Reinforcing treatment structure for anti-seepage transition section of irregular rock slope of pit landfill

Abstract

The invention discloses a reinforcement treatment structure of an irregular rock slope anti-seepage transition section of a pit landfill. The reinforcing treatment structure of the anti-seepage transition section comprises an anti-seepage gelling composite spraying filler layer (2) formed by wet spraying of anti-seepage gelling composite spraying filler on the surface of the anti-seepage transition section, an anti-seepage geomembrane (3) laid on the surface of the anti-seepage gelling composite spraying filler layer (2), a rubber pad (7) laid on the surface of the anti-seepage geomembrane (3) and a thin steel plate (6) laid on the surface of the rubber pad (7). The anti-seepage gelling composite spray filler comprises the following components in percentage by weight: 20%-25% of a curing gelling material, 55%-61% of tailing sand and 18%-21% of water. The method is applied to reinforcement of the irregular rock slope anti-seepage transition section of the mine pit landfill, the problem that the irregular rock slope anti-seepage transition section is prone to damage in the fixing process is solved, potential hazards are eliminated, the safety and reliability of an anti-seepage system are improved, good economic benefits are achieved, and safety and environmental protection benefits are remarkable.

Description

Technical Field

[0001] The present invention belongs to the technical field of anti-seepage reinforcement of mine pit slopes, and particularly relates to a reinforcement and treatment structure for an anti-seepage transition section of an irregular rock slope of a mine landfill, and is particularly suitable for application in the anti-seepage reinforcement project of the slope of a waste mine used as a solid waste landfill. Background Technique

[0002] At present, using a waste mine as a solid waste landfill not only solves the ecological restoration problem of the waste mine, but also provides a new path for the site selection of the solid waste landfill, alleviating the shortage of land resources in industrial solid waste landfills. In view of the characteristics of large floor area and difficult site finding of solid waste landfills, the site selection of solid waste landfills has become one of the key issues of concern in current solid waste treatment, and the idea of using a waste mine as a solid waste landfill site has emerged as the times require.

[0003] When using a waste mine as a solid waste landfill, there are many technical problems in the construction and operation of the landfill. Among them, the anti-seepage and pollution control technology problems of the bottom and slope of the mine are the key technical problems that need to be solved urgently in the mine landfill. The leachate leaks through the fractured rock and soil mass, directly affecting the surrounding soil and groundwater, and further affecting the drinking of surrounding groundwater, surface water irrigation, lake aquaculture, etc.

[0004] The mine anti-seepage system consists of two parts: bottom anti-seepage and slope anti-seepage. The main function of the anti-seepage system is to isolate the infiltration of leachate and avoid secondary pollution, and its role in protecting the overall ecological environment of the mine and its surroundings cannot be ignored.

[0005] The mine anti-seepage system mostly uses an anti-seepage geomembrane as the anti-seepage lining layer, and protective layers are set up and down according to the undulation of the slope. Among them, the bottom anti-seepage can effectively solve the problem of bottom flatness through site trimming, ensuring the safety and reliability of the anti-seepage geomembrane laying. However, due to the previous mining activities, the slopes mostly show irregular shapes with unevenness and large undulations. When the anti-seepage geomembrane is directly laid, stress concentration areas are formed due to the irregular slopes, and the side pressure formed by the accumulated solid waste during the operation of the landfill causes anti-seepage damage, and it has strong concealment and high repair costs.

[0006] At present, a variety of new anti-seepage materials are applied to the anti-seepage of mine pit slopes. For example, new cementitious materials are used in combination with anti-seepage geomembranes to solve the problems of difficult anti-seepage and low reliability on irregular rock slopes. To prevent the leachate flowing out of the solid waste landfill from polluting groundwater, the anti-seepage materials need to be laid on the bottom and slopes of the landfill pit according to a certain structure to form an anti-seepage layer. In related technologies, the anti-seepage layer mainly blocks the leachate from penetrating into the ecological environment by laying high-density polyethylene HDPE membranes (HDPE membranes). And according to the actual engineering situation, a single-layer high-density polyethylene HDPE membrane or multiple layers of high-density polyethylene HDPE membranes can be selected for laying. When laying the HDPE membrane on a slope, the joint direction should be parallel to the slope surface, and horizontal joints on the slope are not allowed to avoid stress concentration at its welded joints due to the sliding force on the slope, thereby pulling the joint and leading to penetration points.

