Seepage drainage pipe for tailing pond

Abstract

The utility model relates to a drainage and seepage pipe for tailings pond, which comprises a seepage pipe outer layer and a seepage pipe inner layer, the seepage pipe outer layer and the seepage pipe inner layer are both provided with a plurality of seepage structures, the outer wall of the seepage pipe outer layer is wrapped with a wire mesh, and the seepage pipe outer layer and the seepage pipe inner layer are connected and fixed through at least two support plates. A cavity is formed between the permeation tube outer layer and the permeation tube inner layer and is used for accommodating a filtering material. The seepage drainage pipe is formed by connecting two layers of seepage pipes with water seepage structures, on one hand, the compressive strength of the seepage drainage pipe can be enhanced, the seepage drainage pipe is not prone to being pressed and deformed in a tailing pond with the large water content, and normal drainage of seepage water is guaranteed; on the other hand, under the condition that the compressive strength of the two layers is guaranteed, the size of the seepage drainage pipe can be properly increased, so that the seepage radius of the seepage drainage pipe is increased, and the drainage capacity is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of engineering drainage, in particular to a drainage pipe for a tailings pond. Background Art

[0002] Tailings ponds are places formed by building dams to intercept valley mouths or enclosing land to store tailings or other industrial wastes discharged after ore selection in metal or non-metal mines. Most tailings ponds have fine particles and poor permeability. The water content in the tailings ponds is large and the tailings ponds are easy to liquefy, which greatly reduces the compressive strength of the dam body, and may cause landslides and water seepage on the outer slope of the sub-dam. In more serious cases, it may lead to dam collapse, posing safety hazards.

[0003] At present, the purpose of lowering the infiltration line and improving the stability of the tailings dam is generally achieved by setting up a drainage system. The most commonly used drainage device is a drainage pipe, which is composed of a circular tube with holes on the surface and a geotextile wrapped on the outer surface. It has the advantages of simple structure, convenient construction, and good durability. For example, CN1963040A discloses a drainage method for a tailings dam and a drainage pipe used for implementing the method. The drainage pipe is composed of a seepage pipe body, a gauze mesh and a protective layer arranged in sequence on the outer layer of the seepage pipe body, and seepage grooves are evenly opened on the seepage pipe body parallel to the axial direction of the pipe body, and seepage holes identical to those inside the seepage pipe body are intermittently opened at the bottom of the seepage grooves. However, the existing seepage pipes have the following problems during use: 1. In a tailings pond with a large water content, as the dam is built higher, the radial pressure of the circular pipe continues to increase, causing the circular pipe to be compressed and deformed, affecting the discharge of seepage water; 2. The penetration radius of the circular pipe is small. To ensure the drainage volume, the spacing between the drainage pipes can only be reduced, resulting in an increase in the amount of engineering work; 3. The geotextile wrapped on the outer surface is prone to calcium deposition in alkaline slurry, which blocks the geotextile, resulting in a decrease in the permeability of the geotextile and failure of the drainage pipe. Utility Model Content

[0004] The utility model provides a seepage drainage pipe for a tailings pond.

[0005] The specific technical scheme of the utility model is: a seepage pipe for a tailings pond, comprising a permeation pipe outer layer and a permeation pipe inner layer, a plurality of water seepage structures are provided on the permeation pipe outer layer and the permeation pipe inner layer, the outer wall of the permeation pipe outer layer is wrapped with wire mesh, the permeation pipe outer layer and the permeation pipe inner layer are connected and fixed by at least two support plates, so that a cavity is formed between the permeation pipe outer layer and the permeation pipe inner layer, and the cavity is used to accommodate filter materials.

[0006] Further, preferably, the water seepage structure is water seepage holes or water seepage grooves distributed at intervals.

[0007] Furthermore, preferably, the mesh size of the wire mesh is 0.1 mm×0.1 mm.

[0008] Further, preferably, there are four support plates, which are respectively arranged at four points on the center line of the outer layer of the permeation tube and the inner layer of the permeation tube.

[0009] Furthermore, preferably, the particle size of the filter material is larger than the diameter of the water seepage hole or larger than the width of the water seepage groove.

[0010] The beneficial effects of the utility model are:

[0011] (1) The drainage pipe is connected by two layers of permeable pipes with seepage structures. On the one hand, it can enhance the compressive strength of the drainage pipe. In the tailings pond with a large water content, the drainage pipe is not easily deformed by pressure, thus ensuring the normal discharge of seepage water. On the other hand, when the compressive strength of the two layers is guaranteed, the size of the drainage pipe can be appropriately increased to increase the penetration radius of the drainage pipe and enhance the drainage capacity.

[0012] (2) The drainage pipe replaces the traditional geotextile with wire mesh, which can effectively avoid the problem of calcium accumulation and clogging of geotextile in alkaline environment, thus ensuring the permeability of the drainage pipe.

[0013] (3) The seepage pipe is filled with filter material 4 between the outer layer and the inner layer of the seepage pipe, so as to perform secondary filtration on the seepage liquid and reduce the risk of tailings pond drainage pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a cross-sectional view of a seepage drainage pipe for a tailings pond according to the utility model;

[0015] Figure 2 for Figure 1 Middle AA section;

[0016] Figure 3 This is a schematic diagram of the outer structure of the seepage pipe of the utility model;

[0017] Figure 4 This is a schematic diagram of the water seepage hole structure of the utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the water seepage trough of the utility model;

[0019] In the figure: 1-permeation tube outer layer, 2-permeation tube inner layer, 3-support plate, 4-filter material, 5-wire mesh, 6-seepage hole, 7-seepage trough. DETAILED DESCRIPTION

[0020] In order to make the technical problems and technical solutions solved by the utility model more clearly understood, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0021] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0022] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" 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 an indirect connection 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.

