CN211571683U - Tailing dam drainage system - Google Patents
Tailing dam drainage system Download PDFInfo
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- CN211571683U CN211571683U CN201922307643.1U CN201922307643U CN211571683U CN 211571683 U CN211571683 U CN 211571683U CN 201922307643 U CN201922307643 U CN 201922307643U CN 211571683 U CN211571683 U CN 211571683U
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Abstract
The utility model discloses a tailing dam drainage system, include: two layers of geotechnical mats are stacked up and down in sequence, and each layer of geotechnical mat is coated with a layer of geotechnical cloth; the vacuum seepage drainage pipe is laid between the two layers of geotechnical mats and is provided with a plurality of drain holes; the vacuum seepage drainage pipe is connected with a vacuum pump; one upper coarse-end sand layer is laid above the geotextile coated by the upper geotechnical mat in the two geotechnical mats; and a lower coarse-end sand layer is laid below the geotextile coated by the lower geotechnical mat in the two geotechnical mats. The vacuum drainage and seepage pipe is clamped in the middle of the geotechnical mat, and the coarse tailing sand layers are respectively paved outside the geotechnical cloth, so that physical silting of fine particles in tailings to a drainage facility and calcified chemical silting around the drainage and seepage pipe can be prevented, negative pressure of vacuum suction is combined with positive pressure drainage, the drainage influence radius can be increased, the hydraulic gradient of a drainage and seepage path is improved, the drainage of fine-grained tailings is accelerated, the drainage and seepage efficiency is improved, and the safety and stability of a dam body are facilitated.
Description
Technical Field
The utility model relates to a tailing field of handling especially relates to a tailing dam drainage system.
Background
When mines are mined for a certain period of time, more and more fine tailings enter a tailing pond and widely exist in mines such as copper ores, gold ores, lead-zinc ores, alumina ores, phosphate ores and the like. The problem of water seepage and discharge of a dam body for fine tailings storage is one of the problems encountered in the tailings treatment technology, and the problem of influence on the safety and stability of the dam body due to the fact that the seepage and discharge of the tailing dam for fine tailings or ultrafine tailings storage are difficult to cause that the seepage line of the dam body is higher often is a problem faced by many mine enterprises.
To remove seepage water from fine tailings dams, various techniques are currently introduced into the precipitation of tailings dams, and these techniques are generally divided into three categories: horizontal drainage and vertical drainage and horizontal and vertical combined drainage and seepage. Among them, horizontal drainage is the most commonly used, and this method generally adopts the material with a large permeability coefficient to lay in the area in front of the dam, so that the seepage water in the fine tailings is collected along the horizontal drainage layer with a large permeability coefficient, and is drained to a designated place through the arranged drainage pipe. The horizontal drainage is a more common tailing dam drainage technology due to the large coverage area of the dam surface, the used materials are mainly divided into two types, one type is coarse particle materials such as stope waste rocks and broken stones, and the application has the problems of higher price and difficult construction when the granularity of tailings is too fine; the other is a geosynthetic material, which comprises novel geosynthetic materials such as a geotechnical mat, a composite geotechnical grid, a plastic drainage blind ditch and the like. Most of the geotechnical materials have the problems that when the granularity of tailings is too fine, the drainage effect is limited, the drainage time is long, and the expected drainage effect is difficult to achieve. And the influence radius of the drainage body is smaller, the thickness of the drainage layer which can be covered by the fine tailings, especially the superfine tailings, is limited, the distance between horizontal drainage materials of different layers is often required to be reduced to increase the engineering investment, and even then, the better consolidation degree can not be achieved within the limited sub-dam construction time. Such an under-consolidated condition would be detrimental to the safety stability of the dam and affect the stacking of the upper dam. In addition, clogging problems caused by fine tailings often cause horizontal drainage facilities to function only at the initial stage of installation and to fail later due to physical and chemical clogging. For example, the chinese patent application CN 201410684171.0 discloses a method for pre-dam drainage when a sub-dam is constructed in a red mud disposal site, which is to install a composite geotechnical drainage net on the inner slope of the sub-dam, install a sandstone drainage layer at the bottom of the inner slope dam, reinforce the foundation at the bottom of the sandstone drainage layer with soil and stone, install