Plugging and drainage structure of tailing pond flood drainage facility

Abstract

The utility model relates to a plugging and drainage structure of a tailing pond flood drainage facility. The plugging and drainage structure comprises a flood drainage culvert, a flexible plugging section, a rigid plugging section and a permeation well. An inlet plug of the flood drainage culvert is provided with a flexible plug; a rigid blocking section is arranged in the middle of the flood drainage culvert in a blocking mode, and a drainage section is formed between the rigid blocking section and the flexible blocking section. A permeation well is formed in the bottom of the drainage section and extends downwards to the permeable layer. The flexible plugging section can filter accumulated water of the tailing pond and form progressive plugging, the permeation well directly guides the water filtered by the flexible plugging section into the ground, and an additional water guide pipe connected to the outside does not need to be arranged on the rigid plugging section. The problem that an existing plugging structure needs to depend on a water guide pipe for drainage before complete plugging is formed through flexible plugging can be effectively solved, dependence on an external drainage system is avoided, and the risk that a plugging body fails due to faults of the external drainage system such as the water guide pipe is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of tailings pond flood drainage, and particularly relates to a plugging and drainage structure for tailings pond flood drainage facilities. Background Technique

[0002] At present, the plugging of the tailings pond flood drainage system mainly has two plugging methods: rigid plugging and flexible plugging. The ultimate goal is to successfully plug the flood drainage system. In rigid plugging, after the plugging is completed, tailings and seepage water are blocked in front of the plugging body, and the outlet of the flood drainage system must be completely leak-free. Flexible plugging uses the principle of "hydraulic filtration" to control seepage damage, that is, anti-filtration materials are used to plug the seepage part, which can effectively intercept tailings. As time goes by, the tailings will gradually settle, the permeability of the plugging body will become worse and worse, and the seepage volume will become less and less, achieving a gradual plugging effect.

[0003] In the prior art, such as the utility model patent with the patent number CN 220117123 U, a plugging structure for a tailings pond flood drainage channel is proposed, which is composed of a grouting plugging section, a flexible plugging body section, and a permanent structure plugging body section continuously arranged from the inside to the outside of the tailings pond flood drainage channel. An anti-filtration layer not less than 1m is arranged upstream of the permanent structure plugging body section, effectively applying the principle of "first draining and then plugging" to avoid potential safety hazards caused by the failure of the flood drainage system plugging.

[0004] However, in the above prior art, before the flexible plugging forms a complete plugging, it still relies on a water guide pipe to drain the seepage water outside the culvert. This requires an additional pipeline system to manage the seepage water, and there is a risk of blockage or damage to the water guide pipe. If the water guide pipe fails, or the single drainage volume is too large, it may cause water pressure accumulation, thus having an adverse impact on the plugging structure.

[0005] Based on this, it is necessary to study a plugging and drainage structure for tailings pond flood drainage facilities. Content of the Utility Model

[0006] In view of this, the purpose of the utility model is to provide a plugging and drainage structure for tailings pond flood drainage facilities, which can effectively solve the problem that the existing plugging structure needs to rely on a water guide pipe for drainage before the flexible plugging forms a complete plugging.

[0007] To achieve the above purpose, the technical solution adopted by the utility model is:

[0008] A plugging and drainage structure for tailings pond flood drainage facilities includes a flood drainage culvert, a flexible plugging section, a rigid plugging section, and a permeation well;

[0009] The entrance of the flood drainage culvert is plugged with a flexible plug;

[0010] A rigid plugging section is provided in the middle of the flood drainage culvert, and a water discharge section is formed between the rigid plugging section and the flexible plugging section;

[0011] An infiltration well is opened at the bottom of the water discharge section, and the infiltration well extends downward to the permeable layer.

[0012] Further, the flexible plugging section includes a gravel layer, a crushed stone layer, and a fine sand layer that are continuously arranged in sequence from outside to inside, and the particle sizes of the gravel layer, the crushed stone layer, and the fine sand layer gradually become smaller.

