Integrated system for intercepting and draining water from dump of open pit mine and storing water underground

Abstract

The application provides an open-pit mine dump water interception and underground water storage integrated system, which comprises a water interception ditch, a sand setting tank and a water storage tank, the water interception ditch is arranged around the outer periphery of a mine dump and is arranged at the joint of a slope surface area and a slope foot area, the sand setting tank is arranged in the slope foot area and is located on the side of the water interception ditch far from the slope surface area, a first connecting pipe is arranged between the water inlet of the sand setting tank and the water interception ditch, a sand setting structure is arranged in the sand setting tank, and a second connecting pipe is arranged between the water outlet of the sand setting tank and the water storage tank. The application can greatly improve the utilization rate of water resources of the open-pit mine, reduce the waste of water resources, and can be applied to the loose rock soil and strong runoff scouring environment of a mine.

Description

Technical Field

[0001] This invention relates to the field of open-pit mine spoil heap technology, and in particular to an integrated system for intercepting and draining water and underground water storage in open-pit mine spoil heaps. Background Technology

[0002] Sedimentation tanks are specialized structures used in drainage engineering, water treatment, and mine interception and drainage systems to remove heavier inorganic particles such as mud, sand, gravel, and rock debris from water bodies based on the principle of gravity separation.

[0003] Existing sedimentation tanks have poor erosion resistance. In open-pit mines with loose soil and strong rainwater runoff, they are prone to problems such as leakage, collapse, and deformation. Furthermore, they lack water storage and water reuse designs, making it impossible to intercept rainwater, collect groundwater, and replenish ecological water, resulting in water waste. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. To this end, embodiments of this invention provide an integrated system for intercepting and draining wastewater from open-pit mine spoil heaps and for underground water storage, which can reduce water resource waste.

[0005] This invention proposes an integrated system for interception and drainage and underground water storage in an open-pit mine spoil heap. The system includes a spoil heap with a top, top, and bottom area. It also includes an interception ditch, a sedimentation tank, and a water storage tank. The interception ditch is arranged around the perimeter of the spoil heap and located at the junction of the top and bottom areas to intercept natural water flowing from the spoil heap. The sedimentation tank is located in the bottom area, on the side of the interception ditch away from the top area. The sedimentation tank has an inlet and an outlet. The inlet of the sedimentation tank is connected to the interception ditch via a first connecting pipe to allow water collected in the interception ditch to flow into the sedimentation tank. The sedimentation tank contains a sedimentation structure to separate sand carried in the water. The water storage tank is connected to the outlet of the sedimentation tank via a second connecting pipe to collect the water after sand-water separation.

[0006] In some embodiments, the slope area is formed with several gullies that connect the top and bottom of the slope, and the water accumulated in the top of the slope flows along the gullies to the bottom of the slope.

[0007] In some embodiments, multiple underground pipes are buried in the gully area of ​​the slope area. The underground pipes are arranged along the length of the gully and at an angle to the gully. Multiple water inlets are opened on the side of the underground pipe facing the surface of the gully. The top of the underground pipe is close to the top of the slope area, and the bottom of the underground pipe is connected to the intercepting ditch. Each water inlet of the underground pipe is equipped with a filter device. The underground pipe is used to collect part of the natural water that seeps into the mine spoil heap.

[0008] In some embodiments, a water collection pool is provided at the top of the slope to collect natural water from the top of the slope, and the water collection pool is connected to the gully.

[0009] In some embodiments, the sedimentation structure includes a sedimentation well, with the inlet of the sedimentation tank located at the lower part of the sedimentation well and the outlet located at the upper part of the sedimentation well, so as to deposit the sand carried in the water to the bottom of the sedimentation well and discharge the separated clean water into the sedimentation tank.

[0010] In some embodiments, a gabion retaining wall is constructed around the lower outer side of the sedimentation well.

