Effective collecting, guiding and discharging system for mine ecological restoration filling body percolate

Abstract

The utility model discloses an effective collecting, guiding and discharging system for mine ecological restoration filling body percolate, which comprises a percolate collecting well arranged in a mine pit; the main drainage blind ditch is communicated with the leachate collecting well; the branch guide drainage blind ditches are communicated with the main guide drainage blind ditches; the percolate water suction pump is arranged at the bottom of the percolate collecting well; and the leachate collecting tank is communicated with the output end of the leachate water suction pump through a drainage pipe. The utility model relates to a long-term effective collecting, guiding and discharging system for mine ecological restoration filling body percolate, which is convenient for enterprises to safely implement mine ecological restoration and timely collect, guide and discharge the percolate in the mine mining pit ecological restoration filling body into a percolate collecting tank. And timely consolidation and settlement stability of the mine ecological restoration filling body are ensured, so that safety and stability of the whole mine ecological restoration project are ensured.

Description

Technical Field

[0001] The utility model relates to an effective collection and drainage system for mine ecological restoration filling body leachate, belonging to the technical field of mine ecological restoration systems. Background Art

[0002] my country is a country rich in mineral resources and has a long history of mining development. Mining development has played an important role in promoting the overall social and economic development and infrastructure construction.

[0003] It requires a lot of funds to carry out ecological restoration of the large number of mine pits left over from the history of mines. In addition, the remaining mine pits are large, and a large amount of backfill soil is needed to fill the mine pits during the ecological restoration process. However, a large amount of backfill soil is difficult to obtain, and the new large amount of backfill soil will cause additional land damage and new environmental problems. Therefore, the country now encourages and supports the use of phosphogypsum and titanium gypsum through harmless modification to achieve a class of general industrial solid waste before using them to fill and repair mine pits.

[0004] The collection and drainage of existing mine filling leachate has the following shortcomings: (a) In order to prevent the leachate of the filling material from penetrating to the bottom of the mine and polluting the groundwater, it is often required to carry out artificial anti-seepage treatment at the bottom and around the mine before filling and repairing the mine. As a result, the leachate in the filling body above the mine anti-seepage layer cannot be discharged; (b) The amount of harmless filling required for mine ecological restoration is huge, and the entire mine ecological restoration work takes a long time and often requires several rainy seasons. During the mine repair process, the rainwater in the mine dissolves the harmless filling material and seeps down to produce a large amount of leachate that cannot be discharged in time; (c) Most of the existing mines are concave-type mines formed by open-pit mining, and the bottom of the mine is located at The traditional leachate drainage method is relatively low. It cannot naturally drain the leachate to the outside of the repaired mine. If the traditional leachate drainage system is used, it is often necessary to drill a leachate drainage tunnel or a leachate drainage pipe at the bottom of the mine, and the investment will be very large; (d) The traditional leachate drainage method drills a leachate drainage tunnel or a leachate drainage pipe at the bottom of the mine. Once it is damaged, it will be difficult to repair, and the entire leachate drainage will fail. It will also cause leachate to seep into the groundwater and cause new environmental problems such as groundwater pollution; (e) The leachate seepage of the ecological restoration filling body of the mine pit is slow, and the traditional leachate drainage method is a time-consuming and lengthy process, which makes it impossible for the ecological restoration filling body to consolidate and settle stably in a short time, affecting the safety and stability of the entire project in the later stage.

[0005] For the above reasons, the use of leachate drainage systems in existing mine pit ecological restoration and filling is very cumbersome and time-consuming, which will consume a lot of manpower and material resources, and the entire implementation process is difficult for enterprises to manage and control. Utility Model Content

[0006] The purpose of the utility model is to provide a system for effectively collecting and draining leachate from filling bodies for ecological restoration of mines in response to the problems existing in the prior art.

[0007] The technical solution provided by the utility model for solving the above-mentioned technical problems is: a mine ecological restoration filling body leachate effective collection and drainage system, comprising: a leachate collection well, the leachate collection well being arranged in a mine pit; a main drainage blind ditch, the main drainage blind ditch being connected to the leachate collection well; a branch drainage blind ditch, the branch drainage blind ditch being connected to the main drainage blind ditch; a leachate pumping pump, the leachate pumping pump being arranged at the bottom of the leachate collection well; a leachate collection tank, the leachate collection tank being connected to the output end of the leachate pumping pump through a drainage pipe.

