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A method for improving in-service tailings pond capacity and a device thereof

A tailings pond and capacity technology, which is applied in the field of mine mining and mine tailings dam construction, can solve the problems of huge construction, transportation costs, increased tailings transportation distance, high investment cost of tailings ponds, etc., and achieves simple and efficient construction technology , increase the storage capacity, and extend the service life

Inactive Publication Date: 2014-07-02
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the scarcity of land resources, tailings ponds occupy a large area, and the investment cost of new tailings ponds is high, and the tailings transportation distance increases, so that enterprises have to bear huge construction and transportation costs, which is not conducive to the development of enterprises

Method used

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  • A method for improving in-service tailings pond capacity and a device thereof
  • A method for improving in-service tailings pond capacity and a device thereof
  • A method for improving in-service tailings pond capacity and a device thereof

Examples

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Effect test

Embodiment 1

[0063] A bauxite tailings pond has reached the designed storage capacity, with a top surface area of ​​100 hectares, a dam height of 30m, a dam bottom width of 75m, a dam crest width of 15m, and a slope of 45. , the daily discharge of tailings pulp is 15,000 m 3 , using the method provided by the invention to increase storage capacity. The specific method is as follows:

[0064] The first step is to analyze the existing tailings pond, and divide the tailings pond into two areas according to the original tailings mud bearing capacity, area Ⅰ and Ⅱ, and area Ⅰ is characterized by large tailings mud particle size, good deposition effect, and good bearing capacity. The area with slightly stronger capacity is about 20 hectares; area II is the area with insufficient carrying capacity and the surface layer is like thin mud, about 80 hectares. Area Ⅰ has a slightly stronger load-bearing capacity. Firstly, a layer of straw woven sheet is properly paved as the base layer of the workin...

Embodiment 2

[0069] A copper mine tailings pond has reached the designed storage capacity, with a top surface area of ​​60 hectares, a dam height of 30m, a dam bottom width of 75m, a dam crest width of 15m, and a slope of 45°. , the daily discharge of tailings mud is 0.9 million m 3 , using the method provided by the invention to increase storage capacity. The specific method is as follows:

[0070] ① Analyze the existing tailings pond, and divide the tailings pond into two areas according to the carrying capacity of tailings mud, area I and II, and area I is the area with large tailings mud particle size, good deposition effect and slightly stronger carrying capacity About 10 hectares; Area II is an area with insufficient carrying capacity and a muddy surface, about 50 hectares. In area Ⅰ, the bearing capacity is slightly stronger, and the geotextile is properly paved as the base layer of the working cushion; in area Ⅱ, a layer of geotextile is firstly paved as the surface support, and ...

Embodiment 3

[0075] An iron ore tailings pond in a certain mine has reached the designed storage capacity, with a top surface area of ​​150 hectares, a safety dam height of 48m, a dam bottom width of 120m, and a dam crest width of 10m. The daily discharge of tailings slurry is 30,000 m 3 , using the method provided by the invention to increase storage capacity. The specific method is as follows:

[0076] ① Analyze the existing tailings pool, and divide the tailings pool into three areas according to the carrying capacity of tailings mud, area Ⅰ, Ⅱ, and Ⅲ, and area Ⅰ is the area on the boundary of the tailings pool with sufficient carrying capacity, about 5 hectares; area Ⅱ is an area with large tailings mud particle size, good sedimentation effect, and slightly stronger bearing capacity, about 50 hectares; area Ⅲ is an area with no bearing capacity and a thin muddy surface layer, which must be treated properly to have a follow-up The construction capacity is about 95 hectares. Area Ⅰ doe...

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Abstract

The present invention discloses a method for improving an in-service tailings pond capacity and a device thereof, belonging to a field of tailings pond expansion technology. The method and the device are realized through a three-step tailings pond processing: a step of installing a working cushion for a tailings pond with a designed pond capacity and constructing a drainage system for drainage consolidation; a step of increasing the dam body height, discharging new tailings mud into the pond, and installing the working cushion and constructing a drainage system for a second time when the mud reaches the newly-increased dam body height; a last step of conducting consolidation processing on the newly-discharged tailings mud and storing the mud in different areas and on different layers via a paving system. The method for improving the in-service tailings pond capacity and the device thereof substantially reduce horizontal acting force of original tailings mud on an original tailings dam while a saturation line of the tailings dam body is lowered, with safety of the tailing pond improved, void ratio of a tailings soil mass greatly reduced, and the capacity of the tailings tank enhanced. Therefore the service life of the tailings pond is prolonged. The construction device of improving in-service tailings pond capacity has characteristics of easy operation, flexible combination, quick operation, and succinct and efficient construction technology.

Description

technical field [0001] The invention belongs to the technical field of mine mining, and relates to the technical field of mine tailings dam stacking, in particular to a method and a device for increasing the capacity of tailings ponds in service. Background technique [0002] Tailings refer to the ore mined in the mine, and the "waste residue" discharged after the valuable concentrate is selected by the concentrator. The disposal of tailings is usually to mix these tailings with a large amount of water to make a very thin tailings slurry, and then use a pump to transport it to a designated place for storage. In order to store these fluid slurries, it is usually necessary to build a dam (called a tailings dam) to prevent the slurry from leaking out and form a tailings pond. The fluid mud has a large horizontal force on the dam body, and this force increases exponentially with the increase of the dam height, so the height of the tailings dam will be limited, that is, the volu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/18
Inventor 杨建伟程寅于浩黄新
Owner BEIHANG UNIV
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