[0011] In some embodiments, the sedimentation tank has a flared structure with a wider top and a narrower bottom, and the inner wall of the sedimentation tank is lined with a protective layer.

[0012] In some embodiments, the protective layer includes a geotextile layer and an impermeable fabric layer, with the impermeable fabric layer laid between the inner wall of the sedimentation tank and the geotextile layer, and the geotextile layer and the impermeable fabric layer bonded and fixed together.

[0013] In some embodiments, the outer side of the protective layer extends to the outer edge of the sedimentation tank, and the protective layer is fixedly connected to the outer edge of the sedimentation tank by anchors. Ecological bags are stacked along the two side walls of the sedimentation tank, and the ecological bags are filled with ecological soil. The inner side of the protective layer extends to the outer wall of the sedimentation well. The protective layer and the outer wall of the sedimentation well are tightly fitted and sealed and fixedly connected. The outlet of the sedimentation well is located above the protective layer at the sedimentation well. The second connecting pipe passes through the protective layer and the ecological bags.

[0014] In some embodiments, the water storage tank is a PP module water storage tank. Attached Figure Description

[0015] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings. in: Figure 1 This is a schematic diagram of the integrated system for intercepting and draining wastewater and underground water storage in an open-pit mine spoil heap according to an embodiment of the present invention; Figure 2 A schematic diagram of burying pipes inside a gully. Figure 3 for Figure 1 A schematic diagram of the grit chamber structure; Figure label: 1. Slope top area; 2. Slope surface area; 3. Slope toe area; 4. Sump; 5. Gully; 6. Intercepting ditch; 7. First connecting pipe; 8. Sedimentation basin; 9. Second connecting pipe; 10. Water storage tank; 11. Underground pipe; 12. Sedimentation well; 13. Gabion retaining wall; 14. Anchor; 15. Gabion mesh layer; 16. Impermeable fabric layer; 17. Geotextile layer; 18. Ecological bag. Detailed Implementation

[0016] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0017] The following description, with reference to the accompanying drawings, describes an embodiment of the integrated system for intercepting and draining waste rock dumps and underground water storage of the present invention.

[0018] like Figures 1-3 As shown in the figure, this embodiment of the invention proposes an integrated system for interception and drainage and underground water storage in an open-pit mine spoil heap, including a mine spoil heap with a top area 1, a slope area 2, and a foot area 3. It also includes: an interception ditch 6, a sedimentation tank 8, and a water storage tank 10. The interception ditch 6 is arranged around the periphery of the mine spoil heap and is located at the junction of the slope area 2 and the foot area 3 to intercept natural water flowing down from the mine spoil heap. The sedimentation tank 8 is located in the foot area 3 and on the side of the interception ditch 6 away from the slope area 2. The sedimentation tank 8 has an inlet and an outlet. The inlet of the sedimentation tank 8 is connected to the interception ditch 6 via a first connecting pipe 7 to allow water collected in the interception ditch 6 to flow into the sedimentation tank 8. The sedimentation tank 8 has a sedimentation structure to separate sand carried in the water. The water storage tank 10 is connected to the outlet of the sedimentation tank 8 via a second connecting pipe 9 to collect the water after sand-water separation.

[0019] This invention, through the installation of an intercepting ditch 6, a sedimentation tank 8, and a water storage tank 10, can significantly improve the utilization rate of open-pit mine water resources and reduce water waste. The entire system requires no electrical equipment, eliminating the hassle of electricity, and is suitable for loose rock and soil and strong runoff environments in mines. Specifically, the intercepting ditch 6 effectively intercepts natural water flowing down from the mine spoil heap; the sedimentation tank 8 settles the natural water, improving its cleanliness; and the water storage tank 10 collects the settled water for later use, such as for mine ecological water replenishment, dust suppression, and greening irrigation.

[0020] Furthermore, the bottom of the intercepting ditch 6 is an inclined surface with a lowest point. An outlet is opened at the lowest point and connected to the first connecting pipe 7, so that the water in the intercepting ditch 6 can flow quickly into the sedimentation well 12.

