CN111042153A

CN111042153A - Capacity expansion method for anti-seepage wet-discharge tailing pond

Info

Publication number: CN111042153A
Application number: CN201911351990.2A
Authority: CN
Inventors: 刘瀚和; 金志斌; 卢建京; 袁永强
Original assignee: China Nerin Engineering Co Ltd
Current assignee: China Nerin Engineering Co Ltd
Priority date: 2019-12-25
Filing date: 2019-12-25
Publication date: 2020-04-21

Abstract

The invention discloses an anti-seepage type wet-discharge tailing pond expansion method, which utilizes a dam body and a horizontal anti-seepage system of the existing tailing pond, utilizes a newly-built clear water pond or a clear water pond in an adjacent newly-built tailing pond as a reservoir for reverse stacking and drainage flood drainage during the increase of the capacity of the tailing pond from the end stage under the premise of not increasing the land, realizes stacking and damming by ore drawing under the conditions of increasing an overflow channel, a drainage open channel and the clear water pond, can greatly increase the storage capacity, particularly obtains huge storage capacity in the expansion of a large-area tailing pond, prolongs the service life of the tailing pond for a mine, saves the storage capacity and investment of the newly-built tailing pond, creates huge profits for mine enterprises, and can save the land.

Description

Capacity expansion method for anti-seepage wet-discharge tailing pond

Technical Field

The invention relates to the field of non-coal mines, in particular to the field of capacity expansion of mine tailing ponds, and specifically relates to a capacity expansion method of an anti-seepage type wet-discharge tailing pond for the field of non-coal mines.

Background

The tailing pond is a place which is formed by building a dam to intercept a valley opening or enclosing the ground and is used for piling metal or nonmetal mines and discharging tailings or other industrial waste residues after ore sorting. With the recent environmental protection emphasis of the nation, the implementation of the general industrial solid waste storage and disposal site pollution control standard, which is issued by the regulation of the national solid waste pollution environmental prevention law of the people's republic of China, has prompted the need for full-reservoir level seepage prevention of many tailings meeting the II-class standard during stockpiling. Generally, the tailings pond adopts one-step dam construction, and is subjected to wet discharge through a conveying pipeline to the pond for stacking, and the tailings pond of the type is called as an anti-seepage wet discharge tailings pond.

The seepage-proofing wet-discharge tailing pond is not discharged into tailings only by using dam crest elevation. In order to maintain continuous production, mine enterprises generally adopt a new seepage-proofing tailings pond close to an established tailings pond, especially in a relatively flat zone. However, a newly-built tailing pond needs large-area land acquisition, large investment and long construction period. If the established tailings pond can be fully utilized for expansion, or one less tailings pond can be built. Or after the second tailing pond is newly built, if the two tailing ponds are fully utilized to form linkage, the storage capacities of the two tailings ponds are greatly increased, and benefits are created for enterprises.

Disclosure of Invention

In order to solve the technical problems, the invention aims to provide a method for expanding the capacity of an anti-seepage type wet tailing pond which is served to the final stage, wherein a newly-added clarified water tank is used as a reservoir which is served to the final tailing pond, so that the capacity of the anti-seepage type wet tailing pond can be expanded in a reverse pile mode by wearing a hat, and the problem that the capacity of the anti-seepage type wet tailing pond cannot be expanded in the final stage is solved.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a capacity expansion method for an anti-seepage type wet-discharge tailing pond is characterized in that a clarified water pond is arranged in a downstream area around the tailing pond to serve as a water storage pond of the tailings pond after capacity expansion, a water discharge open channel is arranged in the tailing pond to discharge accumulated water in the tailing pond to the clarified water pond, and the anti-seepage range of the tailing pond is within the anti-seepage rangeBoundary ofA tailing accumulation dam is arranged in the line and comprises a accumulation sub-dam, a tailing dumping position, an accumulation sub-dam and a tailing dumping positionPenetration rangeBoundary ofOverflow channels are arranged between lines for discharging tailings and accumulating dams and preventing seepageBoundary ofOverflow or seepage water generated during ore drawing is arranged between the lines, the overflow channel is in an inverted trapezoid shape, one side of the overflow channel is an impermeable side slope in the storage, and the other side of the overflow channel is an outer slope of the stacking sub-dam; and performing wet ore discharge at the top of the stacking sub-dam, wherein the shoal surface in the tailing pond is required to uniformly rise, when the shoal surface in the pond rises to the top of the stacking sub-dam, the stacking sub-dam can be continuously stacked, ore can be discharged circularly until the stacking reaches the final expansion elevation, and a large amount of newly added storage capacity can be obtained.

Furthermore, the clarification water tank is a newly-built clarification water tank or a newly-built tailing pond adjacent to the newly-built clarification water tank is directly used.

Furthermore, the clear water pond needs to be fully horizontal in seepage prevention.

Further, the open drainage channel needs to be horizontally impermeable.

Furthermore, the stacking sub-dam can be built by using rough tailings in a warehouse, can also be built by using local soil stones, and can also be built by using known process modes such as film bag dam building and the like.

Furthermore, the height of the overflow channel is 1-3 m lower than that of the top of the boundary line in the seepage prevention range, and the bottom width is 2-10 m.

