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Technique for raising storage content of stockpiled tailing reservoir

A process method and technology of tailings ponds, which are applied in the technological field of increasing the storage capacity of stockpiled tailings ponds, can solve problems such as prominent environmental problems, increased tailings transportation distance, and increased investment costs, and achieve enhanced stability and reduced Lateral force action, the effect of improving safety

Inactive Publication Date: 2015-05-13
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the scarcity of land resources and prominent environmental problems, the investment cost of site selection and construction of new tailings ponds will increase, and the distance of tailings transportation will increase. Mining companies will bear huge construction and transportation costs, causing serious adverse effects on their development.

Method used

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  • Technique for raising storage content of stockpiled tailing reservoir
  • Technique for raising storage content of stockpiled tailing reservoir

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] A bauxite tailings pond with a full storage capacity, the top surface area of ​​the pond is 120 hectares, the tailings dam is 25m high, and the current daily discharge of tailings mud is 20,000 m 3 , using the method provided by the invention to increase the storage capacity of the tailings pond. The specific method is as follows:

[0035] Due to the short stockpiling time, the free water on the surface has been basically drained, but the average pore ratio of the mud is still as high as 1.2, the pores are relatively large, the density is small, and the bearing capacity is small. The tailings slurry is medium-coarse sand with a clay content of 5% by mass. The tailings pond is expanded according to the following process steps:

[0036] ①The stockpiled tailings slurry in the tailings pond is medium-coarse sand and the mass percentage of clay is less than 10%. The single-point vibrating compaction construction technology is used to drain and densify the stockpiled tailin...

Embodiment 2

[0041] A bauxite tailings pond that is being stockpiled has a roof area of ​​250 hectares, a tailings dam height of 30m, and the current daily discharge of tailings slurry is 15,000m 3 , using the method provided by the invention to increase the storage capacity of the tailings pond. The specific method is as follows:

[0042] The tailings pond that has already been stockpiled belongs to the tailings pond that is being stockpiled. Since the tailings slurry is still being discharged, the overall water content of the tailings slurry is very high. The average void ratio of the slurry is 1.8, and the tailings slurry cannot directly withstand construction. Mechanical and personnel operations, and tailings mud belongs to cohesive soil. The tailings pond is carried out according to the following process steps:

[0043] ①Set a vertical drainage pipe in the tailings mud, and then lay a 40cm sand cushion on the mud surface to form a horizontal drainage channel, which is covered with a...

Embodiment 3

[0047] A full-capacity iron ore tailings pond with a roof area of ​​80 hectares and a tailings dam height of 20m. The current daily discharge of tailings mud is 12,000 m 3 , using the method provided by the invention to increase storage capacity. The specific method is as follows:

[0048] After a long period of free deposition of the mud stored in the tailings pond of the full storage capacity, the surface free water has been drained, and the average pore ratio of the mud is 0.8. The tailings mud has relatively small pores, high density, and high bearing capacity. And the tailings mud belongs to fine sand and the clay is close to 20%. The tailings pool is carried out sequentially according to the following process steps:

[0049] ①The tailings mud is fine sand and the clay is close to 20%. The three-point vibratory compaction process is used to drain and densify the stockpiled tailings mud. Three models of ZCQ-30 and motor power of 30kW are used The vibrator produces high-...

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Abstract

The invention discloses a technique for raising storage content of stockpiled tailing reservoir, belonging to the mine tailing dam construction technology in the technical field of mining. In the technique, a proper dewatering and densifying construction technology is adopted to drain the water from a stockpiled tailing slurry with high water content, making the tailing slurry dense to become a solid self-supporting tailing soil with low water content, thereby vacating part of the storage capacity. And the subsequent tailing slurry is infused organizedly into different zones and layers to become the solid self-supporting tailing soil, thereby ultimately forming a solid self-supporting tailing stockpiling body with high compactness after constructing the tailing slurry layer by layer till the design height, and expanding storage capacity for the stockpiled tailing reservoir. By using the method, the stockpiled tailing slurry can be rapidly dewatered and densified to vacate bulk storage capacity for the stockpiling of the subsequent tailing slurry. Meanwhile, the tailing slurry can realize solid self-support stockpiling, improving stability, and the lateral force of the tailing slurry to a tailing dam is greatly reduced, raising safety for the tailing dam.

Description

technical field [0001] The invention relates to a process method for increasing the storage capacity of a stockpiled tailings dam, which belongs to the mine tailings dam stacking technology in the field of mining technology. Background technique [0002] The tailings dam is a dam-like building that accumulates the mud and slag discharged after the hydro-separation process. The dam body mainly stores the tailings slurry or other industrial wastes discharged after the mine beneficiation, which plays a great role in the protection and management of the mine environment. The tailings discharged from mineral processing are usually dilute mud with high water content, which are usually transported to the tailings storage by pumping devices through pipelines. With the increase of fluid mud storage in the tailings pond, the horizontal force exerted on the tailings dam increases exponentially with the increase of the dam height, so the design height of the tailings dam will be limited...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D3/10
Inventor 程寅吴大龙于浩杨建伟黄新
Owner BEIHANG UNIV
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