[0013] Further, the rigid plugging section includes a first retaining wall, a second retaining wall, and a concrete section;

[0014] The first retaining wall and the second retaining wall are spaced and plugged in the middle of the flood drainage culvert, a pouring chamber is formed between the first retaining wall and the second retaining wall, a pouring pipe communicating with the pouring chamber penetrates through the first retaining wall, and the second retaining wall is adjacent to the water discharge section; a concrete section is poured between the first retaining wall and the second retaining wall.

[0015] Further, anchor rods are arranged downward at the bottom of the pouring chamber, a steel reinforcement cage is fixed at the upper end of the anchor rods, and the steel reinforcement cage is embedded in the concrete section.

[0016] Further, a drain pipe communicating with the water discharge section and the outside is horizontally penetrated through the upper part of the rigid plugging section.

[0017] Further, an electric control valve is arranged at one end of the drain pipe located in the water discharge section, a liquid level sensor is arranged at the top of the water discharge section, and the electric control valve and the liquid level sensor are controlled and connected.

[0018] Further, an exhaust pipe communicating with the water discharge section and the outside is penetrated through the rigid plugging section, and the exhaust pipe is located above the drain pipe.

[0019] Further, the side wall of the infiltration well includes a coarse filter layer and a fine filter layer, the inner wall of the fine filter layer is in contact with the inside of the infiltration well, and the coarse filter layer is arranged around the outside of the fine filter layer.

[0020] Further, a slope-forming layer inclined towards the infiltration well is arranged at the bottom of the water discharge section.

[0021] Further, an interception grille is arranged at the top of the infiltration well.

[0022] The beneficial effects of the above technical solutions are:

[0023] The utility model uses a flexible sealing section at the entrance of the culvert, a rigid sealing section is arranged at the exit or in the middle of the culvert, and a permeable well is arranged between the two, forming a composite sealing and drainage system. The flexible sealing section can filter the accumulated water in the tailings pond and form a gradual sealing. The permeable well directly guides the water filtered by the flexible sealing section into the ground, without the need to set an additional water conduit connected to the outside on the rigid seal, which can effectively solve the problem that the existing sealing structure needs to rely on the water conduit for drainage before the flexible seal forms a complete seal, avoid relying on the external drainage system, and avoid the risk of the seal failure caused by the failure of the external drainage system such as the water conduit. In addition, using the permeable well to infiltrate the filtered water into the ground can not only supplement the groundwater resources, but also avoid the secondary pollution to the environment that may be caused by directly discharging the accumulated water in the tailings pond. Brief Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the utility model.

[0025] Reference Signs: 1 is the flood discharge culvert, 2 is the flexible sealing section, 3 is the rigid sealing section, 4 is the permeable well, 5 is the water discharge section, 6 is the anchor rod, 7 is the steel reinforcement cage, 8 is the drain pipe, 9 is the electric control valve, 10 is the liquid level sensor, 11 is the exhaust pipe, 12 is the intercepting grille, 201 is the gravel layer, 202 is the crushed stone layer, 203 is the fine sand layer, 301 is the first retaining wall, 302 is the second retaining wall, 303 is the concrete section, 304 is the pouring pipe, 401 is the coarse filter layer, 402 is the fine filter layer, 403 is the slope finding layer. Detailed Embodiment

[0026] The following further describes the utility model in detail with reference to the drawings and specific embodiments:

[0027] This embodiment aims to provide a sealing and drainage structure for the flood discharge facilities of the tailings pond, which is mainly used for sealing the culvert of the tailings pond, aiming to solve the problem that the existing sealing structure needs to rely on the water conduit for drainage before the flexible seal forms a complete seal.

[0028] A sealing and drainage structure for the flood discharge facilities of the tailings pond, as Figure 1, including a flood drainage culvert 1, a flexible sealing section 2, a rigid sealing section 3 and a percolation well 4; the entrance of the flood drainage culvert 1 is sealed with a flexible sealing section 2, and the flexible sealing section 2 includes a gravel layer 201, a crushed stone layer 202 and a fine sand layer 203 arranged continuously from outside to inside in sequence. The particle sizes of the gravel layer 201, the crushed stone layer 202 and the fine sand layer 203 gradually decrease, forming a reverse filtration layer for step-by-step filtration. Regarding how to use the gravel layer 201, the crushed stone layer 202 and the fine sand layer 203 to form a flexible sealing section 2 with a multi-stage filtration effect, so as to control seepage failure by using the principle of "hydraulic reverse filtration" and achieve a gradual sealing effect, the existing technologies mentioned in the background technology and the related technologies in this field are mainly adopted, which will not be elaborated here.