[0021] Furthermore, the inner side of the intercepting ditch 6 is lined with ecological bags 18 to filter out silt particles.

[0022] Furthermore, the sedimentation tank 8 can come in various shapes, designed according to actual needs.

[0023] Furthermore, both the first connecting pipe 7 and the second connecting pipe 9 are buried underground. The bottom surface of the water storage tank 10 is lower than the bottom surface of the sedimentation tank 8 by a certain height, forming a height difference. The second connecting pipe 9 is inclined downward at the end connected to the water storage tank 10, ensuring that the water in the sedimentation tank 8 can be transported to the water storage tank 10 by its own gravity.

[0024] Furthermore, the outlet of the sedimentation tank 8 is located at the upper part of the sedimentation tank 8, and a control valve is connected to the outlet of the sedimentation tank 8. The control valve is normally open. When the water storage tank 10 is full or water quality problems prevent water from being continuously supplied to the water storage tank 10, the control valve can be closed. At this time, the sedimentation tank 8 can also serve as a temporary water storage device.

[0025] In some embodiments, such as Figure 1 As shown, the slope area 2 has several gullies 5, which connect the top area 1 and the bottom area 3. The water accumulated in the top area 1 flows along the gullies 5 to the bottom area 3.

[0026] It should be noted that gully 5 can be formed naturally by rainfall erosion, or it can be artificially excavated according to actual needs.

[0027] Furthermore, ecological bags 18 are laid inside the gully 5 to perform preliminary filtration of the coarse mud and sand particles washed away.

[0028] In some embodiments, such as Figure 2 As shown, multiple underground pipes 11 are buried in the gully 5 of the slope area 2. The underground pipes 11 are arranged along the length of the gully 5 and at an angle approximately equal to the inclination of the gully 5. Multiple water inlets are opened on the side of the underground pipes 11 facing the surface of the gully 5. The top of the underground pipes 11 is close to the top of the slope area 1, and the bottom of the underground pipes 11 is connected to the intercepting ditch 6. Each water inlet of the underground pipes 11 is equipped with a filter device. The underground pipes 11 are used to collect some of the natural water that seeps into the mine spoil heap. By setting up the underground pipes 11, the amount of rainwater collected can be increased.

[0029] Furthermore, the concealed tube 11 is made of HDPE material.

[0030] Furthermore, the underground pipe 11 is buried at a vertical depth of 55cm inside the gully 5.

[0031] Furthermore, the filtration device is a filter cloth or filter screen, etc., to prevent sand and gravel from entering the concealed pipe 11 and clogging it.

[0032] In some embodiments, such as Figure 1 As shown, a water collection pool 4 is provided in the hilltop area 1 to collect the natural water in the hilltop area 1. The water collection pool 4 is connected to the gully 5.

[0033] In some embodiments, such as Figure 3As shown, the sedimentation structure includes a sedimentation well 12, the inlet of the sedimentation tank 8 is located at the lower part of the sedimentation well 12, and the outlet is provided at the upper part of the sedimentation well 12 to deposit the sand carried in the water to the bottom of the sedimentation well 12 and discharge the separated clear water into the sedimentation tank 8.

[0034] Understandably, the inlet of the sedimentation well 12 is located above the bottom of the sedimentation well 12. This is to allow sand, gravel, silt and other materials to settle to the bottom of the well so that cleaner water can flow upwards. Moreover, this design will not clog the inlet. The bottom of the well can be cleaned regularly or irregularly to prevent the silt from accumulating and causing the inlet to become clogged over time.

[0035] Furthermore, the outlet of the sedimentation well 12 is located above the outlet of the sedimentation tank 8 to prevent water in the sedimentation tank 8 from flowing back into the sedimentation well 12.

