Slag yard debris flow prevention and control structure

Abstract

The debris flow prevention and control structure comprises the slag yard, a blocking dam, a drainage groove and an energy dissipation pool. The blocking dam is arranged on the upstream of the slag yard, part of the top face of the blocking dam is sunken downwards to form an overflow opening allowing debris flow on the upstream of the slag yard to penetrate through, and a drain hole is formed in a dam body. The energy dissipation pool is arranged on the downstream of the slag yard, the discharge and guide groove is formed in the top of the slag yard and extends in the direction from the blocking dam to the energy dissipation pool, and the plane shape is a straight line or a large-radius curve. The upstream end of the drainage groove is communicated with the overflow port of the blocking dam through the apron, and the downstream end of the drainage groove is communicated with the energy dissipation pool through the slag yard retaining wall, so that debris flow on the upstream of the slag yard is drained through the overflow port, then guided into the energy dissipation pool through the drainage groove and further drained into a natural channel on the downstream of the slag yard. According to the scheme, the problem that debris flow and muck in a muck yard are mixed, so that the muck becomes a source of the debris flow, and the debris flow phenomenon is aggravated can be avoided, and the influence of the debris flow on a downstream area is reduced to a certain extent.

Description

Technical Field

[0001] The embodiment of the utility model relates to the technical field of debris flow prevention and control, and in particular to a debris flow prevention and control structure for a slag yard. Background Art

[0002] In mountainous areas, the excavated soil from tunnels often needs to be stored in mountain ditches to form a slag dump, and the ditches in geologically complex areas often develop debris flows. If reasonable prevention measures are not taken against debris flows, when a debris flow breaks out, the soil in the slag dump will become the source of the debris flow, exacerbating the impact of the debris flow on the downstream area.

[0003] For this purpose, a debris flow dam is usually set up at a certain distance upstream of the slag dump. The dam can block large solid materials of the debris flow upstream of the slag dump and allow liquid and small solid materials to pass through the dam and flow downstream.

[0004] However, when the debris flow is large, a large amount of debris will rush through the retaining dam and flow into the slag dump, and mix with the slag in the slag dump, causing the slag to become the source of debris flow, thereby aggravating the debris flow phenomenon and causing serious impact on the downstream areas. Utility Model Content

[0005] In order to solve the above technical problems or at least partially solve the above technical problems, an embodiment of the utility model provides a mudslide prevention and control structure for a slag yard.

[0006] The embodiment of the utility model provides a slag field debris flow prevention structure, including a slag field, a retaining dam, a drainage channel and an energy dissipation pool;

[0007] The retaining dam is arranged upstream of the slag dump, and part of the top surface of the retaining dam is sunken downward to form an overflow port for the debris flow upstream of the slag dump to pass through, and the dam body of the retaining dam is reserved with drainage holes for passing liquid and small pieces of solid; the energy dissipation pool is arranged downstream of the slag dump; the drainage channel is arranged on the top of the slag dump and extends from the retaining dam to the energy dissipation pool;

[0008] The upstream end of the drainage channel is connected to the overflow port, and the downstream end of the drainage channel is connected to the energy dissipation pool, so that the debris flow upstream of the slag yard is discharged through the overflow port and then guided into the energy dissipation pool through the drainage channel.

[0009] In some embodiments, a guardrail is provided between the retaining dam and the upstream end of the drainage channel, the guardrail is lower than the height of the overflow port and is flush with the height of the upstream end of the drainage channel;

[0010] In the width direction of the retaining dam, the width dimension of the guardrail is consistent with the width dimension of the overflow outlet.

[0011] In some embodiments, a row guide groove transition section is provided between the guard apron and the row guide groove, the upstream end of the row guide groove transition section is communicated with the guard apron, and the downstream end of the row guide groove transition section is communicated with the upstream end of the row guide groove;

[0012] In the direction from the retaining dam to the drainage guide groove, the dimension of the drainage guide groove transition section in the width direction of the retaining dam gradually decreases.