[0029] The middle part of the flood drainage culvert 1 is sealed with a rigid sealing section 3. The rigid sealing section 3 is distributed at intervals inside the flexible sealing section 2, so that a water discharge section 5 is formed between the rigid sealing section 3 and the flexible sealing; a percolation well 4 is opened at the bottom of the water discharge section 5, and the percolation well 4 extends downward to the permeable layer.

[0030] The rigid sealing section 3 is mainly used to permanently and tightly seal the flood drainage culvert 1, such as Figure 1 , the rigid sealing section 3 includes a first retaining wall 301, a second retaining wall 302 and a concrete section 303; the first retaining wall 301 and the second retaining wall 302 are masonry walls, mainly providing a role similar to a formwork for the pouring section to facilitate pouring. The first retaining wall 301 and the second retaining wall 302 are sealed at intervals in the middle of the flood drainage culvert 1, and a pouring chamber is formed between the first retaining wall 301 and the second retaining wall 302. A pouring pipe 304 communicating with the pouring chamber is provided on the first retaining wall 301 for pouring concrete into the pouring chamber. The second retaining wall 302 is adjacent to the water discharge section 5; a concrete section 303 is poured between the first retaining wall 301 and the second retaining wall 302.

[0031] Furthermore, anchor rods 6 are anchored downward at the bottom of the pouring chamber. The upper ends of the anchor rods 6 are fixed with a steel reinforcement cage 7, and the steel reinforcement cage 7 is embedded in the concrete section 303 to improve the structural strength of the concrete section 303.

[0032] Furthermore, a drain pipe 8 communicating with the water discharge section 5 and the outside is horizontally provided in the upper part of the rigid sealing section 3. The drain pipe 8 can be a long-term through pipe. When the seepage volume of the flexible sealing section 2 is too large and exceeds the seepage efficiency of the percolation well 4, or when groundwater backfills into the percolation well 4, resulting in the water level in the percolation well 4 rising and overflowing to the water discharge section 5, the rigid sealing can first block the accumulated water. However, when the water level in the water discharge section 5 continues to rise to the height of the drain pipe 8, the accumulated water will be discharged to the outside through the drain pipe 8, and too large water pressure is formed in the water discharge section 5.

[0033] Further, in order to more flexibly control the water level when there is water accumulation in the water discharge section 5, an electric control valve 9 is provided at one end of the water discharge section 5 where the drain pipe 8 is located, and a liquid level sensor 10 is provided at the top of the water discharge section 5. The electric control valve 9 and the liquid level sensor 10 are connected for control. The electric control valve 9 uses a valve body integrated with a controller and a mobile power source. The liquid level sensor 10 can detect the change of the liquid level in the water discharge section 5 in real time. Under normal circumstances, the drain pipe 8 is closed, but when there is water accumulation in the water discharge section 5 and the water level rises too fast, the electric control valve 9 is activated and the drain pipe 8 is opened for drainage and pressure reduction.

[0034] Further, an exhaust pipe 11 communicating the water discharge section 5 with the outside is provided through the rigid plugging section 3. The exhaust pipe 11 is located above the drain pipe 8 to ensure the stability of the air pressure inside and outside the water discharge section 5.

[0035] Further, the side wall of the infiltration well 4 includes a coarse filter layer 401 and a fine filter layer 402. The inner wall of the fine filter layer 402 is in contact with the inside of the infiltration well 4, and the coarse filter layer 401 is arranged around the outside of the fine filter layer 402. This is mainly considered because the accumulated water that enters the infiltration well 4 through the flexible plugging section 2 has been filtered. However, due to factors such as precipitation, the groundwater may rise and backfill into the infiltration well 4. There are still sundries in the groundwater that backfills into the infiltration well 4 from the ground. The coarse filter layer 401 and the fine filter layer 402 are mainly used to filter the groundwater that backfills into the infiltration well 4.

