A leakage prevention and plugging system for tailings pond drainage structure

Abstract

The present invention provides a tailings pond drainage structure anti-leakage plugging system, which relates to the field of tailings pond safety technology. The tailings pond drainage structure anti-leakage plugging system provided by the present invention includes a rigid plugging component, a flexible plugging component and a pressure relief seepage pipe; the rigid plugging component includes a first plugging body, which is used to be installed in the first card groove recessed by the lining at the entrance and exit of the leakage channel; the flexible plugging component includes a plurality of second plugging bodies distributed at intervals along the longitudinal direction of the leakage channel, the second plugging body includes a filling body and fixed splints located on both sides of the filling body along the longitudinal direction of the leakage channel, and the filling body is used to undergo a solidification micro-expansion polymerization reaction with the leaking tailings water and tailings; the pressure relief seepage pipe extends along the longitudinal direction of the leakage channel and the two ends respectively penetrate the first plugging body at the entrance and exit of the leakage channel. The above anti-leakage plugging system can effectively curb the occurrence of serious disasters and accidents of drainage structures and tailings dams.

Description

Technical Field

[0001] The invention relates to the technical field of tailings pond safety, and in particular to a leakage prevention and plugging system for a tailings pond drainage structure. Background Art

[0003] The main form of drainage structure is drainage well-discharge channel, and the main form of discharge channel is drainage culvert, drainage chute or drainage tunnel. The plugging quality of drainage structure is crucial to the safety of tailings pond. The existing drainage structure plugging technology mainly adopts rigid plugging, pouring concrete plugging blocks at the well seat of drainage well or the outlet of discharge channel. The length of the plugging blocks is generally between 0.5m and 5m, and some can reach 10m to 20m. This method has the disadvantages of poor shear strength of the interface between the lining of the drainage structure and the new and old concrete, and the rigid sealing blocks lack toughness, which are prone to brittle cracks, interface shear failure or rigid fracture failure. In addition, this method cannot effectively seal and protect the leakage channel, especially when the leakage channel is long, sometimes hundreds of meters or even thousands of meters. If there is lining damage, cracks, water leakage and sand leakage in any part of the leakage channel between the rigid sealing bodies, it may gradually develop into large local cracks, dislocations, fractures or even collapses over time, which will cause the tailings above the fracture to form a collapse zone or collapse pit, and ultimately cause a tailings leakage accident. Summary of the invention

[0004] The purpose of the present invention is to provide a tailings pond drainage structure leakage prevention and plugging system, which can effectively prevent the occurrence of serious disasters and accidents of drainage structures and tailings dams.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] The present invention provides a tailings pond drainage structure leakage prevention and plugging system, comprising a rigid plugging component, a flexible plugging component and a pressure relief seepage pipe;

[0007] The rigid plugging assembly comprises a first plugging body, which is used to be installed in a first groove recessed in the lining at the inlet and outlet of the leakage channel;

[0008] The flexible plugging assembly includes a plurality of second plugging bodies spaced apart in the longitudinal direction of the leakage channel, the second plugging body includes a filling body and fixed clamping plates located on both sides of the filling body in the longitudinal direction of the leakage channel, and the filling body is used to undergo a solidification micro-expansion polymerization reaction with the leaking tailings water and tailings;

[0009] The pressure-reducing and seepage-draining pipe extends in the longitudinal direction of the leakage channel, and two ends of the pipe respectively penetrate the first blocking body at the inlet and the outlet of the leakage channel.

[0010] Furthermore, the rigid sealing assembly also includes a first filling body, and the first filling body is used to be arranged in the first slot to fix the first sealing body in the first slot.

[0011] Furthermore, the fixing clamp is used to be installed in a second slot recessed in the lining of the leakage channel, and the flexible sealing assembly also includes a second filling body, which is used to be arranged in the second slot to fix the fixing clamp in the second slot.

[0012] Furthermore, the fixing splint is made of galvanized steel plate, geocomposite plate, steel mesh or steel strand mesh.

[0013] Furthermore, the filling body includes a flexible anti-seepage pad welded to the surfaces of the fixed clamping plates on both sides and a flexible masonry bag located between the flexible anti-seepage pads on both sides, and the flexible anti-seepage pad is installed in the second card slot through the second filling body.