[0013] In some embodiments, the lower portion of the row guide groove transition section is consistent in width direction; the guard tank has consistent dimensions along the width direction of the overflow port;

[0014] And / or, a dimension of a downstream end of the drain guide channel in a width direction of the retaining dam is consistent with a dimension of the drain guide channel in a width direction of the retaining dam.

[0015] In some embodiments, the height of the bottom surface of the drainage channel gradually decreases along the direction from the retaining dam to the energy dissipation pool;

[0016] And / or, the drainage guide groove is a curved drainage guide groove protruding toward the outer edge of the slag field, or the drainage guide groove is a straight drainage guide groove.

[0017] In some embodiments, the bottom of the drainage channel is provided with an anti-skid pier, and the anti-skid pier extends into the slag yard;

[0018] A plurality of anti-slip piers are provided, and the plurality of anti-slip piers are arranged at intervals along the extending direction of the row guide groove.

[0019] In some embodiments, a support beam extending along the width direction of the row guide groove is provided in the row guide groove, and two ends of the support beam are respectively connected to the two side groove walls of the row guide groove;

[0020] There is a preset height distance between the support beam and the bottom wall of the row guide groove;

[0021] There are a plurality of support beams, and the plurality of support beams are arranged at intervals along the length extension direction of the row guide groove.

[0022] In some embodiments, a slag retaining wall is provided on the downstream side of the slag dump, and the slag retaining wall is located between the downstream end of the drainage channel and the energy dissipation pool;

[0023] Part of the top surface of the slag yard retaining wall is recessed downward to form a discharge outlet respectively connected to the drainage channel and the energy dissipation pool.

[0024] In some embodiments, the drain hole is located below the overflow port;

[0025] There are multiple drainage holes, and the multiple drainage holes are distributed in an array on the retaining dam, and the distribution width of the drainage holes is consistent with the width of the overflow port.

[0026] Compared with the prior art, the technical solution provided by the embodiment of the utility model has the following advantages:

[0027] An embodiment of the utility model provides a structure for preventing and controlling debris flow in a slag yard, including a slag yard, a retaining dam, a drainage channel and an energy dissipation pool. The retaining dam is arranged upstream of the slag yard, and part of the top surface of the retaining dam is depressed downward to form an overflow port through which the debris flow upstream of the slag yard can pass, and the dam body of the retaining dam is provided with drainage holes to allow liquids and small pieces of solids to pass through. The energy dissipation pool is arranged downstream of the slag yard, and the drainage channel is arranged on the top of the slag yard and extends from the retaining dam to the energy dissipation pool. The upstream end of the drainage channel is connected to the overflow port, and the downstream end of the drainage channel is connected to the energy dissipation pool, so that the debris flow upstream of the slag yard can be discharged through the overflow port and then guided into the energy dissipation pool through the drainage channel. That is to say, the mudslide prevention and control structure of the slag yard provided by the embodiment of the utility model preliminarily blocks the mudslide by setting up a retaining dam, and also sets a drainage channel on the downstream side of the retaining dam, and sets the drainage channel at the top of the slag yard, so that the mudslide that is not blocked by the retaining dam can flow out from the overflow port and then flow to the downstream side along the drainage channel specially set on the top of the slag yard and finally flow into the energy dissipation pool for storage, thereby avoiding the mudslide from mixing with the slag soil in the slag yard, causing the slag soil to become the source of the mudslide and thus aggravating the mudslide phenomenon, thereby reducing the impact of the mudslide on the downstream area to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings herein are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the embodiments of the utility model, and together with the description, are used to explain the principles of the embodiments of the utility model.