The invention has the advantages of

The anti-seepage tailing pond capacity expansion method provided by the invention creatively provides a method for utilizing a newly-built clarified water tank or a clarified water tank in an adjacent newly-built tailing pond as a reservoir for draining water and discharging flood when the tailing pond which is served to the final stage is reversely piled and expanded, so that the problem that the anti-seepage tailing pond cannot be effectively expanded in the final stage is solved. According to the method, the dam body and the horizontal seepage-proofing system of the existing tailing pond are utilized, only the overflow channel and the drainage open channel are added on the premise of basically not increasing the land, and the accumulation and damming are realized through ore drawing under the condition of clearing the water pond, so that the storage capacity can be greatly increased, especially huge storage capacity can be obtained in the expansion of a large-area tailing pond, the service life of the tailing pond for mines is prolonged, the storage capacity and the investment of a newly-built tailing pond are saved, huge benefits are created for mine enterprises, and the land can be saved.

Drawings

Fig. 1 is a schematic cross-sectional view of an impermeable tailings pond expansion method according to an embodiment of the present invention after expansion;

fig. 2 is a schematic plan view of an impermeable tailings pond expansion method according to an embodiment of the present invention after expansion;

the names corresponding to the reference numbers in the figures are: 1-tailing dam, 2-tailing pond served to the final stage, 3-seepage-proofing range boundary line, 4-overflow channel, 5-newly-added storage capacity, 6-tailing accumulation dam, 7-clear water pond and 8-drainage open channel.

Detailed Description

In order to more clearly illustrate the technical solution of the present invention, the drawings used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it should be obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

The following is a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements are also considered to be within the scope of the present invention.

1. Firstly, a clear water pond 7 is newly built in a downstream area of a tailing dam 1 of a tailing pond 2 which is served to the final stage; the clear water tank needs to be horizontally impermeable; the clarification tank can also be a clarification tank in an adjacent newly-built tailing pond.

2. Arranging a drainage open channel 8 in the tailing pond 2 which is served to the final stage; the drainage open channel needs horizontal seepage prevention; the drainage open channel can meet the requirement of draining accumulated water in the tailing pond served to the final stage to a newly-built downstream clarification tank.

3. Arranging a tailing stacking dam 6 within a boundary line 3 of an impermeable range of a tailing pond 2 from service to the final stage; the tailing stacking dam 6 comprises a stacking sub dam and a tailing dumping and drawing position; the stacking sub-dam can be built by adopting the rough tail in a warehouse, can also be built by adopting local soil stones, can also be built by adopting known process modes such as film bag dam building and the like;

4. arranging an overflow channel 4 between the stacking sub-dam and the boundary line of the seepage-proofing range; the overflow channel 4 is generally in an inverted trapezoid shape, one side of the overflow channel is an in-reservoir seepage-proofing side slope, and the other side of the overflow channel is an outer slope of the stacking sub-dam; the overflow channel 4 is lower than the top elevation of the boundary line in the seepage-proofing range by about 1-3 m, and the bottom width is 2-10 m.

5. And carrying out wet ore discharge at the top of the stacking sub-dam, and requiring the beach surface in the storage to rise uniformly.

6. When the beach surface in the warehouse rises to the top of the sub-dam, the ore drawing sub-dam can be continuously piled up, ore drawing is circulated until the ore is piled up to the final expansion elevation, and a large amount of newly added storage capacity 5 with caps can be obtained.

Example (b):

the final effective storage capacity of the original design of a certain tailing pond is about 6400 multiplied by 10⁴m³The top area of the tailing pond is about 270 multiplied by 10⁴m³The tailings wet discharging and stacking damming scheme is implemented, the height is increased by about 15m, and the new storage capacity is directly obtained on the original storage by about 2800 multiplied by 10⁴m³And great benefits are created for enterprises.

Claims

1. A capacity expansion method for an anti-seepage type wet-discharge tailing pond is characterized in that a clarified water pond is arranged in a downstream area around the tailing pond to serve as a reservoir of the tailings pond after capacity expansion, a water discharge open channel is arranged in the tailing pond to discharge accumulated water in the tailing pond into the clarified water pond, a tailing accumulation dam is arranged within an anti-seepage range boundary line of the tailing pond and comprises a accumulation sub-dam and a tailing flushing and discharging position, an overflow channel is arranged between the accumulation sub-dam and the anti-seepage range boundary line and used for discharging overflow or seepage water generated during ore discharging between the tailing accumulation dam and the anti-seepage range boundary line, the overflow channel is in an inverted trapezoid shape, one side of the overflow channel is an anti-seepage side slope in the tailing pond, and the other side of the overflow channel is an outer slope of the accumulation sub; and performing wet ore discharge at the top of the stacking sub-dam, wherein the shoal surface in the tailing pond is required to uniformly rise, when the shoal surface in the pond rises to the top of the stacking sub-dam, the stacking sub-dam can be continuously stacked, ore can be discharged circularly until the stacking reaches the final expansion elevation, and a large amount of newly added storage capacity can be obtained.

2. The method for expanding the capacity of the impermeable wet-drainage tailing pond according to claim 1, wherein the clarified water pond is a newly-built clarified water pond or a newly-built tailing pond adjacent to the newly-built clarified water pond is directly used.

3. An anti-seepage type wet-discharge tailing pond capacity expansion method according to claim 1 or 2, characterized in that the clarified water pond needs to be subjected to full-horizontal anti-seepage.

4. The method for expanding the capacity of the impermeable wet-discharge tailing pond according to claim 1, wherein the drainage open channel needs horizontal impermeable.

5. The method for expanding the capacity of the anti-seepage type wet-discharge tailing pond according to claim 1, wherein the stacking sub-dam can be built by using rough tailings in the pond, local soil stones or a membrane bag dam building process.

6. The method for expanding the capacity of the impermeable wet-discharge tailing pond according to claim 1, wherein the height of the overflow channel is about 1-3 m lower than the top height of the impermeable boundary line, and the bottom width is 2-10 m.