Drainage method, seepage system and application of fine-grained tailings reservoir

Abstract

The invention provides a seepage drainage method, a seepage drainage system and an application of a fine-grained tailings pond, and relates to the technical field of tailings treatment. This seepage drainage method adopts a floating body to set up a seepage drainage area on the beach surface of the tailings reservoir. In the seepage drainage area, the coarse tailings are deposited and consolidated to form a base and a sand wall, and a seepage body is set in the sand wall. The permeability coefficient of granular tailings is higher than that of fine tailings, so the water in coarse tailings will first enter the aqueduct along the seepage body and then flow to the sub-dam drainage ditch for discharge, while the fine tailings outside the seepage area Granular tailings contain a large amount of water. With the difference in pore water pressure inside and outside the seepage area, the water in fine tailings gradually accumulates in the seepage area and enters the seepage body. The coarse tailings sand wall is used to filter fine Granular tailings, the seepage body reverse-filters the coarse tailings, so that the seepage body is not easy to be blocked by fine tailings, realizes the drainage of fine tailings, increases the seepage area of ​​the dam body and the seepage slope, and improves drainage efficiency.

Description

technical field [0001] The invention belongs to the technical field of tailings treatment, and in particular relates to a seepage discharge method, a seepage discharge system and an application of a fine-grained tailings reservoir. Background technique [0002] At present, there are more and more fine-grained tailings entering the tailings pond in my country, and they are widely found in copper ore, gold ore, lead-zinc ore, alumina ore, phosphate rock and other fields. The stockpiling of fine tailings has become a difficult problem faced by many mining enterprises. This is mainly due to the small permeability coefficient of fine-grained tailings, poor water permeability, and long consolidation time. Compared with general tailings dams, fine-grained tailings dams require a longer time for drainage and consolidation in the lower dam body, which is often difficult Meet production needs. Moreover, the infiltration line of fine-grained tailings accumulation dams is generally hi...

AI Technical Summary

Problems solved by technology

When the particle size of the tailings is too fine, the geosynthetics reverse filter fine tailings are prone to clogging, and it is difficult to achieve the expected drainage effect

And for fine-grained tailings ponds, dry beaches often have gentle slopes and weak beach surfaces, and most of the seepage bodies in front of the dam are arranged in a small area in front of the dam that meets the construction bearing capacity requirements. For the entire tailings dam body, seepage drainage The effect is limited, and it is difficult to accelerate the consolidation of fine-grained tailings in the reservoir and control the seepage line of the dam body

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