[0007] Chinese Patent 202223090706.0 discloses an anti-seepage structure for a landfill slope, which sequentially includes a base layer, a cushion layer, an anti-seepage layer, a protection layer, and a sandbag layer from bottom to top. The anti-seepage layer includes a first HDPE membrane, a second HDPE membrane, and a water absorption component. Two welding strips are welded at the overlapping position of the first HDPE membrane and the second HDPE membrane. A through groove is formed by the first HDPE membrane, the second HDPE membrane, and the two welding strips. The water absorption component is arranged in the through groove, and the water absorption component contains a reagent that can detect moisture. By adopting the above technical solution, two welding strips are welded at the splicing position of the first HDPE membrane and the second HDPE membrane, so that the anti-seepage layer has greater shear strength and tensile strength at its splicing position, reducing the stress concentration of the HDPE membrane at the welding strip due to the sliding force and generating new penetration points. At the same time, the two welding strips also have a double anti-seepage effect. However, this anti-seepage structure for a landfill slope also has the problems of high construction cost and difficulty in large-scale industrial application, especially it is not suitable for anti-seepage on the irregular rock slopes of mine pit landfills. A mine pit steep slope anti-seepage system based on a polymerized mineral anti-seepage material disclosed in Chinese Patent Application 202411113707.3 uses the method of filling the outer geocell with a polymerized mineral anti-seepage material, and the inner geocell is filled with graded pebbles; for the Chinese Patent with the publication number CN112523264A, the slope base is leveled and passivated by using the shotcrete with wire mesh technology before laying, which has problems such as high construction cost, great difficulty, and large hidden dangers of the shotcrete layer; for the Chinese Patent with the publication number CN217782093U, to improve the anti-slip stability of the protection structure and the anti-seepage membrane, the slope needs to be treated, which has problems such as complex construction technology, great excavation difficulty, and slope disturbance and instability.

[0008] The fixing method of the anti-seepage transition section is very important for the safety and reliability of the landfill anti-seepage system. So far, there is no unified standard for the fixing method of the transition section. The single steel bar slope fixing method is mostly used, which is likely to cause damage to the anti-seepage body of the transition section and has relatively large potential hidden dangers. Summary of the Invention

[0009] The purpose of the present invention is to provide a reinforcement and treatment structure for the anti-seepage transition section of the irregular rock slope of the pit landfill, which is convenient for construction, economical and effective, and safe and reliable, aiming at the technical problems such as the large construction difficulty, high construction cost, easy damage to the anti-seepage body of the transition section, and potential hidden danger risks in the current fixing of the anti-seepage transition section.

[0010] To achieve the above object of the present invention, the following technical solutions are adopted for a reinforcement and treatment structure for the anti-seepage transition section of the irregular rock slope of the pit landfill of the present invention:

[0011] For a reinforcement and treatment structure for the anti-seepage transition section of the irregular rock slope of the pit landfill of the present invention, the anti-seepage transition section is demarcated by the anti-seepage boundary line. One side of the anti-seepage boundary line is an irregular rock slope, and the other side is a regular rock slope. Its characteristics are: the reinforcement and treatment structure of the anti-seepage transition section includes an anti-seepage cementitious composite spray material layer formed by wet-spraying the anti-seepage cementitious composite spray material on the surface of the anti-seepage transition section, an anti-seepage geomembrane laid on the surface of the anti-seepage cementitious composite spray material layer, a rubber pad laid on the surface of the anti-seepage geomembrane, and a thin steel plate laid on the surface of the rubber pad; the anti-seepage cementitious composite spray material layer is uniform and straight on the surface of the irregular rock slope and extends a length of L1 on the regular rock slope, and the thickness of the anti-seepage cementitious composite spray material layer formed by wet-spraying on the regular rock slope is uniformly transitioned to 0; the anti-seepage geomembrane laid from the regular rock slope extends and is laid a length of L2 along the anti-seepage demarcation line towards the irregular rock slope, and the bidirectional extension sections of the anti-seepage cementitious composite spray material layer and the anti-seepage geomembrane form an overlapping section; according to the designed hole diameter and spacing, drill holes in the rubber pad and the thin steel plate respectively, and the drilling positions on the rubber pad and the thin steel plate correspond; drill the hollow grouting anchor from the drill holes of the thin steel plate and the rubber pad in a self-drilling manner and penetrate into the rock in the anti-seepage cementitious composite spray material layer, with the rock-inclination angle being α and the rock-in depth being La; after the hollow grouting anchor is fixed, cut off the redundant part of the extended laying section of the anti-seepage geomembrane, and use the anti-seepage plugging agent to fill and bond the gaps between the thin steel plate, the rubber pad, the anti-seepage geomembrane and the anti-seepage cementitious composite spray material layer, and evenly apply the anti-seepage plugging agent along the periphery of the thin steel plate;

[0012] When the total mass of the anti-seepage cementitious composite spray material is 100%, the ratio of each component is: 20% - 25% of the curing cementitious material, 55% - 61% of the tailings sand, and 18% - 21% of water; the mass proportion of the particle size grade of 0.5mm - 0.25mm in the tailings sand > 85%;

[0013] The solidified cementitious material is composed of a stabilizer, a composite powder, sodium silicate, and cement. When the total mass is calculated as 100%, the content of each component is as follows: stabilizer 11% - 14%, composite powder 11% - 14%, sodium silicate 30% - 42%, and cement 29% - 45%; in the stabilizer, the mass percentage ratio is calcium chloride 50% - 60% and sodium tetraborate decahydrate 40% - 50%; the composite powder is prepared by mixing carbide slag powder, desulfurized gypsum, fly ash, and blast furnace slag, and the mass percentage ratio is carbide slag powder 30% - 35%, desulfurized gypsum 16% - 20%, fly ash 20% - 24%, and blast furnace slag 21% - 26%.

[0014] Preferably, the particle size of the composite powder is such that the mass fraction of the particle size less than 35μm is more than 90%.

[0015] Preferably, for the anti-seepage cementitious composite spray filling layer (2) formed by wet spraying on the irregular rock slope, the thickness δ = 5cm - 15cm, and on the regular rock slope, the extended wet spraying length L1 = 1.0m - 2.0m.

[0016] Preferably, the anti-seepage geomembrane laid is an HDPE geomembrane with a specification of 1.5mm - 2.0mm, and the extended laying length L2 = 0.8m - 1.5m.

[0017] Preferably, when the total mass of the anti-seepage cementitious composite spray filling material is 100%, the ratio of each component is as follows: solidified cementitious material 21% - 23%, tailings sand 57% - 60%, and water 19% - 21%; when the total mass of the solidified cementitious material is calculated as 100%, the content of each component is as follows: stabilizer 12% - 14%, composite powder 12% - 14%, sodium silicate 33% - 39%, and cement 33% - 39%; in the stabilizer, the mass percentage ratio is calcium chloride 54% - 57% and sodium tetraborate decahydrate 43% - 46%.

[0018] Preferably, the hollow grouting bolt has a full-length corrugated thread, is equipped with a fixing nut and a special quick grouting joint. The specification model of the hollow grouting bolt is R20 - 25, the drilling depth into the rock La = 50cm - 1.5m, the plane spacing M along the axis direction of the drilling hole is 30cm - 50cm, and the inclination angle α of the hollow grouting bolt into the rock is 15° - 25°.