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0030] Figure 1 This is a schematic diagram of the structure of the slag dump debris flow prevention and control structure according to an embodiment of the utility model;

[0031] Figure 2 It is a longitudinal section schematic diagram of the retaining dam of the debris flow prevention structure of the slag field according to the embodiment of the utility model;

[0032] Figure 3 A top view of the retaining dam and the protective tank of the debris flow prevention structure of the slag yard described in the embodiment of the utility model;

[0033] Figure 4 A longitudinal schematic diagram of the drainage channel of the mud-rock flow prevention and control structure of the slag field according to the embodiment of the utility model;

[0034] Figure 5 It is a cross-sectional schematic diagram of the drainage channel of the mud-rock flow prevention and control structure of the slag field according to the embodiment of the utility model;

[0035] Figure 6 A top view of the drainage channel of the mud-rock flow prevention and control structure of the slag field according to the embodiment of the utility model;

[0036] Figure 7 A schematic diagram of a drainage channel and a slag field of a mud-rock flow prevention and control structure for a slag field according to an embodiment of the utility model;

[0037] Figure 8 This is a structural schematic diagram of the drainage trough and slag yard retaining wall of the slag yard debris flow prevention and control structure described in an embodiment of the utility model.

[0038] Among them, 1. slag dump; 2. retaining dam; 21. overflow outlet; 22. drainage hole; 3. drainage chute; 31. anti-skid pier; 32. support beam; 4. energy dissipation pool; 5. tank guard; 6. drainage chute transition section; 7. slag dump retaining wall; 71. discharge outlet. DETAILED DESCRIPTION

[0039] In order to more clearly understand the above-mentioned purposes, features and advantages of the embodiments of the present invention, the scheme of the embodiments of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0040] In the following description, many specific details are set forth to facilitate a full understanding of the embodiments of the utility model, but the embodiments of the utility model can also be implemented in other ways different from those described herein; obviously, the embodiments in the specification are only part of the embodiments of the utility model, rather than all of the embodiments.

[0041] Reference Figures 1 to 8 As shown, this embodiment provides a slag dump debris flow prevention structure, including a slag dump 1, a retaining dam 2, a drainage channel 3 and an energy dissipation pool 4.

[0042] The retaining dam 2 is arranged upstream of the slag dump 1, and part of the top surface of the retaining dam 2 is sunken downward to form an overflow port 21 for the debris flow upstream of the slag dump 1 to pass through, and the dam body of the retaining dam 2 is reserved with a drainage hole 22 for passing liquid and small pieces of solid. The energy dissipation pool 4 is arranged downstream of the slag dump 1, and the drainage channel 3 is arranged on the top of the slag dump 1 and extends from the retaining dam 2 to the energy dissipation pool 4.

[0043] The upstream end of the drainage channel 3 is connected to the overflow port 21 , and the downstream end of the drainage channel 3 is connected to the energy dissipation pool 4 , so that the debris flow upstream of the slag yard 1 is discharged through the overflow port 21 and then guided into the energy dissipation pool 4 through the drainage channel 3 .

[0044] When implementing it, refer to Figure 1 and Figure 2 As shown, the retaining dam 2 is arranged upstream of the slag field 1, and is used to initially block the debris flow that may occur upstream of the slag field 1, thereby reducing the debris flow from passing through the retaining dam 2 and entering the slag field 1 or downstream of the slag field 1 to a certain extent. When the debris flow is large, a large amount of debris flow may overflow the overflow port 21 and then enter the drainage channel 3 connected to the overflow port 21. The drainage channel 3 is arranged at the top of the slag field 1 and flows to the downstream of the slag field 1 along the terrain of the slag field 1, and finally flows to the energy dissipation pool 4 downstream of the slag field 1 for storage.

[0045] That is to say, the drainage trough 3 is set at the top of the slag dump 1, so that the debris flow can flow downstream through the specially set channel, thereby avoiding the debris flow from contacting and mixing with the slag soil in the slag dump 1, which causes the slag soil in the slag dump 1 to form the source of the debris flow and aggravate the debris flow phenomenon, thereby achieving controllable scale of the debris flow and ensuring the safety of the slag dump 1.

[0046] Exemplarily, the overflow port 21 may be configured as a trapezoidal overflow port 21 or may be configured as a rectangular overflow port 21 , and the setting area of ​​the overflow port 21 may be determined according to the flow rate of the debris flow.