[0014] Furthermore, the flexible masonry bag comprises a filling masonry bag layer and a reinforcement layer. The filling masonry bag layer and the reinforcement layer are alternately stacked along the vertical direction of the drainage channel, and the filling masonry bag layer comprises a plurality of filling masonry bags.

[0015] Furthermore, in two upper and lower adjacent filling bag layers, the filling bag layers that are arranged opposite to each other are arranged in a staggered manner.

[0016] Furthermore, the filling bag comprises a filling bag and a filling material filled in the filling bag, and the filling material is used to undergo a solidification micro-expansion polymerization reaction with the leaked tailings water and tailings.

[0017] Furthermore, the wall of the decompression and seepage drainage pipe is opened with a hole, the outside of the decompression and seepage drainage pipe is wrapped with a geotextile, and the geotextile is fixed to the outside of the decompression and seepage drainage pipe through a rope body;

[0018] A sealing pipe cap is provided at one end of the pressure-reducing and seepage-draining pipe that passes through the first blocking body at the entrance of the leakage channel.

[0019] Furthermore, when the fixed splint is made of galvanized steel plate or geocomposite plate, the tailings pond drainage structure leak-proof sealing system also includes a sealing layer and a pipe clamp, one end of the sealing layer is fixedly connected to the outside of the pressure-reducing and drainage pipe, and the other end is fixedly connected to the side of the fixed splint away from the filling body, and the pipe clamp is clamped to the outside of the sealing layer to clamp the sealing layer to the pressure-reducing and drainage pipe.

[0020] The tailings pond drainage structure leakage prevention and plugging system provided by the present invention can produce the following beneficial effects:

[0021] In the anti-leakage plugging system provided by the present invention, the rigid plugging components at the inlet and outlet of the leakage channel play a role of sealing and plugging, and at the same time, a plurality of second plugging bodies are distributed between the rigid plugging components on both sides. At each second plugging body, the fixed splints on both sides play a role of increasing the rigidity and strength of the plugging body. When the middle filling body is cracked, broken, greatly deformed, collapsed or damaged in the leakage channel, the pressure relief and drainage pipe can play a role of pressure relief and drainage, and the filling body undergoes a solidification and micro-expansion polymerization reaction with the leaking tailings water and tailings. Through solidification stabilization, volume expansion, anti-seepage and the connection and polymerization between the second plugging bodies, a rigid and flexible supporting body of a multi-point joint-piece collapse pit is formed, which plays a role of anti-seepage and plugging, energy absorption, buffering and energy dissipation. Through the plurality of second plugging bodies, multi-step and multi-level enhanced pressure relief and energy dissipation effects are exerted, thereby preventing the leakage channel from breaking, collapsing and expanding, preventing or slowing down further leakage of tailings, and effectively preventing or mitigating further development of the collapse pit of the tailings dam in the reservoir, thereby effectively curbing the occurrence of serious disasters of drainage structures and tailings dams. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic structural diagram of a tailings pond drainage structure leakage prevention and plugging system provided by the present invention;

[0024] Figure 2 A schematic structural diagram of a flexible plugging assembly provided by the present invention;

[0025] Figure 3 for Figure 1 A local enlarged schematic diagram of point A;

[0026] Figure 4 A cross-sectional view of a tailings pond drainage structure leakage prevention and plugging system provided by the present invention;

[0027] Figure 5 for Figure 1 A partial enlarged schematic diagram of point B.

[0028] Icons: 1-rigid plugging assembly; 11-first plugging body; 12-first filling body; 2-flexible plugging assembly; 21-second plugging body; 211-filling body; 2111-flexible anti-seepage pad; 2112-reinforcement layer; 2113-filling masonry bag; 212-fixing splint; 22-second filling body; 3-pressure relief and drainage pipe; 4-leakage channel; 41-first slot; 42-second slot; 5-sealing layer; 6-pipe clamp; 7-welding point. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0033] This embodiment provides a tailings pond drainage structure leakage prevention and plugging system, such as Figure 1 and Figure 2 As shown, it includes a rigid plugging component 1, a flexible plugging component 2 and a pressure relief drainage pipe 3;