[0019] Preferably, the nut matches the specification size of the hollow grouting bolt, and the specification model of the nut is M16 - M20.

[0020] Preferably, the thin steel plate is a steel plate with a thickness less than 3 mm, with a specification size of 2 mm to 3 mm, a width B = 30 cm to 50 cm, an axial length L3 = 1 to 2 m, pre-drilled on the surface, the hole diameter matching the specification of the hollow grouting bolt, the hole spacing M2 = 30 cm to 50 cm, and lined with a rubber pad; the rubber pad is a high-pressure resistant rubber pad with a thickness of 3 mm to 5 mm.

[0021] Preferably, the anti-seepage and leakage plugging agent is an inorganic waterproof plugging material, with the code FDⅡGB 23440-2009.

[0022] After the reinforcement and treatment structure of the irregular rock slope anti-seepage transition section of the mine pit landfill adopts the above technical solutions, the following positive effects are specifically shown:

[0023] (1) In the present invention, a lap section is formed by the new anti-seepage gelation of the anti-seepage geomembrane in two-way extension, improving the stability of the transition section fixing structure, and having the advantages of strong operability and reliable construction.

[0024] (2) The present invention utilizes the anchoring stability of the hollow grouting bolt and the cushioning effect of the high-pressure resistant rubber pad to form a fixed structure with good airtightness, improving the safety and stability of the anti-seepage transition section.

[0025] (3) The anti-seepage gelation composite spray filler developed in the present invention makes full use of the chemical properties of the fine-grained minerals in the tailings sand. Under the action of the added compounds, through physical and chemical reactions, an impermeable polymer colloid is formed. This polymer does not react chemically with acids, alkalis, and other salts, and has good workability and extremely low permeability, only 1 / 3000 of high-quality clay, and the permeability coefficient can reach k = 0.3×10 -9 .

[0026] (4) The anti-seepage gelation composite spray filler developed in the present invention has good acid and alkali resistance, strong stability, high consolidation strength, is convenient for construction and laying, has high spraying efficiency, and does not require rolling.

[0027] (5) The anti-seepage gelation composite spray filler developed in the present invention endows the slurry with good setting characteristics and mechanical properties, and the strength at 28 days is greater than 20 MPa.

[0028] (6) The composite powder in the cured gelation material developed in the present invention and the tailings sand used are all industrial solid wastes, do not require secondary calcination, have a simple production process, are environmentally friendly, require less investment, and reduce the carbon emissions and energy consumption of the traditional cementitious material clinker calcination.

[0029] (7) The present invention is applied to the reinforcement of the irregular rock slope anti-seepage transition section of the mine pit landfill, overcoming the problem of easy damage during the fixing process of the irregular rock slope anti-seepage transition section, and not only having good economic benefits, but also having remarkable safety and environmental protection benefits. Brief Description of the Drawings

[0030] Figure 1 This is the plan view of the reinforcement and treatment structure of the anti-seepage transition section of the irregular rock slope in a mine pit landfill of the present invention;

[0031] Figure 2 This is the sectional view of the reinforcement and treatment structure of the anti-seepage transition section of the irregular rock slope in a mine pit landfill of the present invention.

[0032] Reference Signs: 1-1—Regular rock slope; 1-2—Irregular rock slope; 2—Anti-seepage cementitious composite spraying filler layer; 3—Anti-seepage geomembrane; 4—Hollow grouting anchor bolt; 5—Nut; 6—Thin steel plate; 7—Rubber pad; 8-Anti-seepage plugging agent; 9—Anti-seepage boundary line. Detailed Description of the Invention

[0033] To better describe the present invention, the reinforcement and treatment structure of the anti-seepage transition section of the irregular rock slope in a mine pit landfill of the present invention will be further described in detail below with reference to the drawings.

