Cleaning and drainage combined structure of tailings pond

Abstract

A cleaning and draining combined structure of a tailing pond comprises a tailing pond dam body, a dry beach area is close to the right side of the tailing pond dam body, and deposited tailings, muddy water and clear water are sequentially close to the right side of the dry beach area. A drainage well is arranged on the muddy water, the bottom end of the drainage well is connected with a culvert, and an air cushion floating bridge is arranged on the drainage well and connected to clear water; a siphon is laid on the air cushion floating bridge, one end of the siphon is located in clear water, the other end of the siphon is located in the drainage well, one end of the siphon is a siphon water inlet, the other end of the siphon is a siphon water outlet, and the siphon water outlet is lower than the siphon water inlet; the sedimentation area is subjected to reservoir emptying through stoping tailings, muddy water close to the sedimentation area is gradually settled into clear water and directly overflows into the drainage well, and if the water quality does not completely meet the requirement after reservoir emptying, the clear water is taken and drained into the drainage well through a siphon; the problems that sewage treatment burden and sewage treatment cost are increased due to the fact that muddy water directly enters the drainage well and the culvert are solved, and the flood prevention capacity in the flood season is improved through the combined structure.

Description

A clean drainage combination structure for tailings ponds Technical Field

[0001] This utility model relates to the field of tailings dam drainage in metal mines, and in particular to a clean drainage combination structure for tailings dams. Background Technology

[0002] In the later stages of operation, tailings dams in metal mines cannot be raised further due to "safety over-height" restrictions. The water level in the drainage wells cannot continue to rise. As the dry beach of the tailings dam continues to extend, the settlement area gradually approaches the spillway. This results in the overflow water, which is saturated with heavy metals and tailings particles, entering the drainage wells directly without sufficient sedimentation and dilution. The water then flows through culverts to the sewage treatment plant. Various heavy metal detection indicators are far higher than the planned indicators, making it difficult for the treated sewage to meet standards, and the cost of sewage treatment is increasing year by year.

[0003] The instability of mining operations and seasonal rainfall variations cause tailings wastewater production to fluctuate significantly within a given timeframe. During the flood season, tailings dam drainage becomes even more challenging, making it difficult to meet discharge standards and posing significant environmental risks. Therefore, upgrading tailings discharge technology is crucial. Common solutions include increasing wastewater treatment plant capacity, constructing new transfer overflow sedimentation tanks, or raising the height of tailings dam dams and drainage wells. While these methods address some issues, they involve high initial investment, high operating costs, limited practicality, and certain technical limitations. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of existing technologies, such as high initial investment, high operating costs and poor operability, and to provide a clean drainage combination structure for tailings ponds.

[0005] The technical solution adopted by this utility model to solve its technical problem is a clean drainage combination structure for a tailings dam, including a tailings dam body. The right side of the tailings dam body is a tailings and wastewater collection and discharge site. The area adjacent to the right side of the tailings dam body is a dry beach area with dry beach tailings piled up. The area adjacent to the right side of the dry beach area is a sedimentation area with sedimented tailings piled up. The area adjacent to the right side of the sedimentation area is a turbid water area with turbid water. The area adjacent to the right side of the turbid water area is a clear water area with clear water.

[0006] A drainage well is installed over the turbid water, and a culvert is connected to the bottom of the drainage well. An air-cushioned floating bridge is installed over the drainage well and connected to the clear water area. A siphon pipe is laid on the air-cushioned floating bridge, with one end of the siphon pipe in the clear water and the other end in the drainage well. The opening of the siphon pipe in the clear water is the siphon inlet, and the opening of the siphon pipe in the drainage well is the siphon outlet. The siphon outlet is lower than the siphon inlet.

[0007] The sedimentation area is emptied by mining tailings. The turbid water near the sedimentation area gradually settles into clear water and overflows directly into the drainage well. If the water quality does not fully meet the requirements after emptying the reservoir, clear water is taken and discharged into the drainage well through the siphon inlet and then through the siphon outlet.

[0008] Furthermore, the siphon pipe is equipped with a water injection hose, through which water is injected before drainage.

[0009] Furthermore, the water injection hose is equipped with a water inlet valve, and the siphon outlet is equipped with a siphon outlet valve, both of which are automatically opened and closed.

[0010] Furthermore, the siphon inlet can be installed in any area of ​​clean water.

[0011] Furthermore, a monitoring point is set on the top of the drainage well; a remote observation platform is set at one end of the air cushion pontoon bridge near the siphon inlet, and a remote observation point is installed on the remote observation platform for automatic monitoring.