an in-site drainage pipe at the bottom of the sandstone drainage layer, allow the red mud seepage water in the area in front of the dam to enter the in-site drainage pipe through the composite geotechnical drainage net and the sandstone drainage layer, allow the seepage water to automatically flow to a drainage ditch at the bottom of the sub-dam outer slope dam through the in-site drainage pipe, allow the drainage ditch to connect the seepage water to the disposal site drainage pipe, and finally drain the seepage water to. The red mud seepage water in the area in front of the sub-dam can be discharged as soon as possible, so that the drying speed of the red mud in the area in front of the dam is accelerated, and the safety of a dam body is facilitated. This solution has at least the following drawbacks: (1) when the red mud is fine in granularity and applied to a fine-grained tailing dam, the problems of soft beach surface and difficulty in construction exist, and particularly when the red mud or the tailing is fine in granularity, the sedimentation amount of the throwing and filling stone is too large, so that the construction condition of the vibrating road roller on the beach surface is difficult to realize; (2) when the granularity of the red mud or the tailings is fine, the drainage and seepage effect is limited, the drainage and seepage time is long, and the expected drainage and seepage effect is difficult to achieve; (3) the influence radius of the seepage drainage body is small, and the thickness of the seepage drainage layer which can be covered by the fine tailings, particularly the superfine tailings, is limited. Another chinese patent application CN201810048436.6 also discloses a drainage and seepage system for reducing the seepage line of a dam body of a tailing pond by using mining waste rock and a construction method thereof, which is a drainage and seepage system capable of automatically flowing formed by combining a transverse drainage and seepage blind ditch and a longitudinal drainage and seepage pipeline by using waste rock without economic value originally. The mining waste rock has good permeability, can improve the seepage speed of seepage water in the tailing dam, improve the anti-liquefaction capacity of the tailing dam, and reduce the liquefaction area of the dam body, and has the advantages of low cost, simple and convenient construction, convenient popularization and extremely high commercial value; meanwhile, by limiting specification parameters and arrangement modes of the waste stone columns, drainage and consolidation of the tailing sand can be accelerated, and stability of a tailing pond can be improved. However, this solution has at least the following disadvantages: the waste stone columns can only be pre-buried, and certain bearing capacity requirements are met for a construction foundation. The implementation of the fine tailing dam, especially the tailing dam with the beach surface not meeting the bearing capacity requirement has certain difficulty, and the drainage and seepage effect can be only achieved on the dam body with the waste rock columns, so that the drainage and consolidation of the soft beach surface can not be realized.
In conclusion, in the existing solution for solving the safety and stability of the dam body by drainage, the drainage surface is not convenient to solidify due to the soft beach surface of the sedimentary beach surface, so that the existing drainage and drainage facilities are not convenient to construct, the drainage and drainage effects of the sedimentary soft beach surface are not good, and the safety and stability problem of the fine tailings dam with the sedimentary soft beach surface cannot be solved by effective drainage and drainage.
SUMMERY OF THE UTILITY MODEL
Based on the problem that prior art exists, the utility model aims at providing a tailing dam drainage and seepage system can solve the drainage and seepage scheme that current processing dam body infiltration line is higher than normal, to the construction of being not convenient for that soft beach face exists and the row's of consolidation surface of water, leads to the drainage to ooze the effect limited, can't solve the problem of guaranteeing the dam body security through the drainage and seepage.
The utility model aims at realizing through the following technical scheme:
the utility model provides an embodiment provides a tailing dam drainage system, include:
two layers of geotechnical mats, two layers of geotechnical cloth, a vacuum drainage pipe, a vacuum pump, an upper coarse tailing layer and a lower coarse tailing layer; wherein the content of the first and second substances,
the two layers of geotechnical mats are stacked up and down in sequence, and a layer of geotechnical cloth is coated outside each layer of geotechnical mat;
the vacuum seepage drainage pipe is laid between the two layers of geotechnical mats and is provided with a plurality of drainage holes;
the vacuum seepage drainage pipe is connected with the vacuum pump;
an upper coarse-end sand layer is laid above the geotextile coated by the upper geotechnical mat in the two geotechnical mats;
and a lower coarse-end sand layer is laid below the geotextile coated by the lower geotechnical mat in the two geotechnical mats.