[0036] Furthermore, the sedimentation well 12 is formed by permeable bricks, and the permeability coefficient of the permeable bricks is not less than 1 mm / s.

[0037] In some embodiments, such as Figure 3 As shown, a gabion retaining wall 13 is constructed around the lower outer side of the sedimentation well 12, making the structure of the sedimentation well 12 more stable.

[0038] Furthermore, the gabion retaining wall 13 is a wire gabion retaining wall 13.

[0039] In some embodiments, such as Figure 3 As shown, the longitudinal section of the sedimentation tank 8 is an flared structure that is wider at the top and narrower at the bottom, and the inner wall of the sedimentation tank 8 is lined with a protective layer. This prevents water in the sedimentation tank 8 from seeping into the ground or the surrounding soil, thus avoiding waste of water resources.

[0040] Furthermore, the sedimentation tank 8 is 5m long, 3m wide at the top, and 1.5m high.

[0041] In some embodiments, such as Figure 3 As shown, the protective layer includes a geotextile layer 17 and an impermeable fabric layer 16. The impermeable fabric layer 16 is laid between the inner wall of the sedimentation tank 8 and the geotextile layer 17, and the geotextile layer 17 and the impermeable fabric layer 16 are bonded and fixed together.

[0042] Furthermore, the geotextile layer 17 and the impermeable fabric layer 16 are bonded and fixed together with KS hot melt adhesive.

[0043] Furthermore, the reserved expansion allowance of geotextile layer 17 is 5%, and the overlap width of two adjacent geotextiles at the joint is 20~30cm.

[0044] In some embodiments, such as Figure 3As shown, the outer side of the protective layer extends to the outer edge of the sedimentation tank 8. The protective layer is fixedly connected to the outer edge of the sedimentation tank 8 by anchors 14. Ecological bags 18 are stacked along the two side walls of the sedimentation tank 8. Ecological bags 18 are filled with ecological soil. The inner side of the protective layer extends to the outer wall of the sedimentation well 12. The protective layer and the outer wall of the sedimentation well 12 are tightly fitted and sealed and fixedly connected. The outlet of the sedimentation well 12 is located above the protective layer at the sedimentation well 12. The second connecting pipe 9 passes through the protective layer and the ecological bag 18.

[0045] By setting up the ecological bag 18, on the one hand, the soil inside the ecological bag 18 can be planted with grass and greenery, taking into account both soil and water conservation and ecological restoration of the spoil heap, which meets the requirements of mine ecological management. On the other hand, the ecological bag 18 can also ensure the stability of the sedimentation tank 8 and prevent the sedimentation tank 8 from collapsing.

[0046] It is understandable that the ecological bags 18 installed in the gully 5 and the intercepting ditch 6 also serve the purpose of planting grass and greening.

[0047] Furthermore, several anchoring trenches can be opened along the outer edge of the sedimentation tank 8, and the protective layer extends to the anchoring trenches. Anchors 14 are installed in the anchoring trenches and then filled with soil after installation so that the upper surface of the anchors 14 is flush with the ground, which can prevent workers from tripping.

[0048] Furthermore, the anchoring trench is 50cm away from the edge of the sedimentation tank 8. Furthermore, the eco-bags 18 are stacked in an alternating manner along the inclined inner wall of the sedimentation tank 8. The body of the eco-bag 18 is made of polypropylene fabric, and each bag measures 80×40cm. The inside of the bag is filled with eco-friendly soil, and the dimensions of the eco-bag 18 after filling with soil are 60×30×15cm.

[0049] Furthermore, a gabion mesh layer 15 is installed between the protective layer and the ecological bag 18. The gabion mesh layer 15 is arranged in close contact with the protective layer on the side wall of the sedimentation tank 8 and maintains the same inclination angle as the side wall of the sedimentation tank 8. The gabion mesh layer 15 is a hot-dip aluminum-zinc coated low-carbon lead wire structure with an irregular cross-section. The mesh size of the gabion mesh layer 15 is 8×10cm, the tensile strength of the mesh surface is 50KN / m, the diameter of the steel wires constituting the mesh surface is 2.5mm, and the coating amount is 245g / m. 2 A layer of stones with a particle size of 100-300mm is filled inside the gabion mesh layer 15. Ecological bags 18 are stacked on the surface of the gabion mesh layer 15. The ecological bags 18 further ensure the stability of the sedimentation tank 8.