[0036] Further, a slope-forming layer 403 inclined towards the infiltration well 4 is provided at the bottom of the water discharge section 5 to ensure that the water in the water discharge section 5 flows smoothly into the infiltration well 4.

[0037] Further, an interception grille 12 is provided at the top of the infiltration well 4, which is mainly used to intercept large sundries that may exist in the infiltration well 4 and can prevent workers from falling during the construction period.

Claims

1. A plugging and drainage structure for tailings pond flood discharge facilities, characterized in that: It comprises a flood discharge culvert (1), a flexible blocking section (2), a rigid blocking section (3) and an infiltration well (4); The entrance of the flood discharge culvert (1) is sealed with a flexible sealing section (2); The middle portion of the flood discharge culvert (1) is sealed with a rigid sealing section (3), and a water discharge section (5) is formed between the rigid sealing section (3) and the flexible sealing section (2); An infiltration well (4) is provided at the bottom of the drainage section (5), and the infiltration well (4) extends downward to the permeable layer.

2. The plugging and drainage structure of a tailings pond flood discharge facility according to claim 1, characterized in that: The flexible plugging section (2) comprises a gravel layer (201), a crushed stone layer (202) and a fine sand layer (203) which are arranged in sequence from the outside to the inside, and the particle sizes of the gravel layer (201), the crushed stone layer (202) and the fine sand layer (203) gradually decrease.

3. The blocking and drainage structure of a tailings pond flood discharge facility according to claim 1, characterized in that: The rigid blocking section (3) comprises a first retaining wall (301), a second retaining wall (302) and a concrete section (303); The first retaining wall (301) and the second retaining wall (302) are arranged in a spaced-apart manner in the middle of the flood discharge culvert (1); a casting chamber is formed between the first retaining wall (301) and the second retaining wall (302); a casting pipe (304) communicating with the casting chamber is passed through the first retaining wall (301); the second retaining wall (302) is adjacent to the water discharge section (5); and a concrete section (303) is cast between the first retaining wall (301) and the second retaining wall (302).

4. The blocking and drainage structure of a tailings pond flood discharge facility according to claim 3, characterized in that: An anchor rod (6) is arranged downwardly at the bottom of the casting chamber, a steel cage (7) is fixed to the upper end of the anchor rod (6), and the steel cage (7) is pre-buried in the concrete section (303).

5. The blocking and drainage structure of a tailings pond flood discharge facility according to claim 3, characterized in that: A drainage pipe (8) is horizontally provided on the upper part of the rigid blocking section (3) and connects the drainage section (5) with the outside world.

6. The plugging and drainage structure of a tailings pond flood discharge facility according to claim 5, characterized in that: An electric control valve (9) is provided at one end of the drainage pipe (8) located at the drainage section (5), a liquid level sensor (10) is provided at the top of the drainage section (5), and the electric control valve (9) and the liquid level sensor (10) are control-connected.

7. The plugging and drainage structure of a tailings pond flood discharge facility according to claim 6, characterized in that: An exhaust pipe (11) is provided in the rigid blocking section (3) and is connected to the drainage section (5) and the outside world. The exhaust pipe (11) is located above the drainage pipe (8).

8. The plugging and drainage structure of a tailings pond flood discharge facility according to claim 1, characterized in that: The side wall of the infiltration well (4) comprises a coarse filter layer (401) and a fine filter layer (402), the inner wall of the fine filter layer (402) is in contact with the inside of the infiltration well, and the coarse filter layer (401) is arranged around the outside of the fine filter layer (402).

9. The plugging and drainage structure of a tailings pond flood discharge facility according to claim 1, characterized in that: The bottom of the drainage section (5) is provided with a slope finding layer (403) inclined towards the infiltration well (4).

10. The plugging and drainage structure of a tailings pond flood discharge facility according to claim 1, characterized in that: An interception grid (12) is provided at the top of the infiltration well (4).

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