A Midline Tailings Dam Construction Method Using Die Bags

Abstract

The invention discloses a median type tailing damming method utilizing mold bags. The median type tailing damming method has the advantages that the grouted mold bags 7 are piled up to build a downstream dam body 2, the downstream dam body 2 is kept clean and smooth by the sand consolidation effect of the mold bags 7, and the environmental problems such as dust flying, gullying and coarse sand loss are solved well; tailing pulp with the content of tailing particles, smaller than 0.05mm in size, not larger than 40% (by weight) is taken as mold bag filling pulp for the mold bags 7, so that the particle size range of tailing sand available for damming is widened, sand quantity available for the median type tailing damming method is increased, water drainage of the mold bags 7 can be accelerated, solidification can be speeded up, and grouting efficiency of the mold bags 7 is improved; in addition, the action of gravity is fully utilized for grouting, and the mold bags 7 can be grouted by multiple branch ore drawing pipes 92 at the same time, so that cost and energy consumption are reduced, and damming efficiency is improved.

Description

technical field [0001] The invention relates to the field of tailings pond construction, in particular to a centerline tailings dam construction method using mold bags. Background technique [0002] Tailings pond is a special industrial building used to store a large amount of waste rocks, waste residues, waste water and other wastes generated in the mining process. Whether the tailings reservoir can operate normally is not only related to the economic benefits of mining enterprises, but also affects the safety of life and property of residents downstream of the reservoir area and the stability of the surrounding ecological environment. The tailings dam is the main project of the tailings pond. It is a man-made debris flow hazard source with high potential energy, and there is a danger of dam failure. Therefore, the stability of the tailings dam is one of the key factors related to the normal operation of the tailings pond. . [0003] At present, according to the moving di...

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Problems solved by technology

[0009] However, the existing midline tailings damming method needs to consume more coarse-grained tailings, and with the continuous improvement of the beneficiation process, the content of fine-grained tailings in the storage tailings is getting higher and higher. In the case of insufficient tailings, it is difficult to use the existing centerline tailings damming method for damming

In addition, the dam body constructed by the existing midline tailings dam construction method has a steep slope, a gentle slope, and no platform structure on the downstream dam body 2, which has certain safety hazards, and the dam surface is prone to dust and anti-scouring in windy days. The ability is poor, and it is easy to form gullies when encountering heavy rainfall, resulting in the loss of coarse sand and polluting the environment

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