[0050] In some embodiments, the water storage tank 10 is a PP module water storage tank.

[0051] The present invention will be further illustrated by specific embodiments below.

[0052] Example 1 like Figures 1-3 As shown, an integrated system for intercepting and draining water and storing underground water in an open-pit mine spoil heap includes: a collection pool 4, a drainage ditch 6, a sedimentation tank 8, and a storage tank 10. The drainage ditch 6 is arranged around the periphery of the mine spoil heap and is located at the junction of the slope area 2 and the slope foot area 3 to intercept natural water flowing down from the mine spoil heap. The collection pool 4 is located at the top of the slope 1 to collect natural water from the top of the slope 1. The sedimentation tank 8 is located at the slope foot area 3 and is situated on the side of the drainage ditch 6 away from the slope area 2. The sedimentation tank 8 has an inlet and an outlet. The inlet of the sedimentation tank 8 is connected to the drainage ditch 6 via a first connecting pipe 7 to allow water collected in the drainage ditch 6 to flow into the sedimentation tank 8. The sedimentation tank 8 is equipped with a sedimentation structure to separate solid materials such as mud, sand, and gravel carried in the water. The storage tank 10 is connected to the outlet of the sedimentation tank 8 via a second connecting pipe 9 to collect the water after sand-water separation.

[0053] The slope area 2 has several gullies 5, which connect the water collection pool 4 and the slope foot area 3. The water collected in the water collection pool 4 flows along the gullies 5 to the slope foot area 3.

[0054] Ecological bags 18 are laid inside the gully 5 to provide preliminary filtration of coarse silt particles washed away. Ecological bags 18 are also laid on the inner side of the intercepting ditch 6 to filter silt particles.

[0055] Multiple underground pipes 11 are buried in the gully 5 of the slope area 2. The underground pipes 11 are arranged along the length of the gully 5 and at an angle of inclination to the gully 5. Multiple water inlets are opened on the side of the underground pipes 11 facing the surface of the gully 5. The top of the underground pipes 11 is close to the top of the slope area 1, and the bottom of the underground pipes 11 is connected to the intercepting ditch 6. Each water inlet is equipped with a filter device. The underground pipes 11 are used to collect some of the natural water that seeps into the mine spoil heap.

[0056] The sedimentation tank 8 is equipped with a sedimentation well 12. The inlet of the sedimentation tank 8 is located at the lower part of the sedimentation well 12, and the outlet is located at the upper part of the sedimentation well 12 to deposit the sand carried in the water to the bottom of the sedimentation well 12 and discharge the separated clear water into the sedimentation tank 8. A gabion retaining wall 13 is constructed on the outer side of the lower part of the sedimentation well 12.

[0057] The sedimentation tank 8 has a flared structure with a wider top and a narrower bottom. The inner wall of the sedimentation tank 8 is covered with a protective layer. The protective layer includes a geotextile layer 17 and a seepage-proof fabric layer 16. The seepage-proof fabric layer 16 is laid between the inner wall of the sedimentation tank 8 and the geotextile layer 17. The geotextile layer 17 and the seepage-proof fabric layer 16 are bonded and fixed with KS hot melt adhesive.