[0034] In the embodiment, after the waste mine solid waste landfill in a certain abandoned mine pit is filled to a relative elevation of 15m, the area of the irregular rock slope accounts for about 20%. The combined anti-seepage of a new anti-seepage cementitious material and HDPE geomembrane is adopted, and a single steel bar slope fixation is used for the fixation of the transition section of the two anti-seepage materials. During the operation process, the anti-seepage membrane in the transition section is damaged, and effective engineering measures are urgently needed to be taken for treatment or governance.

[0035] From Figure 2 the sectional view of the reinforcement and treatment structure of the anti-seepage transition section of the irregular rock slope in a mine pit landfill of the present invention shown and in combination with Figure 1 it can be seen that the anti-seepage transition section is demarcated by the anti-seepage boundary line 9. One side of the anti-seepage boundary line 9 is the irregular rock slope 1-2, and the other side of the anti-seepage boundary line 9 is the regular rock slope 1-1. In the embodiment, the reinforcement and treatment structure of the anti-seepage transition section of the irregular rock slope in a mine pit landfill of the present invention is implemented by the following steps:

[0036] S1 Preparation of Anti-seepage Cementitious Composite Spraying Filler

[0037] According to the "Pollution Control Standard for Storage and Landfill of General Industrial Solid Wastes" (GB 18599-2020), a solidified gelling material, tailings sand, and water are mixed to prepare an anti-seepage gelling composite spraying filler. When the total mass of the anti-seepage gelling composite spraying filler is 100%, the ratio of each component is: 22% of the solidified gelling material, 59% of the tailings sand, and 19% of the water; the mass ratio of the particle size of 0.5 mm to 0.25 mm in the tailings sand > 85%; the solidified gelling material is composed of a stabilizer, a composite powder, sodium silicate, and cement. When the total mass is calculated as 100%, the content of each component is: 12% of the stabilizer, 13% of the composite powder, 36% of sodium silicate, and 39% of cement; in the stabilizer, the mass percentage ratio is 55% of calcium chloride and 45% of sodium tetraborate decahydrate; the composite powder is prepared by mixing carbide slag powder, desulfurized gypsum, fly ash, and blast furnace slag. The mass percentage ratio is 32% of carbide slag powder, 18% of desulfurized gypsum, 24% of fly ash, and 26% of blast furnace slag. The particle size of the composite powder is such that the mass ratio of the particle size less than 35 μm is more than 90%.

[0038] S2 Wet spraying of the anti-seepage gelling composite spraying filler

[0039] Wet spray the anti-seepage gelling composite spraying filler prepared in step S1 on the irregular rock slope, and extend the wet spray for a length of L1 = 1.5 m to the regular rock slope 1-1 on the other side of the anti-seepage boundary 9, so as to form an anti-seepage gelling composite spraying filler layer 2 on the surface of the anti-seepage transition section; the surface of the anti-seepage gelling composite spraying filler layer 2 sprayed and filled on the irregular rock slope 1-2 is uniform and flat, evenly covered, and the average thickness δ = 5 cm. The thickness of the anti-seepage gelling composite spraying filler layer 2 sprayed and filled in the L1 length section is uniformly transitioned from 5 cm to 0.

[0040] S3 Laying of the anti-seepage geomembrane

[0041] According to the "Pollution Control Standard for Storage and Landfill of General Industrial Solid Wastes" (GB 18599-2020), lay a 1.5 mm HDPE anti-seepage geomembrane 3 with a specified anti-seepage effect from the regular rock slope 1-1, and extend and lay it for a length of L2 = 1.0 m along the anti-seepage demarcation line 9 to the irregular rock slope 1-2. The two-way extension section of the anti-seepage gelling composite spraying filler layer 2 and the anti-seepage geomembrane 3 forms an overlapping section.