[0034] The rigid plugging assembly 1 includes a first plugging body 11, which is used to be installed in a first groove 41 formed in the lining at the entrance and the exit of the leakage channel 4;

[0035] The flexible plugging assembly 2 includes a plurality of second plugging bodies 21 spaced apart longitudinally along the leakage channel 4. The second plugging body 21 includes a filling body 211 and fixed clamping plates 212 located on both sides of the filling body 211 along the longitudinal direction of the leakage channel 4. The filling body 211 is used to undergo a solidification micro-expansion polymerization reaction with the leaking tailings water and tailings;

[0036] The pressure-reducing and seepage-draining pipe 3 extends in the longitudinal direction of the leakage channel 4 , and both ends thereof penetrate through the first blocking bodies 11 at the inlet and the outlet of the leakage channel 4 , respectively.

[0037] The tailings pond drainage structure leak-proof plugging system provided in the present embodiment adds a flexible plugging component 2 to perform leak-proof plugging of the drainage structure, and a rigid plugging component 1 is arranged on both sides of the flexible plugging component 2. Compared with the traditional method of using only rigid concrete blocks to seal the well seat or the outlet of the leakage channel, the structural safety and reliability are increased, the failure probability of the drainage structure is reduced, and the occurrence of fractures and collapses along the leakage channel is effectively prevented.

[0038] Specifically, the first plugging bodies 11 on both sides of the flexible plugging assembly 2 in the above embodiment can play a role of sealing and plugging at the entrance and exit of the leakage channel 4. When the leakage channel is cracked, broken, greatly deformed, collapsed, etc., the decompression and drainage pipe 3 can play a role of decompression and drainage, the fixed splint in the flexible plugging assembly 2 can play a role of increasing the rigidity and strength of the second plugging body 21, and the filling body 211 in the flexible plugging assembly 2 can undergo a solidification micro-expansion polymerization reaction with the leaking tailings water and tailings. Through solidification stabilization, volume expansion, anti-seepage and the contact polymerization between the multiple second plugging bodies 21 distributed at intervals, a multi-point joint-piece collapse pit rigid and flexible supporting body is formed, which plays a role of anti-seepage and plugging, absorbing energy, buffering and dissipating energy, preventing or slowing down the expansion of the fracture and collapse of the leakage channel and the further development of the collapse pit of the tailings dam in the reservoir, thereby effectively curbing the occurrence of serious disasters of drainage structures and tailings dams.

[0039] The first blocking body 11 can be made of galvanized steel plate with a thickness between 4mm and 50mm, specifically 4mm, 10mm, 30mm or 50mm. The first blocking body 11 can also be made of geocomposite board with a thickness between 20mm and 200mm, specifically 20mm, 50mm, 100mm or 200mm.

[0040] In addition, the distance between the first blocking bodies 11 on both sides and the inlet or outlet of the leakage channel 4 may be 0.5 m to 2 m.

[0041] In an alternative embodiment, if Figure 1 As shown, in order to enable the first blocking body 11 to be more stably installed at the inlet and outlet of the leakage channel 4, the rigid blocking assembly 1 also includes a first filling body 12, which is used to be arranged in the first slot 41 to fix the first blocking body 11 in the first slot 41.

[0042] When the first sealing body 11 is made of galvanized steel plate, the galvanized steel plate is embedded in the first groove 41 of the lining of the leakage channel 4, the depth of the first groove 41 is 20mm-50mm, the width of the first groove 41 is 15mm-70mm, and the first filling body 12 is made of polymer mortar with high impermeability and high bonding strength, such as polyacrylic waterproof mortar or polyurethane waterproof mortar.

[0043] When the first blocking body 11 is made of a geocomposite board, the geocomposite board is embedded in the first groove 41 of the lining of the discharge channel 4. The depth of the first groove 41 is 20mm-50mm, and the width of the first groove 41 is 30mm-220mm. The first filling body 12 can be made of polymer mortar such as polyacrylic acid waterproof mortar or polyurethane waterproof mortar, or chemical grouting materials such as epoxy resin, acrylamide, polyurethane resin, etc., and the joints need to be filled tightly.