[0058] The outer side of the protective layer extends to the outer edge of the sedimentation tank 8. The protective layer is fixedly connected to the outer edge of the sedimentation tank 8 by anchors 14. Ecological bags 18 are stacked along the two side walls of the sedimentation tank 8. Ecological bags 18 are filled with ecological soil. The inner side of the protective layer extends to the outer wall of the sedimentation well 12. The protective layer and the outer wall of the sedimentation well 12 are tightly fitted and sealed and fixedly connected. The outlet of the sedimentation well 12 is located above the protective layer at the sedimentation well 12. The second connecting pipe 9 passes through the protective layer and the ecological bags 18.

[0059] Several anchoring trenches can be opened along the outer edge of the sedimentation tank 8. The protective layer extends to the anchoring trenches. Anchors 14 are installed in the anchoring trenches. After installation, the trenches are filled with soil so that the upper surface of the anchors 14 is flush with the ground, which can prevent workers from tripping.

[0060] Ecological bags 18 are stacked in an alternating manner along the inclined inner wall of the sedimentation tank 8. The bags 18 are made of polypropylene fabric, each measuring 80×40cm. They are filled with ecological soil, and the dimensions of the ecological bags 18 after filling with soil are 60×30×15cm.

[0061] A gabion mesh layer 15 is installed between the protective layer and the ecological bag 18. The gabion mesh layer 15 is arranged in close contact with the protective layer on the side wall of the sedimentation tank 8 and maintains the same inclination angle as the side wall of the sedimentation tank 8. The gabion mesh layer 15 is a hot-dip aluminum-zinc coated low-carbon lead wire structure with an irregular cross-section. The mesh size of the gabion mesh layer 15 is 8×10cm, the tensile strength of the mesh surface is 50KN / m, the diameter of the steel wires constituting the mesh surface is 2.5mm, and the coating amount is 245g / m. 2 A layer of stones with a particle size of 100~300mm is filled inside the gabion mesh layer 15. Ecological bags 18 are stacked on the surface of the gabion mesh layer 15.

[0062] The work process includes: (1) Slope runoff inflow stage: Rainfall forms gully 5 runoff in slope area 2. Rainwater carries rock and soil debris, sand and gravel. Part of the rainwater flows into intercepting ditch 6 through gully 5, and the rest of the rainwater infiltrates into the interior of slope area 2. After being collected by underground pipe 11, it flows into intercepting ditch 6.

[0063] (2) Water purification stage of sedimentation well 12: Rainwater from the intercepting ditch 6 enters the sedimentation well 12 through the first connecting pipe 7. The mud and sand carried by the rainwater are deposited at the bottom of the well, and the cleaner rainwater flows upward and flows into the sedimentation pool 8 from the outlet of the sedimentation well 12.

[0064] (3) Water purification stage of sedimentation tank 8: Rainwater enters sedimentation tank 8 and continues to settle. The protective layer inside sedimentation tank 8 can prevent water infiltration. The laid gabion mesh layer 15 and ecological bags 18 can provide support to ensure that sedimentation tank 8 will not collapse. Moreover, the soil in ecological bags 18 can use some of the water for planting grass and greening. In addition, sedimentation tank 8 has a large volume, which can provide sufficient space for sedimentation. When rainwater falls directly into sedimentation tank 8 from the sky or the ground, the control valve at the outlet of sedimentation tank 8 is closed to allow the rainwater to settle fully in sedimentation tank 8. The gabion mesh layer 15 and ecological bags 18 can also intercept some of the mud, sand and gravel carried by rainwater from the ground. When the water quality is basically clear enough to be seen by the naked eye, the control valve is opened to introduce water into the water storage tank 10.

[0065] (4) Water storage stage: When the clear water in the sedimentation tank 8 reaches the drain outlet of the sedimentation tank 8, it flows into the water storage tank 10 through the second connecting pipe 9 for water storage and to realize resource utilization.

[0066] (5) Operation and maintenance phase: After the sediment in the sedimentation tank 8 or sedimentation well 12 has accumulated to a certain amount, it shall be cleaned.

