reclamation of coal mining subsidence areas with high groundwater levels according to claim 1, characterized in that: The diameter of the gravel well at the top of the slope is 0.9-1.5cm, and the well is filled with gravel with a diameter of 0.2-5mm. The thickness of the gravel layer at the top of the slope is 0.5m, and the gravel layer at the top of the slope is filled with gravel of 0.2-5mm. The thickness of the infill layer at the top of the slope is 0.6m; The diameter of the sand filling well at the top of the slope is 9-15cm, and the well is filled with sand and gravel with a diameter of 0.2-5mm.

5. The method for rapidly realizing surface backfilling and reclamation of coal mining subsidence areas with high groundwater levels according to claim 1, characterized in that: The thickness of the gravel layer on the slope is 0.5m, and the gravel layer on the slope is filled with gravel of 0.2-5mm. The drainage pipes for the sloping land are PVC pipes with a diameter of 10cm; The thickness of the slope filling layer is 2m; The diameter of the sand filling wells on slopes is 9-15cm, and the wells are filled with gravel with a diameter of 0.2-5mm.

6. The method for rapidly realizing surface backfilling and reclamation of coal mining subsidence areas with high groundwater levels according to claim 1, characterized in that: The thickness of the gravel layer at the bottom of the slope is 0.5m, and the gravel layer at the bottom of the slope is composed of gravel with a thickness of 0.2-5mm. The drainage pipe at the bottom of the slope is a PVC pipe with a diameter of 10cm; The thickness of the slope bottom filling layer is 2m; The diameter of the sand filling well at the bottom of the slope is 9-15cm, and the well is filled with sand and gravel with a diameter of 0.2-5mm.

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