[0008] A further technical solution is that an anti-seepage layer is laid under the main drainage blind ditch and the branch drainage blind ditch.

[0009] A further technical solution is that the main drainage blind ditch includes a HDPE perforated pipe I, a geotextile I, a permeable gravel layer I, and a geotextile II that are arranged from the inside to the outside.

[0010] A further technical solution is that the HDPE perforated pipe I is a PE80 water pipe with plum blossom-shaped openings with a spacing of 200 mm.

[0011] A further technical solution is that the branch drainage blind ditch includes a HDPE perforated pipe II, a geotextile III, a permeable gravel layer II, and a geotextile IV arranged from the inside to the outside.

[0012] A further technical solution is that the HDPE perforated pipe II is a PE80 water pipe with plum blossom-shaped openings with a spacing of 100 mm.

[0013] A further technical solution is that the drainage system also includes a solar photovoltaic panel, an automatic control switch, an automatic control switch wire, a water pump wire, a sensor wire, and a water level sensor. The automatic control switch is electrically connected to the solar photovoltaic panel, the leachate pump, and the water level sensor through the automatic control switch wire, the water pump wire, and the sensor wire respectively; the water level sensor is arranged on the inner wall of the leachate collection well.

[0014] A further technical solution is that the leachate pump is a small deep water pump.

[0015] The beneficial effects of the utility model are as follows: the utility model is a long-term and effective system for collecting and draining leachate from the filling body of mine ecological restoration, which facilitates enterprises to safely implement mine ecological restoration and timely collect and drain leachate from the filling body of mine mining pit ecological restoration into the leachate collection pool, ensuring that the filling body of mine ecological restoration is consolidated and settled in time to ensure the safety and stability of the entire mine ecological restoration project;

[0016] In addition, the leachate in the ecological restoration filling body of the mining pit is collected in a timely and effective manner and intelligently and automatically drained into the leachate collection pool. The leachate in the leachate collection pool can be discharged into the natural valley only after it is treated to meet the discharge standards. This can effectively prevent the leachate from the ecological restoration filling body of the mining pit from seeping into the ground and causing environmental pollution to the surrounding groundwater bodies. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the plan layout of the utility model;

[0018] Figure 2 It is a cross-sectional schematic diagram of the utility model;

[0019] Figure 3 This is a cross-sectional diagram of the lower part of the leachate collection well;

[0020] Figure 4 The schematic diagram of the structure of the main drainage blind ditch is shown in FIG.

[0021] Figure 5 This is the structural drawing of HDPE perforated pipe I;

[0022] Figure 6 This is a structural diagram of a branch drainage blind ditch;

[0023] Figure 7 This is the structural drawing of HDPE perforated pipe II.

[0024] Description of the drawings: 1. Leachate collection well; 2. Main drainage blind ditch; 3. Branch drainage blind ditch; 4. Solar photovoltaic panel; 5. Automatic control switch; 6. Automatic control switch wire; 7. Water pump wire; 8. Leachate pump; 9. Sensor wire; 10. Water level sensor; 11. Drain pipe; 12. Leachate collection tank; 13. Geotextile I; 14. Permeable gravel layer I; 15. Geotextile II; 16. HDPE perforated pipe I; 17. Geotextile III; 18. Permeable gravel layer II; 19. Geotextile IV; 20. HDPE perforated pipe II. DETAILED DESCRIPTION

[0025] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0026] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections; they may also refer to mechanical connections. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0028] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0029] like Figure 1 As shown, the utility model provides an effective collection and drainage system for leachate of a mine ecological restoration filling body, a leachate collection well 1, which is arranged in a mine pit; a main drainage blind ditch 2 is arranged at the bottom of the mine pit, and the main drainage blind ditch 2 is connected to the leachate collection well 1; a branch drainage blind ditch 3 is arranged at the bottom of the mine pit, and the branch drainage blind ditch 3 is connected to the main drainage blind ditch 2; a leachate pumping pump 8, which is arranged at the bottom of the leachate collection well 1; a leachate collection tank 12, and the leachate collection tank 12 is connected to the output end of the leachate pumping pump 8 through a drainage pipe 11.