By the foregoing the utility model provides a technical scheme can see out, the embodiment of the utility model provides a tailing dam drainage and seepage system, its beneficial effect is:
the vacuum infiltration discharge pipe is clamped in the middle of the geotechnical mat, the geotechnical cloth is coated outside the geotechnical mat, the coarse tailing layers are respectively paved outside the geotechnical cloth, and the vacuum pump is adopted for vacuum pumping, so that the vacuum infiltration discharge pipe can perform infiltration discharge under the combined action of negative pressure and positive pressure of upper load, the infiltration slope of an infiltration path is greatly increased, the infiltration discharge efficiency is improved, and the consolidation speed of a weak fine-grained tailing sedimentation beach is accelerated; and the geotextile coated with the geotextile mat and the upper and lower coarse tailings sand layers arranged outside the geotextile mat and the geotextile mat respectively perform reverse filtration, so that the running and mixing phenomenon and the clogging of fine particles of tailings on the geotextile seepage drainage material are prevented; the drainage and seepage system is convenient to construct, efficient and low in cost, can be used for rapidly draining seepage water in front of a stacking dam particularly for damming fine tailings with poor drainage and seepage, improves the consolidation speed of the tailing stacking dam, improves the damming efficiency of the fine tailings, is favorable for the safety and stability of a dam body, and can be widely used for drainage and seepage of the stacking dam body of the tailing dam.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the description below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic plan view of a drainage system of a tailing dam according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken at A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken at B-B of FIG. 1;
the parts corresponding to the reference numerals in the figures are: 1-depositing beach surface; 2-a drainage system; 21-coarse tailings sand layer; 22-geotextile of the lower layer; 23-lower geotechnical mat; 24-vacuum infiltration discharge pipe; 241-a drain hole; 25-upper geotechnical mat; 26-upper geotextile; and 27-applying a coarse tailings sand layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the specific contents of the present invention, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiment of the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Details not described in the embodiments of the present invention belong to the prior art known to those skilled in the art.
As shown in fig. 1 to 3, the embodiment of the utility model provides a tailing dam drainage system, include:
two layers of geotechnical mats, two layers of geotechnical cloth, a vacuum drainage pipe, a vacuum pump, an upper coarse tailing layer and a lower coarse tailing layer; wherein the content of the first and second substances,
the two layers of geotechnical mats are stacked up and down in sequence, and a layer of geotechnical cloth is coated outside each layer of geotechnical mat;
the vacuum seepage drainage pipe is laid between the two layers of geotechnical mats and is provided with a plurality of drainage holes;
the vacuum seepage drainage pipe is connected with the vacuum pump;
an upper coarse-end sand layer is laid above the geotextile coated by the upper geotechnical mat in the two geotechnical mats;
and a lower coarse-end sand layer is laid below the geotextile coated by the lower geotechnical mat in the two geotechnical mats.
Preferably, in the drainage system, the vacuum drainage pipe is arranged in the middle between the two layers of geotechnical mats, so that the drainage holes in the vacuum drainage pipe are all covered by the two layers of geotechnical mats, and the blockage of the drainage holes can be effectively avoided. The upper and lower geotechnical mats are wrapped by the upper and lower geotechnical cloths, and an outlet is reserved at the vacuum seepage drainage pipe outside the tailing dam (see figure 2).
In the drainage and seepage system, the vacuum drainage and seepage pipe is provided with a plurality of drainage holes:
the drainage holes arranged on the vacuum drainage and seepage pipe are all positioned at one side in the tailing dam, and the drainage holes are not formed in the vacuum drainage and seepage pipe within the range of more than 50m at the outlet of the tailing dam;
the end of the vacuum infiltration discharging pipe, which is not provided with the water discharging hole, is connected with the vacuum pump. The mode that the vacuum seepage drainage pipe is close to the water outlet without a water outlet can avoid air leakage during vacuum suction.
In the drainage and seepage system, a plurality of drainage holes are uniformly distributed on the vacuum drainage and seepage pipe in a staggered manner. Thus ensuring multi-directional water absorption and achieving better drainage and seepage effects.
In the drainage and seepage system, the thickness of the coarse-end sand layer laid above the geotextile is 30-50 cm. The mode can form a coarse tailings reversed filter layer above the geotextile, can solve the problem that fine particles of tailings block the geotextile, and cannot cause failure of row permeable layers due to physical blocking.
The above-mentioned drainage system still includes: and a lower coarse-end sand layer is laid below the geotextile coated by the lower geotechnical mat in the two geotechnical mat layers. Preferably, the thickness of the lower coarse tailings sand layer is 30-50 cm, and the corresponding thickness can be set according to needs. The arrangement of the second coarse tailings layer can form a harder construction surface on the deposition beach surface when the deposition beach surface is softer and the lower geotechnical mat cannot be laid, so that the lower geotechnical mat can be conveniently laid, and a reverse filter layer can be added to the lower geotechnical mat.