[0044] In an alternative embodiment, if Figure 1 As shown, the flexible blocking component 2 may include two, three, four or more second blocking bodies 21 spaced apart in the longitudinal direction of the leakage channel 4, and the interval between two adjacent second blocking bodies 21 is 5m-100m.

[0045] Among them, in each second blocking body 21, the interval between the fixing clamps 212 on both sides is 1m-20m.

[0046] The fixing splint 212 can be made of galvanized steel plate with a thickness between 2mm and 10mm, specifically 2mm, 5mm, 8mm or 10mm. The fixing splint 212 can also be made of geocomposite plate with a thickness between 10mm and 50mm, specifically 10mm, 20mm, 30mm or 50mm. The fixing splint 212 can also be made of steel mesh or steel strand mesh, with a steel bar diameter or steel strand bundle diameter between 4mm and 20mm, and a single hole area of ​​the steel bar or steel strand mesh of 100cm 2 -400cm 2 , the grid nodes are connected by wire rope tying or welding.

[0047] In an alternative embodiment, if Figure 2As shown, in order to ensure that the fixing clamp 212 can be installed more stably in the leakage channel 4, the fixing clamp 212 is used to be installed in the second card groove 42 recessed in the lining of the leakage channel 4, and the flexible sealing assembly 2 also includes a second filling body 22, and the second filling body 22 is used to be arranged in the second card groove 42 to fix the fixing clamp 212 in the second card groove 42.

[0048] When the fixed clamp plate 212 is made of galvanized steel plate, the galvanized steel plate is embedded in the second slot 42 of the lining of the discharge channel 4. The depth of the second slot 42 is 20mm-50mm, and the width of the second slot 42 is 6mm-30mm. The second filling body 22 is made of polymer mortar with high impermeability and high bonding strength, such as polyacrylic waterproof mortar or polyurethane waterproof mortar, and the caulking needs to be filled tightly.

[0049] When the fixed clamp 212 is made of geocomposite board, the geocomposite board is embedded in the second slot 42 of the lining of the discharge channel 4, the depth of the second slot 42 is 20mm-50mm, the width of the second slot 42 is 30mm-150mm, and the second filling body 22 can be made of polymer mortar such as polyacrylic acid waterproof mortar or polyurethane waterproof mortar, or chemical grouting materials such as epoxy resin, acrylamide, polyurethane resin, etc., and the caulking needs to be filled tightly.

[0050] When the fixed splint 212 is made of steel mesh or steel wire mesh, the anchoring depth of the steel mesh or steel wire mesh in the lining of the discharge channel 4 is 20mm-50mm. The second filling body 22 can be made of polymer mortar such as polyacrylic acid waterproof mortar or polyurethane waterproof mortar, or chemical grouting materials such as epoxy resin, acrylamide, polyurethane resin, etc., and the caulking needs to be filled tightly.

[0051] In an alternative embodiment, if Figure 3 As shown, the filling body 211 includes a flexible anti-seepage pad 2111 welded to the surface of the fixed clamping plates 212 on both sides and a flexible masonry bag located between the flexible anti-seepage pads 2111 on both sides. The flexible anti-seepage pad 2111 is installed in the second card slot 42 through the second filling body 22.

[0052] In the above embodiment, the flexible anti-seepage pad 2111 can further prevent water in the second blocking body 21 from seeping out.

[0053] The flexible anti-seepage pad 2111 can be made of single rough surface HDPE geomembrane or double rough surface HDPE geomembrane with a thickness of 1mm-5mm. The cross-sectional shape of the flexible anti-seepage pad 2111 is consistent with the leakage channel 4, and the size is increased by 20mm-50mm compared with the edge of the leakage channel 4. The increased part is embedded in the second card slot 42 or anchored in the second card slot 42 together with the fixing clamps 212 on both sides.