[0030] In this embodiment, an anti-seepage layer is provided at the bottom of the mine, and the main drainage blind ditch 2 and the branch drainage blind ditch 3 are placed on the anti-seepage layer.

[0031] The leachate collection well 1 described in this embodiment adopts a cast-in-place reinforced concrete (≥C30) structure and is set at the lowest point of the bottom of the mine pit to facilitate the collection of leachate; the base must be placed on the soil layer to meet the bearing capacity requirements, and the height of the leachate collection well 1 is consistent with the filling thickness of the harmless ecological restoration material of the mine pit. The wall thickness is determined by structural calculation based on the filling and covering thickness of the harmless ecological restoration material of the mine pit, but the thickness is not less than 350mm, and the base thickness is not less than 1.0m. The inner diameter of the leachate collection well 1 can be selected from 1.0m to 2.0m according to the size of the repaired mine pit, but it can be appropriately increased as needed. The number of leachate collection wells 1 can be arranged in intervals according to the size of the repaired mine pit;

[0032] The leachate pump 8 and drain pipe 11 are an effective drainage system for leachate from the filling material in the mine ecological restoration project. Different models of leachate pump 8 can be selected based on the flow rate and lift requirements of the leachate pump 8, depending on the size of the mine ecological restoration area, the amount of leachate from the filling material, the local hydrogeological conditions, and the depth of the leachate collection well 1.

[0033] The branch drainage blind ditch 3 is inclined toward the main drainage blind ditch 2 at a bottom slope of ≥%2 and is connected thereto. The main drainage blind ditch 2 is also inclined toward the leachate collection well 1 at a bottom slope of ≥%2 and is connected thereto.

[0034] This embodiment specifically collects the leachate of the ecological restoration filling body in the entire mine pit through the main drainage blind ditch 2 and the branch drainage blind ditch 3 on the bottom of the mine pit, and transports it to the leachate collection well 1. The leachate pumping pump 8 uses a small deep water pump. The leachate pumping pump 8 is arranged at the bottom of the leachate collection well 1 through a lifting rope. The drainage pipe 11 is connected to the leachate pumping pump 8 and then arranged in the leachate collection pool 12 at the edge of the repair mine pit. The leachate in the ecological restoration filling body of the mine pit is pumped and discharged to the leachate collection pool 12. The leachate in the leachate collection pool 12 is discharged to the surrounding ditches after being treated to meet the standards.

[0035] like Figure 2 As shown, on the basis of this embodiment, in order to realize automatic pumping and drainage of leachate, the preferred implementation method is to further include a solar photovoltaic panel 4, an automatic control switch 5, an automatic control switch wire 6, a water pump wire 7, a sensor wire 9, and a water level sensor 10. The automatic control switch 5 is electrically connected to the solar photovoltaic panel 4, the leachate pump 8, and the water level sensor 10 through the automatic control switch wire 6, the water pump wire 7, and the sensor wire 9 respectively; the water level sensor 10 is arranged on the inner wall of the leachate collection well 1.

[0036] The solar photovoltaic panel 4 is used to power the leachate pump 8. The power of the solar photovoltaic panel 4 can be selected according to the power demand. The solar photovoltaic panel 4 equipped with a power storage device can be selected as needed to power the leachate pump 8 on continuous rainy days.

[0037] The models of the automatic control switch 5 and the water level sensor 10 are selected according to the power of the leachate pumping and drainage pipe 8 and the power generation power of the solar photovoltaic panel 4;

[0038] The water level sensor 10 is arranged at the bottom of the leachate collection well 1 and is located below the bottom elevation of the main drainage blind ditch 2. This position serves as the control water level of the water level sensor 10. When the leachate of the mine (mine pit) ecological restoration filling body is discharged into the leachate collection well 1 through the main drainage blind ditch 2 and the branch drainage blind ditch 3, when the leachate water level in the leachate collection well 1 is higher than the set water level controlled by the water level sensor 10, the water level sensor 10 sends a signal, and the automatic control switch 5 (water level sensing control) automatically turns on the power supply of the leachate pump 8, and the leachate pump 8 starts working and pumps the leachate in the leachate collection well 1 into the leachate collection tank 12 through the drainage pipe 11; when the water level drops below the set water level, the automatic control switch 5 automatically turns off the power supply, and the leachate pump 8 stops working.

