Temporary blocking dam structure for ore drawing of tailing pond in cold region in winter

Abstract

The utility model relates to the technical field of tailing stacking, in particular to a temporary blocking dam structure for winter ore drawing of a tailing pond in a cold region, a temporary blocking dam is arranged between a sub-dam and a winter ore drawing pipe, the blocking dam and the sub-dam are arranged in parallel, two sides of the cross section of the temporary blocking dam are slopes, a pit is arranged at the bottom of the slope on the upstream side, and the temporary blocking dam is arranged in the pit. A plurality of layers of geotechnical cloth are laid on the surface of the slope face of the upstream side in an overlapped mode, a straw mat is laid on the surface of the geotechnical cloth on the lower portion of the slope face, the geotechnical cloth extends to the vertical face or the bottom face of the pit, the straw mat extends to the middle of the vertical face of the pit, and the pit is filled with ore sand to press the geotechnical cloth and the straw mat. The temporary blocking dam is piled up between the sub-dam and the winter ore drawing pipe in winter, during the working period of the winter ore drawing pipe, ore pulp flow of ore drawing in winter is effectively prevented from impacting the sub-dam, and the safety of the sub-dam is guaranteed. And fine particles are prevented from depositing at the bottom of the sub-dam to form a soft layer. Seepage drainage of the sub-dams and dam pushing and building work in the second year are not affected.

Description

Technical Field

[0001] This utility model belongs to the field of tailings accumulation technology, and specifically relates to a temporary retaining dam structure for winter tailings discharge in cold regions. Background Technology

[0002] In cold regions, during winter production at tailings dams, the valves on the branch pipes used for discharging tailings slurry can freeze and break, preventing normal slurry discharge and thus halting production. Therefore, in winter, the tailings slurry discharge pipes are connected to the tailings beach, with one pipe on each side. The large flow rate at the beach causes the tailings slurry to impact the sub-dam, potentially damaging it. Furthermore, the backflow of tailings slurry in front of the sub-dam causes fine-particle tailings to deposit, forming a weak layer that raises the wetting line, increasing the difficulty of dam construction and compromising the safety of the tailings dam. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a temporary retaining dam structure for tailings ponds in cold regions during winter, so as to solve the problem of slurry flow impacting the sub-dam during the ore discharge period in winter.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A temporary retaining dam structure for winter tailings discharge in cold regions is disclosed. The temporary retaining dam is set between a sub-dam and a winter discharge pipe, and the retaining dam and the sub-dam are set parallel to each other. The two sides of the cross-section of the temporary retaining dam are slopes. A pit is set at the bottom of the slope on the water-facing side. Multiple layers of geotextile are laid on the surface of the slope on the water-facing side. Straw mats are laid on the surface of the geotextile at the bottom of the slope. The geotextile extends to the vertical or bottom surface of the pit, and the straw mats extend to the middle of the vertical surface of the pit. The pit is filled with mineral sand to compress the geotextile and straw mats.

[0006] The temporary retaining dam is more than 150 meters away from the sub-dam.

[0007] The temporary retaining dam is 0.5-1 meter lower than the sub-dam.

[0008] The temporary retaining dam has a bottom width of 14-16 meters.

[0009] The slope ratio of the slope is 1:2.

[0010] The pit is 3-3.5 meters deep and 1-1.5 meters wide.

[0011] The geotextile consists of 2-3 layers.

[0012] Compared with existing technologies, the beneficial effects of this utility model are:

[0013] This utility model of a temporary retaining dam is erected between the sub-dam and the winter ore discharge pipe during winter. During the operation of the winter ore discharge pipe, it effectively prevents the ore slurry flow from impacting the sub-dam, ensuring the safety of the sub-dam. It also prevents fine particles from depositing at the bottom of the sub-dam, forming a weak layer. Furthermore, it does not affect the sub-dam's seepage drainage and the subsequent dam construction work the following year.

[0014] Multiple layers of geotextile and straw mats are laid on the water-facing slope of the temporary retaining dam. The geotextile and straw mats are buried deep to improve the strength of the temporary retaining dam and ensure its drainage function. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the tailings dam of the present invention.

[0016] Figure 2 This is a schematic diagram of the structure of the present invention.

[0017] Figure 3 This is a partial enlarged view of the present invention.

[0018] In the diagram: 1. Sub-dam; 2. Winter ore discharge pipe; 3. Retaining dam; 4. Pit; 5. Geotextile; 6. Straw curtain. Detailed Implementation

[0019] In the description of this utility model, it should be understood that the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0020] Unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] like Figures 1-3 A temporary retaining dam structure for winter tailings discharge in cold regions is disclosed. The temporary retaining dam 3 is set between the sub-dam 1 and the winter discharge pipe 2. The retaining dam 3 is set parallel to the sub-dam 1. The two sides of the cross section of the temporary retaining dam 3 are slopes. A pit 4 is set at the bottom of the slope on the water-facing side. Multiple layers of geotextile 5 are laid on the surface of the slope on the water-facing side. Straw mats 6 are laid on the surface of the geotextile 5 at the bottom of the slope. The geotextile 5 extends to the vertical or bottom surface of the pit 4. The straw mats 6 extend to the middle of the vertical surface of the pit 4. The pit 4 is filled with mineral sand to compress the geotextile 5 and the straw mats 6.