[0042] S4 Laying and fixing of rubber pads and thin steel plates

[0043] Pre-drill holes on the surface of the thin steel plate 6 according to the diameter of the hollow grouting anchor rod 4. The thin steel plate 6 is a steel plate with a thickness of 2 mm to 3 mm and a width B = 30 cm. The axial length L3 = 1.5 m, and the pre-drilled holes are arranged at equal intervals along the axis, with a spacing M2 = 30 cm; the rubber pad 7 is a high-pressure resistant rubber pad with a thickness of 3 mm, and the width, axial length, and hole diameter are arranged in the same way as the thin steel plate 6. Lay the rubber pad 7 and the thin steel plate 6 on the anti-seepage geomembrane 3 from the inside out, and the drilling positions on the rubber pad 7 and the thin steel plate 6 correspond; the specification of the hollow grouting anchor rod 4 is R20. Drill the hollow grouting anchor rod 4 into the rock in the anti-seepage cementitious composite spraying filler layer 2 by self-drilling through the drilled holes in the thin steel plate 6 and the rubber pad 7. The rock-inclination angle is α = 20°, the rock-in depth is La = 50 cm, the plane spacing M = 30 cm, which is the same as the hole diameter spacing M. After entering the rock, grout from the bottom until the slurry returns from the hole mouth, and use the nut 5 of M16 model for fixation.

[0044] Trimming of S5 anti-seepage and plugging agent

[0045] After the hollow grouting anchor rod 4 is fixed, cut off the excess part of the extended laying section of the anti-seepage geomembrane 3, reserve 30 cm, and use the anti-seepage and plugging agent 8 to fill and bond the gaps between the thin steel plate 6, the rubber pad 7, the anti-seepage geomembrane 3 and the anti-seepage cementitious composite spraying filler layer 2, and evenly apply the anti-seepage and plugging agent 8 along the periphery of the thin steel plate 6 to further improve the sealing performance. The anti-seepage and plugging agent 8 is selected as the quick-setting type according to the setting time, and the code is FDⅡGB 23440-2009.

[0046] The test and inspection results show that the reinforcement and treatment structure of the irregular rock slope anti-seepage transition section of a mine landfill site in the present invention is applied to the reinforcement of the irregular rock slope anti-seepage transition section of the mine landfill site. The anti-seepage transition section reinforcement and treatment structure composed of the anti-seepage cementitious composite spraying filler layer 2, the anti-seepage geomembrane 3 laid on the surface of the anti-seepage cementitious composite spraying filler layer 2, the rubber pad 7 laid on the surface of the anti-seepage geomembrane 3, and the thin steel plate 6 laid on the surface of the rubber pad 7 not only has extremely low permeability, only 1 / 3000 of high-quality clay, and the permeability coefficient can reach k = 0.3×10 -9 Moreover, it is firm and reliable, completely solving the problem of easy damage during the fixation of the regular rock slope anti-seepage transition section.

[0047] The above is a better embodiment in the on-site implementation of the invention. The present invention has also conducted experimental studies on the upper limit, lower limit, and other intermediate ratios of the relevant components in the anti-seepage cementitious composite spraying filler. The permeability coefficient is between (0.25 - 0.5)×10 -9 and will not be listed one by one again.