[0054] When the fixing clamps 212 on both sides are made of galvanized steel plates or geocomposite plates, the HDPE geomembrane used in the flexible anti-seepage pad 2111 is directly spot-welded. The spot welding extrusion type can be T-welded or cross-welded. The thickness of the welding part is 1.5-3 times the thickness of the membrane. Figure 3 As shown, the interval between welding points 7 is no more than 15 cm. When the fixed clamps 212 on both sides are made of steel mesh or steel strand mesh, the HDPE geomembrane used in the flexible anti-seepage pad 2111 is welded by palm-jointing extrusion, and the palm-jointing is made of the same material as the flexible anti-seepage pad, and the palm-jointing area is 25 cm 2 -100cm 2 , full-coverage welding is adopted, and the back of the palm uses upper and lower double "["-shaped claws to anchor and connect with each grid node of the steel mesh or steel wire mesh.

[0055] In an alternative embodiment, if Figure 2 and Figure 3 As shown, the flexible masonry bag includes a filling masonry bag layer and a reinforcement layer 2112. The filling masonry bag layer and the reinforcement layer 2112 are alternately stacked along the vertical direction of the drainage channel 4, and the filling masonry bag layer includes a plurality of filling masonry bags 2113.

[0056] In the above embodiment, the reinforcement layer 2112 can support the filling bagging layer and ensure the stability between the filling bagging layers.

[0057] In an alternative embodiment, if Figure 2 and Figure 3 As shown, in the two adjacent filling bag layers, the filling bags 2113 arranged opposite to each other are arranged alternately.

[0058] During the specific construction, the filled masonry bag layers can be staggered and stacked in a dry-laying manner. After the next layer is stacked, the next layer can be stacked. The overlap length of the upper and lower layers is 0.1m-3m.

[0059] Among them, the reinforcement layer 2112 can be made of reinforcement materials such as fine steel wire mesh, glass fiber reinforced geotextile, asphalt reinforced geotextile, and bidirectional geogrid.

[0060] It should be noted that the plane dimensions of the reinforcement layer 2112, in length and width, need to fully cover the lower filling bagging layer, and the thickness of the reinforcement layer 2112 is 1.5 mm to 5 mm.

[0061] In an optional embodiment, the filling bag 2113 includes a filling bag and a filling material filled in the filling bag, and the filling material is used to undergo a solidification micro-expansion polymerization reaction with the leaked tailings water and tailings.

[0062] In the above embodiment, the filled masonry bags 2113 are filled as independent units between the flexible anti-seepage pads 2111 on both sides to ensure that when the leakage channel 4 is damaged by cracking, fracture, large deformation, collapse, etc., each filled masonry bag 2113 can undergo a solidification micro-expansion polymerization reaction with the leaked tailings water and tailings, and play a role of buffering, efficiency, and support through its own volume expansion, thereby slowing down or even preventing the leakage channel 4 from fracture, collapse, and expansion.

[0063] Before construction, after the filling material is prepared, it is filled into the filling bag in small amounts, evenly and loosely by manual or small machinery. When the filling bag is filled, it can be properly stepped on, shaken or vibrated by manual or small machinery to make it dense so that the filling bag 2113 has a certain density, and the density is between 0.5-0.9.

[0064] Among them, the filling bag can be made of woven geotextile, non-woven geotextile, filament geotextile, short-filament geotextile or polypropylene woven bag; the filling bag weight specification is 250g / m 2 -800g / m 2 The dimensions of the filling bag are as follows: length 0.5m-6.0m, width 0.25m-3.0m, height 0.15m-0.3m after filling; the sealing method of the sealing part of the filling bag after filling can be adhesive bonding or hot melt.

[0065] The filling material can be composed of a mixture of dry tailings, lime and sodium-based bentonite. The moisture content of dry tailings is controlled to be no higher than 20%; the specifications of lime are 10 mesh to 200 mesh; the specifications of sodium-based bentonite are 50 mesh to 300 mesh; the mass of dry tailings accounts for 50% to 70%, the mass of lime accounts for 10% to 30%, and the mass of sodium-based bentonite accounts for 5% to 20%.

[0066] In an alternative embodiment, if Figure 4 As shown, the pressure relief and drainage pipes 3 can be configured as multiple pieces, specifically 1-20 pieces, and the pressure relief and drainage pipes 3 can be arranged in layers along the cross section of the drainage channel 4, with 1-4 layers, and at least one layer should be arranged at the bottom of the drainage channel 4.

