CN-121976850-A - Method for stoping fine-particle-grade tailings in tailing pond

CN121976850ACN 121976850 ACN121976850 ACN 121976850ACN-121976850-A

Abstract

The invention discloses a tailing pond fine-particle-grade tailing extraction method, and belongs to the technical field of tailing pond tailing extraction. Dividing the surface of a tailing pond into three stoping areas according to stoping modes, dry beach bearing capacity and equipment operation requirements, carrying out dry stoping on tailings in a region II to form a tailings pit, building a enclosing bank around the tailings pit, then reforming the enclosing bank into a sedimentation tank, conveying fine-grain-grade tailings in the region III into the sedimentation tank by adopting a slurry pump, carrying out dry stoping on the tailings after completion of airing, and conveying the tailings out of the pond after sedimentation, drainage and airing. The invention is mainly used for the stoping operation of the fine-grain-grade tailings in the tailing pond, can convert wet mining operation into dry mining operation, shortens the airing time of the tailings, and improves the safety and the propelling efficiency of the stoping operation.

Inventors

YU ZHIRONG
LAI GUOWANG
Weng Songhua
WU HUANXUN
DING JIE
CHEN QIANZHONG
XU YANFEI

Assignees

广东广业云硫矿业有限公司

Dates

Publication Date: 20260505
Application Date: 20260310

Claims (9)

1. The method for extracting the fine-grain-grade tailings in the tailing pond is characterized by comprising the following steps of: according to the dry beach bearing capacity and the stoping mode of the tailing pond, stoping areas are carried out on the pond surface of the tailing pond, and an area I, an area II and an area III are divided; Dry stoping is carried out on the tailings in the zone II, and a tailings pit is formed on a sediment beach in the zone II; constructing a cofferdam around the tail sand pit, and modifying the tail sand pit into a sedimentation tank; Conveying the fine-particle-grade tailings in the area III into the sedimentation tank by adopting a slurry pump; precipitating, draining and airing the fine-particle-grade tailings in the sedimentation tank; and carrying out dry extraction on the fine-grain-grade tailings which are dried in the sedimentation tank, and transporting the extracted fine-grain-grade tailings out of a tailing pond.
2. The method for extracting fine-fraction tailings from a tailings pond according to claim 1, wherein in the step of extracting the pond surface of the tailings pond, the dry beach range corresponding to the minimum dry beach length is divided into a zone I, the range from the minimum dry beach length to the water edge of the drainage area is divided into a zone II, and the drainage area is divided into a zone III based on the beach top of the tailings pond.
3. The method for extracting fine-grain tailings in a tailings pond according to claim 1, wherein in the step of carrying out dry extraction on the tailings in the zone II, extraction is carried out sequentially in the order of longitudinal zoning or transverse zoning, the tailings are piled up and scooped by an excavator, and the scooped tailings are transported to the outside of the tailings pond through a transport vehicle.
4. The method according to claim 1, wherein in the step of reforming the tailings pit into a sedimentation tank, an excavator working platform is reserved between adjacent sedimentation tanks, and the excavator working platform extends along the length direction of the sedimentation tank.
5. The method for recovering fine-fraction tailings in a tailings pond according to claim 1, wherein in the step of conveying the fine-fraction tailings in the III region into the sedimentation tank by using a slurry pump, an output end of the slurry pump is connected with the sedimentation tank by a pipeline, and the slurry pump pumps fine-fraction tailings in the III region and conveys the fine-fraction tailings into the sedimentation tank by the pipeline.
6. The method for recovering fine-grain tailings in a tailings pond according to claim 1, wherein in the steps of precipitating, draining and airing fine-grain tailings in the sedimentation tank, drainage is performed among a plurality of sedimentation tanks in an overflow mode, so that fine-grain ore pulp in the sedimentation tank is clarified, and clarified water is discharged.
7. The method according to claim 4, wherein in the step of dry extraction of the fine-grain-grade tailings in the sedimentation tank after the completion of the air-drying, an excavator is used to excavate and load the fine-grain-grade tailings in the sedimentation tank on an excavator work platform.
8. The method according to claim 7, wherein in the step of transporting the recovered fine fraction tailings to the outside of the tailings pond, the extracted fine fraction tailings are loaded by a transport vehicle, and the fine fraction tailings are transported to the outside of the tailings pond via a transport road in the tailings pond.
9. The method for extracting fine-fraction tailings in a tailings pond according to claim 1, wherein the tailings in the area I are extracted by adopting a dry extraction mode, and the extraction operation in the area I is performed synchronously with the conveying operation of the fine-fraction tailings in the area III.