Claims

1. A reinforcement and management structure for an irregular rock slope anti-seepage transition section of a mine landfill, wherein the anti-seepage transition section is divided by an anti-seepage boundary line (9), one side of the anti-seepage boundary line (9) is an irregular rock slope (1-2), and the other side of the anti-seepage boundary line (9) is a regular rock slope (1-1), characterized in that: The reinforcement and management structure of the anti-seepage transition section comprises an anti-seepage gel composite spraying filling material layer (2) formed by wet spraying anti-seepage gel composite spraying filling material on the surface of the anti-seepage transition section, an anti-seepage geomembrane (3) laid on the surface of the anti-seepage gel composite spraying filling material layer (2), a rubber pad (7) laid on the surface of the anti-seepage geomembrane (3), and a thin steel plate (6) laid on the surface of the rubber pad (7); the anti-seepage gel composite spraying filling material layer (2) is uniformly straight on the surface of the irregular rock slope (1-2) and extends a length of L1 on the regular rock slope (1-1); the thickness of the anti-seepage gel composite spraying filling material layer (2) formed by wet spraying on the regular rock slope (1-1) is uniformly transitioned to 0; the anti-seepage geomembrane (3) laid from the regular rock slope (1-1) is extended and laid for a length of L2 along the anti-seepage boundary line (9) toward the irregular rock slope (1-2), The anti-seepage gelled composite sprayed filler layer (2) and the anti-seepage geomembrane (3) bidirectional extension section form an overlap section; according to the designed hole diameter and spacing, holes are drilled in the rubber pad (7) and the thin steel plate (6), and the drilling positions on the rubber pad (7) and the thin steel plate (6) correspond to each other; the hollow grouting anchor rod (4) is self-drilled through the drilled holes of the thin steel plate (6) and the rubber pad (7), and penetrates into the rock in the anti-seepage gelled composite sprayed filler layer (2), the rock penetration angle is α, and the rock penetration depth is La; after the hollow grouting anchor rod (4) is fixed, the excess part of the extended laying section of the anti-seepage geomembrane (3) is cut off, and the gaps between the thin steel plate (6), the rubber pad (7), the anti-seepage geomembrane (3) and the anti-seepage gelled composite sprayed filler layer (2) are filled and bonded with an anti-seepage plugging agent (8), and the anti-seepage plugging agent (8) is evenly applied along the periphery of the thin steel plate (6); When the total mass of the anti-seepage gelled composite spray filler is 100%, the proportion of each component is: 20% to 25% of solidified gelled material, 55% to 61% of tailings sand, and 18% to 21% of water; the mass proportion of 0.5mm to 0.25mm particle size in the tailings sand is greater than 85%; The solidified gelling material is mixed with a stabilizer, a composite powder, water glass and cement, and the content of each component when the total mass is calculated as 100% is: 11% to 14% of the stabilizer, 11% to 14% of the composite powder, 30% to 42% of the water glass and 29% to 45% of the cement; the mass percentage of the stabilizer is 50% to 60% of calcium chloride and 40% to 50% of sodium borate tetrahydrate; the composite powder is mixed with carbide slag powder, desulfurized gypsum, fly ash and blast furnace slag, and the mass percentage of the carbide slag powder is 30% to 35%, the desulfurized gypsum is 16% to 20%, the fly ash is 20% to 24% and the blast furnace slag is 21% to 26%.

2. A reinforcement and management structure for the anti-seepage transition section of an irregular rock slope in a mine landfill as claimed in claim 1, characterized in that: The particle size of the composite powder is less than 35 μm, accounting for more than 90% of the mass.

3. A reinforcement and management structure for the anti-seepage transition section of an irregular rock slope in a mine landfill as claimed in claim 1, characterized in that: The anti-seepage gelled composite spraying filling material layer (2) formed by wet spraying on the irregular rock slope (1-2) has a thickness of δ=5cm-15cm and extends on the regular rock slope (1-1) by a wet spraying length L1=1.0m-2.0m.

4. A reinforcement and management structure for the anti-seepage transition section of an irregular rock slope in a mine landfill as claimed in claim 1, characterized in that: The laid anti-seepage geomembrane (3) is a HDPE geomembrane with a specification of 1.5 mm to 2.0 mm, and the extended laying length L2 is 0.8 m to 1.5 m.

5. A reinforcement and management structure for the anti-seepage transition section of an irregular rock slope in a mine landfill as claimed in claim 1, 2, 3 or 4, characterized in that: When the total mass of the anti-seepage gelled composite spray filler is 100%, the proportion of each component is: 21% to 23% of solidified gelled material, 57% to 60% of tailings sand, and 19% to 21% of water; when the total mass of the solidified gelled material is 100%, the content of each component is: 12% to 14% of stabilizer, 12% to 14% of composite powder, 33% to 39% of water glass, and 33% to 39% of cement; the proportion of the stabilizer in terms of mass percentage is 54% to 57% of calcium chloride and 43% to 46% of sodium borate tetrahydrate.