[0067] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0068] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0069] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0070] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0071] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0072] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An integrated system for interception, drainage, and underground water storage in an open-pit mine spoil heap, comprising a spoil heap with a top area, a surface area, and a toe area, characterized in that, Also includes: Interception ditch, which is arranged around the perimeter of the mine spoil heap and is opened at the junction of the slope area and the slope foot area, to intercept natural water flowing down from the mine spoil heap; A sedimentation tank is provided, which is located at the foot of the slope and on the side of the intercepting ditch away from the slope. The sedimentation tank has an inlet and an outlet. The inlet of the sedimentation tank is connected to the intercepting ditch through a first connecting pipe so that the water collected in the intercepting ditch can be introduced into the sedimentation tank. The sedimentation tank is provided with a sedimentation structure to separate the sand carried in the water. A water storage tank is connected to the outlet of the sedimentation tank via a second connecting pipe to collect the water after sand-water separation.

2. The integrated system for intercepting and draining wastewater and underground water storage in open-pit mine spoil heaps according to claim 1, characterized in that, Several gullies are formed on the slope area, which connect the top and bottom of the slope. The water accumulated in the top of the slope flows along the gullies to the bottom of the slope.

3. The integrated system for intercepting and draining wastewater and underground water storage in open-pit mine spoil heaps according to claim 2, characterized in that, Multiple underground pipes are buried in the gully along the slope area. The underground pipes are arranged along the length of the gully and at an angle to the gully. Multiple water inlets are opened on the side of the underground pipe facing the surface of the gully. The top of the underground pipe is close to the top of the slope area, and the bottom of the underground pipe is connected to the intercepting ditch. Each water inlet of the underground pipe is equipped with a filter device. The underground pipe is used to collect part of the natural water that seeps into the mine spoil heap.

4. The integrated system for intercepting and draining waste rock dumps and storing underground water as described in claim 2, characterized in that, A water collection pool is provided at the top of the slope to collect natural water from the top of the slope, and the water collection pool is connected to the gully.

5. The integrated system for intercepting and draining waste rock dumps and storing underground water as described in claim 1, characterized in that, The sedimentation structure includes a sedimentation well, the inlet of the sedimentation tank is located at the lower part of the sedimentation well, and the outlet is provided at the upper part of the sedimentation well, so as to deposit the sand carried in the water to the bottom of the sedimentation well and discharge the separated clear water into the sedimentation tank.

6. The integrated system for intercepting and draining waste rock dumps and storing underground water as described in claim 5, characterized in that, A gabion retaining wall is constructed around the lower outer side of the sedimentation well.

7. The integrated system for intercepting and draining waste rock dumps and underground water storage as described in claim 1, characterized in that, The sedimentation tank has a flared structure with a wider top and a narrower bottom, and the inner wall of the sedimentation tank is lined with a protective layer.

8. The integrated system for intercepting and draining wastewater and underground water storage in open-pit mine spoil heaps according to claim 7, characterized in that, The protective layer includes a geotextile layer and an impermeable fabric layer. The impermeable fabric layer is laid between the inner wall of the sedimentation tank and the geotextile layer, and the geotextile layer and the impermeable fabric layer are bonded and fixed together.

9. The integrated system for intercepting and draining waste rock dumps and storing underground water as described in claim 7, characterized in that, The outer side of the protective layer extends to the outer edge of the sedimentation tank. The protective layer is fixedly connected to the outer edge of the sedimentation tank by anchors. Ecological bags are stacked along the two side walls of the sedimentation tank. The ecological bags are filled with ecological soil. The inner side of the protective layer extends to the outer wall of the sedimentation well. The protective layer is tightly fitted and sealed to the outer wall of the sedimentation well. The outlet of the sedimentation well is located above the protective layer at the sedimentation well. The second connecting pipe passes through the protective layer and the ecological bags.

10. The integrated system for intercepting and draining wastewater and underground water storage in open-pit mine spoil heaps according to claim 1, characterized in that, The water storage tank is a PP module water storage tank.

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