[0023] like Figures 1 to 3 As shown, a seepage pipe for a tailings pond includes a permeation pipe outer layer 1 and a permeation pipe inner layer 2, a plurality of water seepage structures are provided on the permeation pipe outer layer 1 and the permeation pipe inner layer 2, a wire mesh 5 is wrapped on the outer wall of the permeation pipe outer layer 1, the permeation pipe outer layer 1 and the permeation pipe inner layer 2 are connected and fixed by at least two support plates 3, the two support plates 3 are symmetrically arranged and relatively stable, so that a cavity is formed between the permeation pipe outer layer 1 and the permeation pipe inner layer 2, and the cavity is used to accommodate filter material 4.

[0024] The drainage pipe of the present application is formed by connecting two layers of permeable pipes with seepage structures. On the one hand, it can enhance the compressive strength of the drainage pipe, and the drainage pipe is not easily deformed by pressure in a tailings pond with a large water content, thereby ensuring the normal discharge of seepage water; on the other hand, while the compressive strength of the two layers is guaranteed, the size of the drainage pipe can be appropriately increased to increase the penetration radius of the drainage pipe and enhance the drainage capacity.

[0025] The present application replaces the traditional geotextile wrapped around the outer wall of the outer layer 1 of the infiltration pipe with a wire mesh 5 to avoid the problem of calcium clogging of the geotextile in an alkaline environment. The wire mesh 5 is used to intercept the tailings and ensure the permeability of the drainage pipe.

[0026] The present application fills the filter material 4 between the outer layer 1 and the inner layer 2 of the permeation tube, so as to perform secondary filtration on the permeate that penetrates through the outer layer 1 of the permeation tube, so as to make the permeate discharged through the inner layer 2 of the permeation tube as clean as possible, thereby reducing the risk of tailings pond drainage pollution.

[0027] When the drainage pipe of the present application is used to drain the tailings pond, the drainage pipe is buried in the tailings, the wire mesh 5 intercepts the tailings, and the water in the tailings permeates through and continues to permeate through the outer layer 1 of the permeation pipe into the filter material 4. The filter material 4 will continue to intercept the fine particles that the wire mesh 5 cannot intercept, and the filtered permeate continues to permeate to the inner layer 2 of the permeation pipe and is then discharged.

[0028] like Figure 4 Figure 5 As shown, the water seepage structure of the permeation tube outer layer 1 and the permeation tube inner layer 2 can be spaced permeation holes 6 or permeation grooves 7. When the permeation holes 6 are used, the water infiltration speed is slow, which is conducive to the wire mesh 5 and the filter material 4 to intercept the tailings; when the permeation grooves 7 are used, the water permeability can be enhanced, which is suitable for tailings ponds with high water content and can quickly infiltrate and drain water.

[0029] Preferably, the mesh size of the wire mesh 5 is 0.1 mm×0.1 mm, which can prevent fine particles from entering. The mesh size is not limited to this size, and can be adjusted according to the particle size of the material.

[0030] Preferably, Figure 1 As shown, the support plates 3 are provided in four pieces and are respectively provided at four points of the center line of the permeation tube outer layer 1 and the permeation tube inner layer 2. Such a configuration can make the connection between the permeation tube outer layer 1 and the permeation tube inner layer 2 more stable and more resistant to pressure.

[0031] Preferably, the particle size of the filter material 4 is larger than the aperture of the seepage hole 6 or larger than the width of the seepage groove 7 (i.e., the shortest side length of the seepage groove), so that the filter material 4 is kept in the cavity formed by the permeation tube outer layer 1 and the permeation tube inner layer 2 to play a filtering role.

[0032] The present invention is described in detail above through specific and preferred embodiments, but those skilled in the art should understand that the present invention is not limited to the embodiments described above, and any modifications, equivalent substitutions, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A seepage drainage pipe for a tailings pond, characterized in that: The invention comprises a permeation tube outer layer (1) and a permeation tube inner layer (2), wherein the permeation tube outer layer (1) and the permeation tube inner layer (2) are both provided with a plurality of water seepage structures, the outer wall of the permeation tube outer layer (1) is wrapped with a wire mesh (5), and the permeation tube outer layer (1) and the permeation tube inner layer (2) are connected and fixed by at least two support plates (3), so that a cavity is formed between the permeation tube outer layer (1) and the permeation tube inner layer (2), and the cavity is used to accommodate a filter material (4).

2. A seepage drainage pipe for a tailings pond according to claim 1, characterized in that: The water seepage structure is water seepage holes (6) or water seepage grooves (7) distributed at intervals.

3. The seepage drainage pipe for a tailings pond according to claim 1, characterized in that: The mesh size of the wire mesh (5) is 0.1 mm×0.1 mm.

4. The seepage drainage pipe for a tailings pond according to claim 1, characterized in that: There are four support plates (3), which are respectively arranged at four points on the center line of the outer layer (1) of the permeation tube and the inner layer (2) of the permeation tube.

5. A seepage drainage pipe for a tailings pond according to claim 4, characterized in that: The particle size of the filter material (4) is larger than the hole size of the water seepage hole (6) or larger than the width of the water seepage groove (7).

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