6. A reinforcement and management structure for the anti-seepage transition section of an irregular rock slope in a mine landfill as claimed in claim 5, characterized in that: The hollow grouting anchor rod (4) is a full-length corrugated thread, equipped with a fixing nut (5) and a special quick grouting joint. The specification model of the hollow grouting anchor rod (4) is R20-25, the drilling depth into the rock La=50cm-1.5m, the plane spacing of the boreholes along the axial direction M=30cm-50cm, and the hollow grouting anchor rod (4) has an inclination angle α of 15°-25° into the rock.

7. A reinforcement and management structure for the anti-seepage transition section of an irregular rock slope in a mine landfill as claimed in claim 6, characterized in that: The nut (5) is matched with the specification and size of the hollow grouting anchor rod (4), and the specification model of the nut (5) is M16-M20.

8. A reinforcement and management structure for the anti-seepage transition section of an irregular rock slope in a mine landfill as claimed in claim 7, characterized in that: The thin steel plate (6) is a steel plate with a thickness of less than 3 mm, a specification size of 2 mm to 3 mm, a width B of 30 cm to 50 cm, an axis length L3 of 1 to 2 m, a surface pre-drilled hole processing, the hole diameter matches the specification of the hollow grouting anchor rod (4), the hole spacing M2 is 30 cm to 50 cm, and the inner lining is a rubber pad (7); the rubber pad (7) is a high-pressure resistant rubber pad with a thickness of 3 mm to 5 mm.

9. A reinforcement and management structure for the anti-seepage transition section of an irregular rock slope in a mine landfill as claimed in claim 8, characterized in that: The anti-seepage plugging agent (8) is an inorganic waterproof plugging material, code-named FDⅡGB 23440-2009.

10. The reinforcement and management structure for the anti-seepage transition section of the irregular rock slope of a mine landfill as claimed in claim 2, characterized in that: The thickness of the anti-seepage gelled composite sprayed filler layer (2) formed by wet spraying on the irregular rock slope (1-2) is δ=5cm-15cm, and the wet spraying length L1=1.0m-2.0m is extended on the regular rock slope (1-1); the laid anti-seepage geomembrane (3) is a HDPE geomembrane with a specification of 1.5mm-2.0mm, and the extended laying length L2=0.8m-1.5m; when the total mass of the anti-seepage gelled composite sprayed filler is 100%, the proportions of the components are: The solidified cementitious material comprises 21% to 23%, tailings sand 57% to 60%, and water 19% to 21%; the content of each component when the total mass of the solidified cementitious material is calculated as 100% is: stabilizer 12% to 14%, composite powder 12% to 14%, water glass 33% to 39%, cement 33% to 39%; the mass percentage of the stabilizer is 54% to 57% calcium chloride and 43% to 46% sodium borate tetrahydrate; the hollow grouting anchor rod (4) is full length The hollow grouting anchor rod (4) has a wave thread, a fixing nut (5) and a special quick grouting joint. The specification model of the hollow grouting anchor rod (4) is R20-25, the drilling depth into the rock is La=50cm-1.5m, the plane spacing of the borehole along the axial direction is M=30cm-50cm, and the hollow grouting anchor rod (4) has an inclination angle α of 15°-25° into the rock. The nut (5) is matched with the hollow grouting anchor rod (4) in specification and size, and the nut (5) is M16-M20. The thin steel plate (6) is a steel plate with a thickness of less than 3 mm, a specification size of 2 mm to 3 mm, a width B of 30 cm to 50 cm, an axial length L3 of 1 to 2 m, a surface pre-drilled hole processing, the hole diameter matches the specification of the hollow grouting anchor (4), the hole spacing M2 is 30 cm to 50 cm, and the inner lining is a rubber pad (7); the rubber pad (7) is a high-pressure resistant rubber pad with a thickness of 3 mm to 5 mm; the anti-seepage plugging agent (8) is an inorganic waterproof plugging material, code-named FDⅡGB 23440-2009.

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