[0047] The debris flow prevention and control structure of the slag yard provided in this embodiment includes a slag yard 1, a retaining dam 2, a drainage channel 3 and an energy dissipation pool 4. The retaining dam 2 is arranged upstream of the slag yard 1, and part of the top surface of the retaining dam 2 is recessed downward to form an overflow port 21 for the debris flow upstream of the slag yard 1 to pass through. The energy dissipation pool 4 is arranged downstream of the slag yard 1, and the drainage channel 3 is arranged on the top of the slag yard 1 and extends from the retaining dam 2 to the energy dissipation pool 4. The upstream end of the drainage channel 3 is connected to the overflow port 21, and the downstream end of the drainage channel 3 is connected to the energy dissipation pool 4, so that the debris flow upstream of the slag yard 1 is discharged through the overflow port 21 and then guided into the energy dissipation pool 4 through the drainage channel 3. That is to say, the debris flow prevention and control structure of the slag yard provided by the embodiment of the utility model preliminarily blocks the debris flow by setting up a retaining dam 2, and further sets up a drainage channel 3 on the downstream side of the retaining dam 2, and sets the drainage channel 3 at the top of the slag yard 1, so that the debris flow that is not blocked by the retaining dam 2 can flow out from the overflow port 21 and then flow to the downstream side along the drainage channel 3 specially set up on the top of the slag yard 1 and finally flow into the energy dissipation pool 4 for storage, thereby avoiding the debris flow from mixing with the slag soil of the slag yard 1, causing the slag soil to become the source of the debris flow and thus aggravating the debris flow phenomenon, thereby reducing the impact of the debris flow on the downstream area to a certain extent.

[0048] Reference Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, a guard 5 is provided between the retaining dam 2 and the upstream end of the drainage channel 3. The guard 5 is lower than the height of the overflow port 21 of the retaining dam 2 and is flush with the height of the upstream end of the drainage channel 3. In the width direction of the retaining dam 2, the width dimension of the guard 5 is consistent with the width dimension of the overflow port 21.

[0049] That is to say, the debris flow rushing through the overflow port 21 first falls and deposits on the apron 5, and then the debris flow accumulated on the apron 5 reaches a certain amount and flows to the drainage channel 3. That is, the apron 5 can serve as an intermediate transition platform for receiving and depositing the debris flow.

[0050] Furthermore, by setting the width of the apron 5 to be consistent with the width of the overflow port 21, the debris flow passing through the overflow port 21 can fall smoothly and deposit on the apron 5 to avoid the debris flow falling outside the apron 5, thereby ensuring the apron 5's role in receiving the deposition of the debris flow.

[0051] Reference Figure 1 As shown, in some embodiments, a drain guide groove transition section 6 is provided between the guard tank 5 and the drain guide groove 3, the upstream end of the drain guide groove transition section 6 is connected to the guard tank 5, and the downstream end of the drain guide groove transition section 6 is connected to the upstream end of the drain guide groove 3.

[0052] Along the direction from the retaining dam 2 to the drainage channel 3 , the dimension of the drainage channel transition section 6 along the width direction of the retaining dam 2 gradually decreases.

[0053] In specific implementation, due to production cost issues, the width dimension of the drainage guide groove 3 is usually smaller than the width dimension of the apron 5. In order to reliably connect the drainage guide groove 3 and the apron 5, a drainage guide groove transition section 6 can be set between the apron 5 and the drainage guide groove 3. The width dimension of the drainage guide groove transition section 6 in the direction from the retaining dam 2 to the drainage guide groove 3 gradually decreases, so that the width dimension of the apron 5 can be shrunk by the drainage guide groove transition section 6, so as to facilitate the debris flow to flow smoothly into the drainage guide groove 3 after passing through the apron 5 and the drainage guide groove 3 transition groove.