Description

Method for stoping fine-particle-grade tailings in tailing pond Technical Field The invention relates to the technical field of tailing reservoir tailing recovery. Background In the field of tailing extraction engineering of tailing reservoirs, the main extraction modes at present are divided into dry extraction, wet extraction and dry-wet combined extraction. The dry stoping is suitable for a tailing pond with small catchment area, no water in the pond, and low requirements on continuous operation, and the method has the advantages of low technical requirements, high operation efficiency and strong stoping safety, but the operation process is greatly affected by climate, and water interception ditches and temporary transportation roads need to be built along the periphery of the tailing pond before implementation. Wet stoping is suitable for tailing ponds with large mineral dressing water demand or one-time dam building, the operation process is less influenced by climate, but a pipeline conveying system is required to be erected before implementation, the early investment cost is high, the technical requirement is high, the filtering efficiency is low in the operation process, and the safety of stoping operation is obviously influenced by water level in the pond. The dry-wet combined stoping is suitable for a tailing pond with large storage capacity, large catchment area, accumulated water in the tailing pond and high requirements on continuous operation, the stoping mode can be flexibly and flexibly adjusted in the production process, and the technical requirements are moderate, the operation efficiency is high, and the stoping safety is high. According to the sediment rule of tailings in a tailing pond, the tailings particles in a dry beach area in front of the tailing pond are thicker, the mechanical property is better, the bearing capacity is higher, and the tailing pond is a main operation area of dry recovery. The tailing in the tail water outlet area of the warehouse is in a non-water state, and the problems of high water content and low bearing capacity still exist after long-time airing, so that the operation condition of dry recovery cannot be met. Meanwhile, the area is a concentrated area of the fine-grain-grade tailings, the fine-grain-grade tailings are high in self-filtering difficulty, and the application of wet recovery is limited by combining the safety management requirement of the current tailings pond. In the whole stoping operation process of the tailing pond, the stoping treatment effect of the fine-grain-grade tailings can directly influence the advancing progress of the whole stoping operation, but the existing stoping mode cannot adapt to the operation characteristics of the tailings, and the efficient and safe stoping of the tailings in the area is difficult to realize. Disclosure of Invention The invention aims to provide a tailing pond micro-particle grade tailing extraction method, which is used for solving the problems that the tailing pond micro-particle grade tailing in the tailing pond tail water outlet area cannot be matched with a conventional dry extraction or wet extraction mode, the extraction operation efficiency is low and the safety guarantee is insufficient. In order to achieve the above purpose, the present invention provides the following technical solutions: A tailing extraction method of fine-particle-grade tailings in a tailing pond comprises the following steps: according to the dry beach bearing capacity and the stoping mode of the tailing pond, stoping areas are carried out on the pond surface of the tailing pond, and an area I, an area II and an area III are divided; Dry stoping is carried out on the tailings in the zone II, and a tailings pit is formed on a sediment beach in the zone II; constructing a cofferdam around the tail sand pit, and modifying the tail sand pit into a sedimentation tank; Conveying the fine-particle-grade tailings in the area III into the sedimentation tank by adopting a slurry pump; precipitating, draining and airing the fine-particle-grade tailings in the sedimentation tank; and carrying out dry extraction on the fine-grain-grade tailings which are dried in the sedimentation tank, and transporting the extracted fine-grain-grade tailings out of a tailing pond. In one possible implementation manner, in the step of carrying out stoping and zoning on the face of the tailing pond, the beach top of the tailing pond is taken as a reference, the dry beach range corresponding to the minimum dry beach length is divided into a zone I, the range from the minimum dry beach length to the water edge of the drainage area is divided into a zone II, and the drainage area is divided into a zone III. In one possible implementation manner, in the step of dry extraction of the tailings in the zone II, extraction is sequentially performed according to the sequence of longitudinal zonal division or transverse zonal division, the tailings are piled and