[0067] The above-mentioned embodiment allows the pressure-reducing and seepage-draining pipes 3 to be distributed in the leakage channel 4 along the vertical direction of the leakage channel 4. When there is a lot of water in the leakage channel 4, the seepage water can be effectively and quickly discharged. Since the first blocking bodies 11 on both sides form a seal at the entrance and exit of the leakage channel 4, a sealed space is formed between the first blocking bodies 11 on both sides. The above-mentioned arrangement can realize the discharge of water in the blocking system, thereby playing the role of pressure reduction and seepage drainage.

[0068] The pressure relief seepage pipe 3 can be made of steel pipe, HDPE pipe or PVC pipe with a pipe diameter of 30mm-100mm. The length of the pressure relief seepage pipe 3 should exceed the first plugging body at the inlet and outlet of the leakage channel 4 by 0.2m-1m.

[0069] A sealing pipe cap is provided at one end of the decompression and seepage drainage pipe 3 that passes through the first blocking body 11 at the entrance of the leakage channel 4. The sealing pipe cap can seal the end of the decompression and seepage drainage pipe 3 at the entrance of the leakage channel 4.

[0070] Specifically, the wall of the pressure-reducing and seepage-draining pipe 3 is perforated, the perforation rate is 5%-20%, the aperture is 5mm-25mm, and the holes are arranged in a staggered manner.

[0071] In an optional implementation, the openings on the decompression and seepage drainage pipe 3 may be evenly distributed along the extension direction of the decompression and seepage drainage pipe 3 , or may be distributed at local positions of the decompression and seepage drainage pipe 3 .

[0072] For example, the pressure-reducing drainage pipe 3 includes a first pipe section and a second pipe section. The first pipe section can be passed through the first blocking body 11 and the second blocking body 21, and the second pipe section is located between the first blocking body 11 and the second blocking body 21, and between adjacent second blocking bodies 21. A hole can be opened on the first pipe section, but no hole can be opened on the second pipe section. Since a sealed cavity is formed between the first blocking body 11 and the second blocking body 21 through the first blocking body 11, the fixed splint 212 and the leakage channel 4, it is not easy to have water seepage, so there is no need to discharge the seepage in this section. Similarly, a sealed cavity is formed between the adjacent second blocking bodies 21 through the fixed splint 212 and the leakage channel 4, it is not easy to have water seepage, and there is no need to discharge the seepage in this section. Such a setting can reduce the number of holes required to be opened in the pressure-reducing drainage pipe 3, and is more convenient for the processing of the pressure-reducing drainage pipe 3.

[0073] In addition, in order to prevent the filling body and particles in the tailings water from blocking the holes on the pipe wall, the outside of the decompression and seepage drainage pipe 3 is wrapped with a geotextile, and the geotextile is fixed to the outside of the decompression and seepage drainage pipe 3 by a rope.

[0074] Among them, the specification of geotextile is 250g / m2-800g / m2, and the rope body can be a steel wire rope.

[0075] In an alternative embodiment, if Figure 5 As shown, when the fixed splint 212 is made of galvanized steel plate or geocomposite plate, a hole should be reserved in the fixed splint 212, and the pressure relief drainage pipe 3 passes through the fixed splint 212. The tailings pond drainage structure leakage prevention and plugging system also includes a sealing layer 5 and a pipe clamp 6. One end of the sealing layer 5 is fixedly connected to the outside of the pressure relief drainage pipe 3, and the other end is fixedly connected to the side of the fixed splint 212 away from the filling body 211. The pipe clamp 6 is clamped on the outside of the sealing layer 5 to clamp the sealing layer 5 to the pressure relief drainage pipe 3.

[0076] Specifically, during construction, the sealing layer 5 can be made of HDPE material, which is coated on the outside of the pressure relief pipe 3, and the end thereof extends to the surface of the fixed clamping plate 212. The area of ​​the sealing layer 5 is 25 cm 2 -100cm 2 Fully covered welding points 7 are used, and the ends of the sealing layer 5 are reinforced with stainless steel pipe clamps 6.

