A Method of Quickly Stacking Fine Grain Tailings Using Improved Pool Filling Method

Abstract

A method of rapidly stacking fine-grained tailings by using an improved pond filling method, using special geogrids and geotextiles as the enclosure of the pond-filling method and a drainage pipe network system, so that the fine-grained tailings can be filled into the geocell After the skeleton, the drainage facilities are effectively drained and consolidated, and the natural settlement makes the entire dam body form a large rigid structure with lateral restrictions and high tailings density. The method for stacking fine-grained tailings in the present invention is simple to operate, greatly reduces the on-site engineering quantity of tailings workers, and effectively reduces project investment; effectively solves the problem that personnel cannot enter the beach of fine-grained tailings and cannot use fine-grained tailings The problem of tailings pile enclosure. It not only promotes the safe operation of the tailings pond, but also improves the efficiency of dam construction and reduces the operating cost of the tailings pond.

Description

technical field [0001] The invention relates to the field of tailings pond construction, in particular to a method for rapidly stacking fine-grained tailings by using an improved pool filling method. Background technique [0002] According to statistics, as of 2020, there will be more than 6,000 tailings ponds in my country, of which more than 10% are fine-grained tailings ponds. The development of fine-grained mineral beneficiation technology has led to the development trend of fine-grained tailings. Fine-grained tailings have the characteristics of poor permeability, strong water holding capacity, long consolidation time, and low mechanical strength, and the water level in the tailings reservoir area is high during the accumulation process, which has caused difficulties for tailings dams. [0003] The following engineering problems exist in fine-grained tailings dam construction: 1. The dry beach formed by fine-grained tailings has a short distance and gentle slope; 2. The...

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Problems solved by technology

Fine-grained tailings have the characteristics of poor permeability, strong water holding capacity, long consolidation time, and low mechanical strength, and the water level in the tailings reservoir area is high during the accumulation process, which has caused difficulties for tailings dams

[0003] The following engineering problems exist in fine-grained tailings dam construction: 1. The dry beach formed by fine-grained tailings has a short distance and gentle slope; 2. The tailings classification effect of fine-grained tailings is worse than that of coarse-grained tailings; 3. The infiltration line of the tailings pond is high, which is not conducive to the stability of the dam body; 4. In the upstream method of damming, sand is generally taken from the surface of the dry beach to pile up, but the dry beach surface of the fine-grained tailings dam is wet and soft, and sand is taken manually There is a certain risk, so sand extraction in front of the dam is restricted, and additional costs need to be added; 5. Because the particles are finer, the stability of fine-grained dams is far lower than that of coarse-grained tailings dams

Among them, except for one-time dam building, midline dam building, and swirling flow classification, the other methods are still in the stage of experimental verification or preliminary promotion. There are still many problems in technology and technology that have not been resolved, and the cost is high.

[0005] The advantage of the pond filling method in the prior art is that it is applicable to the situation where the tailings have fine particle size, the dam axis is long, the rising speed is fast, and a large flood storage capacity is required; the disadvantage is that the manual construction of the enclosure is heavy, especially for the For some ultra-fine-grained tailings ponds, the beaches are basically mudflats, and personnel cannot enter the beaches, nor can they effectively form enclosures.

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