Damming method for tailing dam

Abstract

The invention discloses a damming method for a tailing dam and relates to a method for directly embanking the tailing dam by adopting fine-grain tailings. The method is characterized in that a die bag filled with tailing sand is adopted for embanking a dam body during the damming process. In the damming method for the tailing dam, the die bag method is adopted for stacking the dam by adopting the tailings, the median grain diameter of the tailings can be fully utilized, and the properties of being water permeable and non-slurry permeable of the die bag are utilized, thereby having the advantages of being fast in drainage and consolidation speed and being conductive to fast damming, and effectively solving the difficult points in stacking of the dam by adopting finer grains; furthermore, the process is mature, the operation is simple, the damming can be performed while performing production, and the production is not affected, thereby being a big progress in comparison with the traditional upstream method for damming.

Description

technical field [0001] A method for building a tailings dam relates to a method for directly stacking a tailings dam with fine-grained tailings. Background technique [0002] At present, more than 150 kinds of minerals have been discovered in my country, and more than 8,000 mines have been built, accumulatively producing 5.97 billion tons of tailings, and the annual growth rate is still 300 million tons. The disposal method of tailings is still based on ground stockpiling. At present, there are more than 12,000 tailings ponds according to statistics, and more than 90% of them adopt the upstream method of damming. [0003] The tailings particle size of the upstream dam stacking method is generally controlled at -200 mesh and the content does not exceed 80%, especially for high dams with a height of more than 60m, the requirements for tailings particle size are more stringent. For tailings with -200 mesh content exceeding 80% It is generally considered that it is not suitable...

AI Technical Summary

Problems solved by technology

[0006] After the dam is built with fine-grained tailings, the poor seepage drainage in the dam body will cause the wettability of the dam body to be too high, so that the tailings sand will be in a saturated state for a long time, and the tailings will consolidate very slowly, which is not conducive to improving the strength of the tailings and thus affecting The stability of the dam body, there is a potential risk of dam failure, and many tailings pond disasters that currently occur are caused by excessive wettability in the dam body

[0007] The dam construction with fine particle tailings has low mechanical strength, long consolidation time, and slow dam-building speed. For large and medium-sized mines, the dam-building speed will affect the normal production of the mine dressing plant

[0008] The final accumulation height of the dam with fine particle tailings is greatly restricted. According to domestic experience, fine particle dams should not exceed 30m, which is obviously uneconomical for tailings ponds that occupy a large area

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