The vacuum seepage drainage pipe is clamped in the middle of the geotechnical mat, the geotechnical cloth is coated outside the geotechnical mat, and the upper and lower coarse tailing layers are paved outside the geotechnical mat respectively, so that physical silting of a seepage drainage facility and calcification chemical silting around the seepage drainage pipe by fine particles in tailings can be prevented, and negative pressure of vacuum suction is combined with positive pressure seepage drainage, so that the radius of influence of seepage can be increased, the hydraulic gradient of a seepage drainage path is improved, seepage drainage of fine tailings is accelerated, seepage drainage efficiency is improved, and the safety and stability of a dam body are facilitated.
The drainage and seepage system of the utility model adopts the coarse sand layer to carry out reverse filtration outside the geotextile, thereby preventing fine particles of tailings from silting up the drainage and seepage material of the geotextile; the vacuum pump is adopted for vacuum pumping, so that the vacuum seepage drainage pipe can perform seepage drainage under the combined action of negative pressure and positive pressure of upper load, the seepage slope of a seepage path is greatly increased, the seepage drainage efficiency is improved, and the consolidation speed of the weak settling beach of the fine tailings is accelerated; the drainage and seepage system is convenient to construct, efficient and low in cost, can be used for rapidly draining seepage water in front of a stacking dam particularly for damming fine tailings with poor drainage and seepage, improves the consolidation speed of the tailing stacking dam, improves the damming efficiency of the fine tailings, is favorable for the safety and stability of a dam body, and can be widely used for drainage and seepage of the stacking dam body of the tailing dam.
The embodiments of the present invention will be described in further detail below.
The embodiment of the utility model provides a tailing dam drainage and seepage system can realize that the quick drainage and seepage of the weak beach face of tailing dam is oozed, and this drainage and seepage system adopts and places the vacuum drainage and seepage pipe in the two-layer geotechnological mat, and geotechnological mat wraps geotechnological cloth outward, and geotechnological cloth is laid thick tailings outward and is carried out the reverse filtration. The vacuum seepage drainage pipe is provided with a hole at one side in the tailing dam, the hole is not formed in the range larger than 50m at the outlet of the tailing dam to prevent air leakage, the outlet at one end of the vacuum seepage drainage pipe is connected with a vacuum pump, when the seepage drainage system runs, the vacuum pump vacuumizes the vacuum seepage drainage pipe to form negative pressure, water in six directions of the geotechnical mat is collected into the vacuum seepage drainage pipe along the seepage gradient direction, and the water is discharged out of the dam body from the outlet at one end of the vacuum seepage drainage pipe to be collected. When the tailings are fine tailings and the tailings sedimentation beach is soft and cannot meet the construction condition for laying the geotechnical mat, coarse sand can be thrown in a laying area in advance to form a second coarse tailing sand layer, and the geotechnical mat laying of the lower layer is carried out after the laying condition is met, so that the problem that the sedimentation beach of the fine tailing dam is soft and cannot meet the construction requirement can be solved;
specifically, the drainage system of the tailing dam is shown in fig. 1 to 3, and comprises: two layers of geotechnical mats, a vacuum seepage drainage pipe, two layers of geotechnical cloth, a coarse tailing sand layer and a vacuum pump; wherein, each part has the following functions:
geotechnical matting: the upper layer and the lower layer are laid in the axial direction of the inner dam in a certain area on the sediment beach of the tailing dam away from the bottom of the initial dam or the accumulation dam, the two sides of the dam are laid towards the middle of the dam in the laying process, and the middle part is disconnected, so that the condition that the middle part of the dam generates large deformation due to overlarge sedimentation to pull and break the geotechnical mat is prevented;
vacuum seepage drainage pipe: vacuum seepage drainage pipes are respectively laid between the upper and lower geotechnical mat layers at the two sides of the dam. Plum blossom-shaped small holes are distributed on the whole pipe body from the water inlet to the position which is more than 50m away from the water outlet, and water seeping in the dam body flows into the pipe body through the small holes;
geotextile: the outer sides of the upper geotechnical mat and the lower geotechnical mat are wrapped with a layer of geotechnical cloth, so that tailing particles are prevented from entering a vacuum drainage pipe and being mixed;
coarse tailings: coarse tailing sand with the thickness of 30-50 cm is paved above the geotextile to be used as a reverse filtering material, so that the condition that the geotextile is blocked by fine particles of the tailing sand to cause the failure of a drainage system is prevented;
a vacuum pump: connecting the water outlet of the vacuum drainage pipe, and vacuumizing to achieve a negative pressure state in the vacuum drainage pipe, so that the seepage water around the geotechnical mat is collected to the vacuum drainage pipe along a seepage path and is discharged out of the dam body;
after the tailing dam is installed, a vacuum pump is operated, seepage water in tailings is gradually collected to the geotechnical mat under the combined action of negative pressure and positive pressure after dam stacking, and is injected into the vacuum seepage drainage pipe through the plum blossom-shaped small holes of the vacuum seepage drainage pipe and then is drained to the outside of the tailing dam through the seepage drainage pipe to be collected uniformly.