[0039] In this way, a mine ecological restoration filling body leachate effective collection and drainage system realizes intelligent automation of the timely and effective collection and drainage process of leachate in the mine pit ecological restoration filling body, and will discharge the leachate in the mine pit ecological restoration filling body in a long-term, timely and effective manner.

[0040] like Figure 4-Figure 7 As shown, in this embodiment, a specific implementation of the main drainage blind ditch 2 and the branch drainage blind ditch 3 is: the main drainage blind ditch 2 includes a HDPE perforated pipe Ⅰ16, a geotextile Ⅰ15, a permeable gravel layer Ⅰ14, and a geotextile Ⅱ13 arranged from the inside to the outside.

[0041] The HDPE perforated pipe I16 is a PE80 water pipe with plum blossom-shaped openings at a spacing of 200 mm, and its diameter D is 300-500 mm; the permeable gravel layer I14 has a thickness of ≥2D, a trapezoidal upper width of ≥2D, and a lower width of ≥6D.

[0042] The branch drainage blind ditch 3 includes a HDPE perforated pipe II 20, a geotextile III 19, a permeable gravel layer II 18, and a geotextile IV 17 which are arranged from the inside to the outside.

[0043] The HDPE perforated pipe II 20 is a PE80 water pipe with plum blossom-shaped openings at a spacing of 100 mm, and its diameter d is 100-300 mm; the permeable gravel layer II 18 has a thickness of ≥2.5d, a trapezoidal upper width of ≥2.5d, and a lower width of ≥7.5d.

[0044] The specifications of the above geotextiles are ≥400g / m 2 The length and number of the main drainage blind ditch 2 and the branch drainage blind ditch 3 can be determined comprehensively based on the size of the repaired mine pit, the amount of leachate from the filling material and the local hydrogeological conditions.

[0045] Example:

[0046] A historical mine pit began ecological restoration in June 2022. The mine pit is a pit-type mine with a depth of about 40m. The ecological restoration of the mine pit uses phosphogypsum after harmless treatment as the mine pit ecological restoration filling material. The entire restoration period of the mine pit is 5 years. According to the corresponding environmental protection requirements, the entire mine pit needs to be artificially anti-seepage treated before the mine pit is repaired. For this reason, during the mine pit repair and filling period, a large amount of leachate and rainy season leaching are difficult to discharge out of the pit. The traditional leachate drainage method requires a leachate drainage tunnel or leachate drainage pipe to be drilled at the bottom of the pit. The investment is huge and once a problem occurs, it will be difficult to repair. For this reason, the mine pit ecological restoration adopts the utility model, that is, a mine ecological restoration filling body leachate effective collection and drainage system as the leachate collection and drainage system for this mine pit repair.

[0047] See Figure 1-7 The mine ecological restoration enterprise has laid out an effective collection and drainage system for the leachate of the mine ecological restoration filling body in the restoration mine as follows:

[0048] According to the terrain and boundary conditions of the repaired mine pit, six solar photovoltaic panels 4 are laid on the flat area on the west side of the mine pit to provide power for the leachate drainage pump 8;

[0049] According to the size of the repaired pit, the company set up two leachate collection wells 1 at the lowest position of the bottom of the repaired pit;

[0050] According to the size of the repaired pit, the amount of leachate from the filling material and the local hydrogeological conditions, four main drainage blind ditches 2 and several branch drainage blind ditches 3 are laid for each leachate collection well 1 at the bottom of the repaired pit;

[0051] Leachate pumping and drainage pumps 8 are respectively provided in the two leachate collection wells 1 to continuously pump the leachate collected in the two leachate collection wells 1 into the leachate collection pool 12 at the edge of the mine;

[0052] After generating electricity, the solar photovoltaic power generation panel 4 is connected to the automatic control switch 5 via a wire, and then connected to the leachate pumping and drainage pump 8 via a wire to provide power for the leachate pumping and drainage pump 8.