[0077] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A tailings pond drainage structure leakage prevention and plugging system, characterized in that: It comprises a rigid plugging component (1), a flexible plugging component (2) and a pressure-reducing drainage pipe (3); The rigid plugging assembly (1) comprises a first plugging body (11), wherein the first plugging body (11) is used to be installed in a first groove (41) recessed in the lining at the inlet and outlet of the leakage channel (4); The flexible plugging assembly (2) comprises a plurality of second plugging bodies (21) spaced apart in the longitudinal direction of the leakage channel (4), the second plugging body (21) comprising a filling body (211) and fixing clamping plates (212) located on both sides of the filling body (211) in the longitudinal direction of the leakage channel (4), the filling body (211) being used to undergo a solidification micro-expansion polymerization reaction with leaking tailings water and tailings; The pressure-reducing seepage-draining pipe (3) extends in the longitudinal direction of the leakage channel (4), and both ends of the pipe penetrate the first blocking body (11) at the entrance and the exit of the leakage channel (4) respectively.

2. The tailings pond drainage structure leakage prevention and plugging system according to claim 1 is characterized in that: The rigid blocking component (1) further comprises a first filling body (12), wherein the first filling body (12) is used to be arranged in the first slot (41) so as to fix the first blocking body (11) in the first slot (41).

3. The tailings pond drainage structure leakage prevention and plugging system according to claim 1, characterized in that: The fixing clamp (212) is used to be installed in a second groove (42) recessed in the lining of the leakage channel (4), and the flexible plugging assembly (2) also includes a second filling body (22), and the second filling body (22) is used to be arranged in the second groove (42) to fix the fixing clamp (212) in the second groove (42).

4. The tailings pond drainage structure leakage prevention and plugging system according to claim 1, characterized in that: The fixing clamping plate (212) is made of galvanized steel plate, geocomposite plate, steel mesh or steel strand mesh.

5. The tailings pond drainage structure leakage prevention and plugging system according to claim 3, characterized in that: The filling body (211) comprises a flexible anti-seepage pad (2111) welded to the surfaces of the fixing clamps (212) on both sides and a flexible masonry bag located between the flexible anti-seepage pads (2111) on both sides. The flexible anti-seepage pad (2111) is installed in the second slot (42) through the second filling body (22).

6. The tailings pond drainage structure leakage prevention and plugging system according to claim 5, characterized in that: The flexible masonry bag comprises a filling masonry bag layer and a reinforcement layer (2112), and along the vertical direction of the drainage channel (4), the filling masonry bag layer and the reinforcement layer (2112) are alternately stacked, and the filling masonry bag layer comprises a plurality of filling masonry bags (2113).

7. The tailings pond drainage structure leakage prevention and plugging system according to claim 6, characterized in that: In the two upper and lower adjacent filling bag layers, the filling bag (2113) arranged opposite to each other are arranged in a staggered manner.

8. The tailings pond drainage structure leakage prevention and plugging system according to claim 6, characterized in that: The filling bag (2113) comprises a filling bag and a filling material filled in the filling bag, wherein the filling material is used to undergo a solidification micro-expansion polymerization reaction with leaked tailings water and tailings sand.

9. The tailings pond drainage structure leakage prevention and plugging system according to claim 1, characterized in that: The wall of the decompression and seepage drainage pipe (3) is provided with a hole, the outside of the decompression and seepage drainage pipe (3) is wrapped with a geotextile, and the geotextile is fixed to the outside of the decompression and seepage drainage pipe (3) by a rope body; A sealing pipe cap is provided at one end of the pressure-reducing seepage-draining pipe (3) that passes through the first blocking body (11) at the entrance of the leakage channel (4).

10. The tailings pond drainage structure leakage prevention and plugging system according to claim 1, characterized in that: When the fixed clamp (212) is made of galvanized steel plate or geocomposite plate, the tailings pond drainage structure anti-leakage plugging system also includes a sealing layer (5) and a pipe clamp (6), one end of the sealing layer (5) is fixedly connected to the outside of the pressure-reducing drainage pipe (3), and the other end is fixedly connected to the side of the fixed clamp (212) away from the filling body (211), and the pipe clamp (6) is clamped on the outside of the sealing layer (5) to clamp the sealing layer (5) to the pressure-reducing drainage pipe (3).

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