[0054] Exemplarily, when the drainage trough 3 is set at the top of the slag dump 1, the height of the bottom surface of the drainage trough 3 can be set to be flush with the slag surface of the slag dump 1. The specific drainage trough 3 can be rectangular or trapezoidal and have a certain longitudinal slope downward, so as to reliably divert the debris flow to the energy dissipation pool 4 downstream of the slag dump 1.

[0055] In specific implementation, the upstream end of the drainage guide groove 3 is consistent in the width direction along the lower part of the drainage guide groove transition section 6; the size of the guard tank 5 in the width direction along the overflow port 21 is consistent, and the size of the downstream end of the drainage guide groove 3 in the width direction along the retaining dam 2 is consistent with the size of the drainage guide groove 3 in the width direction along the retaining dam 2, so that the width dimension of the guard tank 5 can be shrunk to be consistent with the width dimension of the drainage guide groove 3 through the drainage guide groove transition section 6, so as to facilitate the debris flow to flow smoothly into the drainage guide groove 3 after passing through the guard tank 5 and the drainage guide groove 3 transition groove.

[0056] In some embodiments, the height of the drainage channel 3 gradually decreases along the direction from the retaining dam 2 to the energy dissipation pool 4, that is, the drainage channel 3 has a downward longitudinal slope in the direction from the upstream of the slag dump 1 to the downstream of the slag dump 1, thereby reliably diverting the debris flow to the downstream of the slag dump 1.

[0057] Specifically, the drainage guide groove 3 is a curved drainage guide groove protruding toward the outer edge of the slag yard 1, or the drainage guide groove 3 is a straight drainage guide groove, that is, a straight drainage guide groove or a curved drainage guide groove is used to connect the guard tank 5 and the downstream energy dissipation pool 4, which can reduce the resistance in the mud and rock flow drainage process and ensure the drainage effect.

[0058] For example, when the drainage guide groove 3 is set as a curved drainage guide groove, compared with the solution in the prior art that the drainage guide groove is set at one side edge of the slag yard, since the drainage guide groove 3 of this embodiment is set at the top of the slag yard 1, the drainage guide groove 3 can be set as a curved drainage guide groove, that is, the drainage guide groove 3 can present an arc-shaped drainage guide groove with a large radius curve, thereby reducing the resistance in the mud and rock flow drainage process and ensuring the drainage effect.

[0059] When the drainage groove 3 is set as a straight drainage groove, it is different from the prior art that the drainage groove is set at one side edge of the slag field, so that the drainage groove needs to bend back and forth along the outer edge contour of the slag field. The drainage groove 3 in this embodiment is set at the top of the slag field 1, so it is not restricted by the outer edge contour of the slag field 1. Therefore, the drainage groove 3 in this embodiment can be set to a straight line to reduce the resistance in the mud and rock flow drainage process and ensure the drainage effect.

[0060] Reference Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, an anti-skid pier 31 is provided at the bottom of the drainage trough 3, and the anti-skid pier 31 extends into the slag field 1, thereby ensuring that the drainage trough 3 will not slide relative to the slag field 1, thereby playing an anti-skid role.

[0061] Furthermore, a plurality of anti-skid piers 31 are provided, and the plurality of anti-skid piers 31 are arranged at intervals along the length extension direction of the drainage guide groove 3, so that the plurality of anti-skid piers 31 can cooperate with the slag yard 1 to further ensure that the drainage guide groove 3 does not slide relative to the slag yard 1, so as to further enhance the anti-skid effect.

[0062] Reference Figure 4 , Figure 5 and Figure 6 As shown, in some embodiments, a support beam 32 extending along the width direction of the row guide groove 3 is provided in the row guide groove 3, and both ends of the support beam 32 are respectively connected to the two side groove walls of the row guide groove 3, so that the row guide groove 3 can be structurally supported, thereby improving the structural stability of the row guide groove 3.

[0063] Further, refer to Figure 5 As shown, there is a preset height gap between the support beam 32 and the bottom wall of the drainage groove 3, so that there is an escape space between the support beam 32 and the bottom wall of the drainage groove 3 for the debris flow to pass through, thereby avoiding affecting or blocking the flow of the debris flow.