[0053] The leachate collection well 1 adopts a C35 reinforced concrete cast-in-place structure with a base placed in the bedrock layer. The height of the leachate collection well 1 is 45m, and the wall thickness adopts a gradient type, with a thickness of 500mm in the bottom 10m, a thickness of 450mm from 10m to 30m, and a thickness of 400mm in the top 15m. The base thickness is 1.0m, and the inner diameter of the leachate collection well 1 is 1.5m.

[0054] Since the mine restoration began in June 2022, the mine ecological restoration filling body leachate has been effectively collected and drained by the drainage system. The leachate in the phosphogypsum filling body has been harmlessly treated in the mine pit for about 15m 3 / day, the leachate in the harmless treatment phosphogypsum filling in the repair mine in the rainy season increased significantly by about 25m 3 / day or so, the effective collection and drainage system for the leachate of the mine ecological restoration filling body is used to collect and drain the leachate in the phosphogypsum filling body for harmless treatment in the repair mine pit, which has obvious effects, and with the increase of the filling thickness in the later stage, the leachate collected and drained every day has a downward trend, and the effective collection and drainage system for the leachate of the mine ecological restoration filling body automatically collects and drains the leachate in the phosphogypsum filling body for harmless treatment according to the leachate water level in the leachate collection well 1 without manual intervention.

[0055] The above description does not limit the present invention in any form. Although the present invention has been disclosed through the above embodiments, it is not intended to limit the present invention. Any technician familiar with the profession can use the technical content disclosed above to make some changes or modifications to equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A mine ecological restoration filling body leachate effective collection and drainage system, characterized by: include: A leachate collection well (1), wherein the leachate collection well (1) is arranged in a mine; A main drainage blind ditch (2), the main drainage blind ditch (2) being in communication with the leachate collection well (1); A branch drain blind ditch (3), the branch drain blind ditch (3) being in communication with the main drain blind ditch (2); a leachate pump (8), the leachate pump (8) being arranged at the bottom of the leachate collection well (1); a leachate collection tank (12), wherein the leachate collection tank (12) is connected to the output end of the leachate pump (8) via a drainage pipe (11); The branch drainage blind ditch (3) is sloping toward the main drainage blind ditch (2) at a bottom slope of ≥%2 and is connected thereto, and the main drainage blind ditch (2) is also sloping toward the leachate collection well (1) at a bottom slope of ≥%2 and is connected thereto; The main drainage blind ditch (2) comprises a HDPE perforated pipe I (16), a geotextile I (15), a permeable gravel layer I (14), and a geotextile II (13) which are arranged from the inside to the outside; The branch drainage blind ditch (3) comprises a HDPE perforated pipe II (20), a geotextile III (19), a permeable gravel layer II (18), and a geotextile IV (17) which are arranged from the inside to the outside.

2. The effective collection and drainage system for leachate of a mine ecological restoration filling body according to claim 1 is characterized in that: An anti-seepage layer is laid under the main drainage blind ditch (2) and the branch drainage blind ditch (3).

3. The effective collection and drainage system for leachate of a mine ecological restoration filling body according to claim 1 is characterized in that: The HDPE perforated pipe I (16) is a PE80 water pipe with plum blossom-shaped openings at a spacing of 200 mm.

4. The effective collection and drainage system for mine ecological restoration filling body leachate according to claim 1 is characterized in that: The HDPE perforated pipe II (20) is a PE80 water pipe with plum blossom-shaped openings with a spacing of 100 mm.

5. The effective collection and drainage system for mine ecological restoration filling body leachate according to claim 1 is characterized in that: The drainage system further comprises a solar photovoltaic power generation panel (4), an automatic control switch (5), an automatic control switch wire (6), a water pump wire (7), a sensor wire (9), and a water level sensor (10); the automatic control switch (5) is electrically connected to the solar photovoltaic power generation panel (4), the leachate water pump (8), and the water level sensor (10) via the automatic control switch wire (6), the water pump wire (7), and the sensor wire (9); and the water level sensor (10) is arranged on the inner wall of the leachate collection well (1).

6. The effective collection and drainage system for leachate of a mine ecological restoration filling body according to claim 1 is characterized in that: The leachate pump (8) is a small deep water pump.

Images