[0012] Furthermore, the air cushion pontoon bridge is composed of multiple pontoon bridge interlocking planks, which are assembled and interlocked to form the air cushion pontoon bridge.

[0013] Furthermore, the sedimentation area has a mining boundary, and the mined sediment tailings are located within the mining boundary, which can be adjusted according to safety requirements and actual needs.

[0014] This utility model has the following beneficial technical effects:

[0015] This design solves the problem of turbid water directly entering drainage wells and culverts, ultimately increasing the burden and cost of sewage treatment. Simultaneously, this combined structure improves flood control capabilities during the rainy season and addresses the issue of selectively discharging clean water from distant locations or selectively activating both systems simultaneously to increase drainage capacity when tailings storage is delayed or water quality does not meet requirements. This combined structure features simple technology, safety and reliability, easy operation, high automation, clean and energy-saving wastewater discharge without the need for power, visualized monitoring, strong practicality, low investment, wide applicability, and good results. Attached Figure Description

[0016] Figure 1 is a schematic diagram of the tailings pond layout according to an embodiment of the clean drainage combined structure of the tailings pond of this utility model;

[0017] Figure 2 is a cross-sectional view of AA in Figure 1;

[0018] Figure 3 is a schematic diagram of the siphon pipe and water injection of a tailings dam clean drainage combined structure embodiment of this utility model.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Tailings dam body; 2. Dry tailings; 3. Sedimentary tailings; 4. Turbid water; 5. Clear water; 6. Drainage well; 7. Air cushion floating bridge; 8. Siphon pipe; 9. Siphon inlet; 10. Siphon outlet; 11. Siphon outlet valve; 12. Water intake inlet valve; 13. Floating bridge remote observation platform; 14. Floating bridge remote observation point; 15. Monitoring point; 16. Culvert; 17. Floating bridge overlapping planks; 18. Water intake injection hose; 19. Mining boundary. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] Referring to Figure 1, this embodiment includes a tailings dam 1. The right side of the tailings dam 1 is a tailings collection and wastewater discharge site. The right side of the tailings dam 1 has, in sequence, a dry beach area, a sedimentation area (recovery area), a turbid water area 4, and a clear water area 5. The dry beach area contains dry tailings 2, the sedimentation area contains sediment tailings 3, the turbid water area 4 contains turbid water 4, and the clear water area 5 contains clear water 5. However, each area does not only contain the corresponding objects. For example, there is a small amount of sediment tailings 3 in the dry beach area and a little turbid water 4 in the sedimentation area.

[0023] Referring to Figures 1 and 2, a drainage pipe, a culvert, and an air-cushioned floating bridge 7 are installed in the turbid water 4. The bottom end of the drainage well 6 is connected to the culvert 16. The part of the drainage well 6 located on the surface of the turbid water 4 is connected to the air-cushioned floating bridge 7, and the air-cushioned floating bridge 7 is connected to the clear water 5 area. A siphon pipe 8 is laid on the air-cushioned floating bridge 7. One end of the siphon pipe 8 is located in the clear water 5, and the other end is located in the drainage well 6. The opening of the siphon pipe 8 in the clear water 5 is the siphon inlet 9, and the opening of the siphon pipe 8 in the drainage well 6 is the siphon outlet 10. The siphon outlet 10 is lower than the siphon inlet 9, so that the clear water 5 can be discharged into the drainage well 6 by using the siphon principle to flow into the culvert.

[0024] Referring to Figures 1, 2, and 3, specifically, the siphon pipe 8 is equipped with a water injection hose 18. Water is first injected through the water injection hose 18 before drainage, thereby achieving siphon drainage. The water injection hose 18 is equipped with a water inlet valve 12, and the siphon outlet 10 is equipped with a siphon outlet valve 11. Both the water inlet valve 12 and the siphon outlet valve 11 are automatically opening and closing. In practice, the siphon inlet 9 of the siphon pipe 8, which is connected to the air cushion bridge 7, can be located in any area of ​​clean water 5, as long as the siphon inlet 9 is within the clean water 5.

[0025] Referring to Figure 2, a monitoring point 15 is provided on the top of the drainage well 6; a floating bridge remote observation platform 13 is provided at one end of the air cushion floating bridge 7 near the siphon inlet 9, and a floating bridge remote observation point 14 is installed on the floating bridge remote observation platform 13 for automatic monitoring.

[0026] In addition, the air cushion pontoon bridge 7 is composed of multiple pontoon bridge connecting planks 17, which are assembled and connected to form the air cushion pontoon bridge 7.