[0064] In this embodiment, there are multiple support beams 32, and the multiple support beams 32 are arranged at intervals along the length extension direction of the row guide groove 3, so that the row guide groove 3 can be structurally supported by the multiple support beams 32 to further improve the structural stability of the row guide groove 3.

[0065] Reference Figure 1 and Figure 8 As shown, in some embodiments, a slag retaining wall 7 is provided at the downstream side of the slag field 1, and the slag retaining wall 7 is located between the downstream end of the drainage channel 3 and the energy dissipation pool 4. Part of the top surface of the slag retaining wall 7 is recessed downward to form a discharge port 71 connected to the drainage channel 3 and the energy dissipation pool 4, respectively, so as to prevent the debris flow from scouring the slag retaining wall 7.

[0066] Exemplarily, the discharge port 71 may be configured to have the same width and height as the discharge channel 3 , thereby ensuring that the debris flow passes smoothly through the discharge port 71 and enters the energy dissipation pool 4 .

[0067] Reference Figure 2 As shown, in some embodiments, the drainage hole 22 is located below the overflow port 21, so that the liquid or small particles in the debris flow can be discharged through the drainage hole 22 and then flow through the guard tank 5 and then flow into the drainage channel 3, so as to ensure that the liquid or small particles can smoothly pass through the retaining dam 2.

[0068] Specifically, there are multiple drainage holes 22, which are distributed in an array on the retaining dam 2 and the distribution width of the drainage holes 22 is consistent with the width of the overflow port 21, so that the liquid or small particles in the debris flow can be discharged through different drainage holes 22 and fall smoothly on the guard tank 5, thereby improving the flow efficiency of the liquid and small particles.

[0069] This embodiment relates to a debris flow prevention and control structure of a slag field, including a slag field 1, a retaining dam 2, a drainage channel 3 and an energy dissipation pool 4. The retaining dam 2 is located upstream of the slag field 1, and part of the top surface of the retaining dam 2 is recessed downward to form an overflow port 21 for the debris flow upstream of the slag field to pass through, and a drainage hole 22 is provided on the dam body. The energy dissipation pool 4 is located downstream of the slag field 1, and the drainage channel 3 is located at the top of the slag field 1 and extends from the retaining dam 2 to the energy dissipation pool 4, and the plane shape is a straight line or a large radius curve. The upstream end of the drainage channel 3 is connected to the overflow port 21 of the retaining dam 2 through the guard tank 5, and the downstream end of the drainage channel 3 is connected to the energy dissipation pool 4 through the slag yard retaining wall 7, so that the debris flow upstream of the slag yard 1 is discharged through the overflow port 21 and then guided into the energy dissipation pool 4 through the drainage channel 3, and then discharged into the natural channel downstream of the slag yard 1. This solution can avoid the problem of the debris flow mixing with the slag yard slag, causing the slag to become the source of the debris flow and thus aggravating the debris flow phenomenon, so as to reduce the impact of the debris flow on the downstream area to a certain extent.

[0070] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0071] The above description is only a specific implementation of the embodiment of the utility model, so that those skilled in the art can understand or implement the embodiment of the utility model. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the embodiment of the utility model. Therefore, the embodiment of the utility model will not be limited to these embodiments described herein, but will conform to the widest range consistent with the principles and novel features of the embodiment of the utility model described herein.

Claims

1. A debris flow prevention and control structure for a slag site, characterized in that: It comprises a slag field (1), a retaining dam (2), a drainage channel (3) and an energy dissipation pool (4); The retaining dam (2) is arranged upstream of the slag dump (1), and a portion of the top surface of the retaining dam (2) is recessed downward to form an overflow port (21) through which the debris flow upstream of the slag dump (1) can pass, and the dam body of the retaining dam (2) is provided with a drainage hole (22) for passing liquid and small pieces of solid; the energy dissipation pool (4) is arranged downstream of the slag dump (1); the drainage channel (3) is arranged on the top of the slag dump (1) and extends in a direction from the retaining dam (2) to the energy dissipation pool (4); The upstream end of the drainage groove (3) is in communication with the overflow port (21), and the downstream end of the drainage groove (3) is in communication with the energy dissipation pool (4), so that the debris flow upstream of the slag field (1) is discharged through the overflow port (21) and then guided into the energy dissipation pool (4) through the drainage groove (3).