The utility model discloses a row oozes system has following beneficial effect at least:
(1) the rapid drainage consolidation of the tailing dam, especially the weak beach face of the fine tailing dam can be realized, the seepage line of the dam body is reduced, the bearing capacity of the foundation of the tailing accumulation dam is improved, the safety and the stability of the dam body are facilitated, and the rapid drainage consolidation has good safety benefit and social benefit.
(2) Physical silting of the tailing fine particles on a drainage system can be prevented, such as coarse sand reverse filtration to avoid physical silting of drainage material geotextile;
(3) negative pressure drainage is utilized, no air enters the drainage system, and chemical clogging caused by calcification at the periphery of the vacuum drainage pipe can be prevented;
(4) the area of the geotechnical mat can be adjusted according to engineering requirements, the seepage-receiving area is large, negative pressure is combined with upper load positive pressure, the seepage slope is large, the seepage-discharging influence radius is large, and the seepage-discharging effect is better;
(5) large-scale construction machinery is not needed, and the construction is simple and convenient.
The above description is only for the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are all covered by the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. A tailing dam drainage system, comprising:
two layers of geotechnical mats, two layers of geotechnical cloth, a vacuum drainage pipe, a vacuum pump, an upper coarse tailing layer and a lower coarse tailing layer; wherein the content of the first and second substances,
the two layers of geotechnical mats are stacked up and down in sequence, and a layer of geotechnical cloth is coated outside each layer of geotechnical mat;
the vacuum seepage drainage pipe is laid between the two layers of geotechnical mats and is provided with a plurality of drainage holes;
the vacuum seepage drainage pipe is connected with the vacuum pump;
an upper coarse-end sand layer is laid above the geotextile coated by the upper geotechnical mat in the two geotechnical mats;
and a lower coarse-end sand layer is laid below the geotextile coated by the lower geotechnical mat in the two geotechnical mats.
2. The tailings dam drainage system of claim 1, wherein the vacuum drainage pipe is provided with a plurality of drainage holes:
the drainage holes arranged on the vacuum drainage and seepage pipe are all positioned at one side in the tailing dam, and the drainage holes are not formed in the vacuum drainage and seepage pipe within the range of more than 50m at the outlet of the tailing dam;
the end of the vacuum infiltration discharging pipe, which is not provided with the water discharging hole, is connected with the vacuum pump.
3. The tailings dam drainage system of claim 2, wherein the plurality of drainage holes are uniformly distributed on the vacuum drainage pipe in a staggered manner.
4. The tailing dam drainage system according to claim 1 or 2, wherein the thickness of the coarse tailing layer laid above the geotextile is 30-50 cm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922307643.1U CN211571683U (en) | 2019-12-19 | 2019-12-19 | Tailing dam drainage system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922307643.1U CN211571683U (en) | 2019-12-19 | 2019-12-19 | Tailing dam drainage system |
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| CN211571683U true CN211571683U (en) | 2020-09-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112922040A (en) * | 2020-12-08 | 2021-06-08 | 矿冶科技集团有限公司 | Reverse filtering layer structure for tailing drainage and seepage and preparation method and installation method thereof |
| RU2798218C1 (en) * | 2022-12-01 | 2023-06-19 | Федеральное государственное бюджетное образовательное учреждение высшего образования Кабардино-Балкарский государственный аграрный университет им. В.М. Кокова (ФГБОУ ВО Кабардино-Балкарский ГАУ) | Tube drainage of combined design |
-
2019
- 2019-12-19 CN CN201922307643.1U patent/CN211571683U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112922040A (en) * | 2020-12-08 | 2021-06-08 | 矿冶科技集团有限公司 | Reverse filtering layer structure for tailing drainage and seepage and preparation method and installation method thereof |
| RU2800513C1 (en) * | 2022-11-03 | 2023-07-21 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Российский государственный аграрный университет - МСХА имени К.А. Тимирязева" (ФГБОУ ВО РГАУ - МСХА имени К.А. Тимирязева) | Method for erecting a tubular drainage of a combined design |
| RU2798218C1 (en) * | 2022-12-01 | 2023-06-19 | Федеральное государственное бюджетное образовательное учреждение высшего образования Кабардино-Балкарский государственный аграрный университет им. В.М. Кокова (ФГБОУ ВО Кабардино-Балкарский ГАУ) | Tube drainage of combined design |
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