[0022] The temporary retaining dam 3 is more than 150 meters away from the sub-dam 1.

[0023] The temporary retaining dam 3 is 0.5-1 meter lower than the sub-dam 1.

[0024] The lower width of the temporary retaining dam 3 is 14-16 meters.

[0025] The slope ratio of the slope is 1:2.

[0026] The pit 4 has a depth of 3-3.5 meters and a width of 1-1.5 meters.

[0027] The geotextile 5 mentioned above consists of 2-3 layers.

[0028] When the ambient temperature drops to 5-10℃, a temporary retaining dam is constructed. During winter, a winter ore discharge pipe is used to drain the slurry. After the winter ore discharge is completed, the temporary retaining dam is dismantled. This effectively prevents the slurry flow from impacting the sub-dam during winter ore discharge, ensuring the sub-dam's safety. It also prevents fine particles from depositing at the bottom of the sub-dam, forming a weak layer. It does not affect the sub-dam's seepage drainage and the subsequent dam construction work the following year.

[0029] To make the objectives, technical solutions, and technical effects of this utility model clearer, the technical solutions in the embodiments of this utility model are now described clearly and completely. However, the embodiments described below are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art in conjunction with the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] Example 1:

[0031] A temporary retaining dam structure for winter tailings discharge in cold regions is provided. The temporary retaining dam 3 is set between the sub-dam 1 and the winter ore discharge pipe 2. The sub-dam 1 is 3.5 meters high. The retaining dam 3 is set parallel to the sub-dam 1. The temporary retaining dam 3 is 4 meters wide at the top, 14 meters wide at the bottom, 2.5 meters high on average, and 1200 meters long.

[0032] The temporary retaining dam 3 has slopes on both sides with a slope ratio of 1:2. A pit 4 is constructed at the bottom of the water-facing slope, with a depth of 3 meters and a width of 1 meter. Two layers of geotextile 5 are laid on the surface of the water-facing slope. Straw mats 6 are laid on the surface of the geotextile 5 at the bottom of the slope. The geotextile 5 extends to the vertical or bottom surface of the pit 4, and the straw mats 6 extend to the middle of the vertical surface of the pit 4. The pit 4 is filled with mineral sand to compact the geotextile 5 and straw mats 6.

[0033] Example 2:

[0034] A temporary retaining dam structure for winter tailings discharge in cold regions is provided. The temporary retaining dam 3 is set between the sub-dam 1 and the winter ore discharge pipe 2. The sub-dam 1 is 3 meters high. The retaining dam 3 is set parallel to the sub-dam 1. The temporary retaining dam 3 is 5 meters wide at the top, 15 meters wide at the bottom, 2.5 meters high on average, and 1250 meters long.

[0035] The temporary retaining dam 3 has slopes on both sides with a slope ratio of 1:2. A pit 4 is constructed at the bottom of the water-facing slope, with a depth of 3.2 meters and a width of 1.2 meters. Two layers of geotextile 5 are laid on the surface of the water-facing slope. Straw mats 6 are laid on the surface of the geotextile 5 at the bottom of the slope. The geotextile 5 extends to the vertical or bottom surface of the pit 4, and the straw mats 6 extend to the middle of the vertical surface of the pit 4. The pit 4 is filled with mineral sand to compact the geotextile 5 and straw mats 6.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and basic spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A temporary retaining dam structure for winter tailings discharge in cold regions, characterized in that, The temporary retaining dam is set between the sub-dam and the winter ore discharge pipe. The retaining dam and the sub-dam are set parallel to each other. The two sides of the cross section of the temporary retaining dam are slopes. A pit is set at the bottom of the slope on the water-facing side. Multiple layers of geotextile are laid on the surface of the slope on the water-facing side. Straw mats are laid on the surface of the geotextile at the bottom of the slope. The geotextile extends to the vertical or bottom surface of the pit. The straw mats extend to the middle of the vertical surface of the pit. The pit is filled with mineral sand to press the geotextile and straw mats tightly.

2. The temporary retaining dam structure for winter tailings discharge in cold regions according to claim 1, characterized in that, The temporary retaining dam is more than 150 meters away from the sub-dam.

3. The temporary retaining dam structure for winter tailings discharge in cold regions according to claim 1, characterized in that, The temporary retaining dam is 0.5-1 meter lower than the sub-dam.

4. The temporary retaining dam structure for winter tailings discharge in cold regions according to claim 1, characterized in that, The temporary retaining dam has a bottom width of 14-16 meters.

5. A temporary retaining dam structure for winter tailings discharge in cold regions according to claim 1, characterized in that, The slope ratio of the slope is 1:

2.

6. The temporary retaining dam structure for winter tailings discharge in cold regions according to claim 1, characterized in that, The pit is 3-3.5 meters deep and 1-1.5 meters wide.

7. A temporary retaining dam structure for winter tailings discharge in cold regions according to claim 1, characterized in that, The geotextile consists of 2-3 layers.

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