2. The mudslide prevention and control structure of the slag site according to claim 1 is characterized in that: A guardrail (5) is provided between the retaining dam (2) and the upstream end of the drainage channel (3), the guardrail (5) being lower than the height of the overflow port (21) and being flush with the height of the upstream end of the drainage channel (3); In the width direction of the retaining dam (2), the width dimension of the guardrail (5) is consistent with the width dimension of the overflow outlet (21).

3. The mudslide prevention and control structure of the slag site according to claim 2 is characterized in that: A drain guide groove transition section (6) is provided between the guard (5) and the drain guide groove (3), the upstream end of the drain guide groove transition section (6) is communicated with the guard (5), and the downstream end of the drain guide groove transition section (6) is communicated with the upstream end of the drain guide groove (3); Along the direction from the retaining dam (2) to the drainage guide groove (3), the dimension of the drainage guide groove transition section (6) in the width direction of the retaining dam (2) gradually decreases.

4. The mudslide prevention and control structure of the slag site according to claim 3 is characterized in that: The upstream end of the drainage groove (3) is consistent in width direction along the lower part of the drainage groove transition section (6); the size of the guard (5) in the width direction along the overflow port (21) is consistent; And / or, the dimension of the downstream end of the drainage guide groove (3) in the width direction of the retaining dam (2) is consistent with the dimension of the drainage guide groove (3) in the width direction of the retaining dam (2).

5. The mudslide prevention and control structure of the slag site according to claim 1, characterized in that: In the direction from the retaining dam (2) to the energy dissipation pool (4), the height of the bottom surface of the drainage channel (3) gradually decreases.

6. The mudslide prevention and control structure of the slag site according to claim 5, characterized in that: The drainage groove (3) is a curved drainage groove protruding toward the outer edge of the slag field (1), or the drainage groove (3) is a straight drainage groove.

7. The mudslide prevention and control structure for a slag dump according to any one of claims 1 to 6, characterized in that: The bottom of the drainage trough (3) is provided with an anti-slip pier (31), and the anti-slip pier (31) extends into the slag field (1); A plurality of the anti-slip piers (31) are provided, and the plurality of anti-slip piers (31) are arranged at intervals along the length extension direction of the row guide groove (3).

8. The mudslide prevention and control structure for a slag dump according to any one of claims 1 to 6, characterized in that: A support beam (32) extending along the width direction of the row guide groove (3) is arranged in the row guide groove (3), and two ends of the support beam (32) are respectively connected to two side groove walls of the row guide groove (3); There is a preset height gap between the support beam (32) and the bottom wall of the row guide groove (3); There are a plurality of support beams (32), and the plurality of support beams (32) are arranged at intervals along the extension direction of the row guide groove (3).

9. The mud-rock flow prevention and control structure for a slag site according to any one of claims 1 to 6, characterized in that: A slag retaining wall (7) is provided on the downstream side of the slag yard (1), and the slag retaining wall (7) is located between the downstream end of the drainage channel (3) and the energy dissipation pool (4); Part of the top surface of the slag retaining wall (7) is recessed downward to form a discharge port (71) that is respectively connected to the drainage channel (3) and the energy dissipation pool (4).

10. The mudslide prevention and control structure for a slag dump according to any one of claims 1 to 6, characterized in that: The drain hole (22) is located below the overflow port (21); There are a plurality of drainage holes (22), and the plurality of drainage holes (22) are distributed in an array on the retaining dam (2), and the distribution width of the drainage holes (22) is consistent with the width of the overflow port (21).

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