[0027] In this embodiment, the sedimentary tailings 3 are tailings deposited from the extension of the dry beach area, causing the water quality in the sedimentation area to deteriorate and become turbid water 4. The sedimentary tailings 3 needs to be recycled to empty the reservoir so that the turbid water 4 gradually becomes clear water 5, which can then overflow directly to the drainage well 6. In addition, when mechanical equipment is recycling tailings in the recycling area, the water quality often deteriorates and becomes turbid water 4. At this time, the principle of siphon can be used to discharge the clear water 5 from a distance to the drainage well 6. However, tailings recycling is usually intermittent. If the stop time is long, the turbid water 4 near the drainage well will gradually clarify into clear water 5. When the water quality meets the requirements, the clear water 5 in the turbid water area can be discharged to the drainage well nearby by appropriately raising the water level, installing a motorized baffle in the drainage well, or using a shorter siphon pipe. This is simpler, more direct, more convenient, and the cost can be slightly reduced. However, this situation generally depends on the interval of tailings recycling and whether the clarified water can meet the requirements for direct discharge, and is relatively rare.

[0028] Before mining tailings 3, a special safe mining plan needs to be developed and a mining boundary 19 needs to be designed. The mined tailings can only be within the mining boundary 19. The mining boundary 19 can be adjusted according to safety requirements and actual needs.

[0029] The above are all preferred embodiments of this utility model, and are not intended to limit the scope of protection of this utility model. Identical components are represented by the same reference numerals. It should be noted that the terms "front," "rear," "left," "right," "up," and "down" used in the following description refer to directions in the accompanying drawings, while the terms "inner" and "outer" refer to directions toward or away from the geometric center of a specific component. Therefore, all equivalent changes made to the structure, shape, and principle of this utility model should be included within the scope of protection of this utility model.

Claims

1. A clean drainage combination structure for tailings dams, characterized in that, Includes a tailings dam (1), and the right side of the tailings dam (1) is a site for the collection and discharge of tailings and wastewater from the tailings dam; The area to the right of the tailings dam (1) is a dry beach area with dry beach tailings (2) piled up. The area to the right of the dry beach area is a sedimentation area with sediment tailings (3) piled up. The area to the right of the sedimentation area is a turbid water (4) area with turbid water (4). The area to the right of the turbid water (4) area is a clear water (5) area with clear water (5). A drainage well (6) is set on the turbid water (4). The bottom of the drainage well (6) is connected to a culvert (16). An air cushion floating bridge (7) is set on the drainage well (6) and connected to the clear water (5) in the clear water (5) area. A siphon pipe (8) is laid on the air cushion floating bridge (7). One end of the siphon (8) is located in the clear water (5) and the other end is located in the drainage well (6). The opening of the siphon (8) in the clear water (5) is the siphon inlet (9), and the opening of the siphon (8) in the drainage well (6) is the siphon outlet (10). The siphon outlet (10) is lower than the siphon inlet (9). The sedimentation area is emptied by mining tailings. The turbid water (4) near the sedimentation area gradually settles into clear water (5) and overflows directly into the drainage well (6). If the water quality does not fully meet the requirements after emptying the reservoir, clear water (5) is taken and enters through the siphon (8) inlet and then drained into the drainage well (6) through the siphon outlet (10).

2. The clean drainage combined structure of a tailings dam according to claim 1, characterized in that, The siphon pipe (8) is equipped with a water injection hose (18), through which water is injected and then drained.

3. The clean drainage combined structure of a tailings dam according to claim 2, characterized in that, The water injection hose (18) is equipped with a water inlet valve (12), and the siphon outlet (10) is equipped with a siphon outlet valve (11). Both the water inlet valve (12) and the siphon outlet valve (11) are automatically opened and closed.

4. The clean drainage combined structure of a tailings dam according to claim 1, characterized in that, The siphon inlet (9) can be set in any area of ​​clean water (5).

5. The clean drainage combined structure of a tailings dam according to claim 1, characterized in that, The top of the drainage well (6) is equipped with a monitoring point (15); the air cushion pontoon (7) is equipped with a pontoon remote observation platform (13) at one end near the siphon inlet (9), and the pontoon remote observation platform (13) is equipped with a pontoon remote observation point (14) for automatic monitoring.

6. The clean drainage combined structure of a tailings dam according to claim 1, characterized in that, The air cushion pontoon (7) is composed of multiple pontoon bridge interlocking planks (17), which are assembled and interlocked to form the air cushion pontoon (7).

7. The clean drainage combined structure of a tailings dam according to claim 1, characterized in that, The sedimentation area has a mining boundary (19), the mined sediment tailings (3) are within the mining boundary (19), and the mining boundary (19) can be adjusted according to safety requirements and actual needs.

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