Method for hydraulic tailing flushing and filling damming through mold bag boundaries

Abstract

The invention discloses a method for hydraulic tailing flushing and filling damming through mold bag boundaries. The method comprises the steps that a weak foundation on a tailing beach is reinforced firstly, and the subgrade bearing capacity of loaded sub-dams is improved; the sub-dams are built by stages by adopting tailing-filled mold bags as the boundaries of the sub-dams, specifically, the stacking height each stage is 10-15 m; dam bodies of the middle portion formed by stacking the mold bag sub-dams are built in a filled mode through a hydraulic flushing and filling method, and the top width of the dam bodies is larger than the required minimum dry beach length of a tailing pond; and flow areas on the tops of the dam bodies formed through hydraulic flushing and filling are reinforced, after the sufficient bearing capacity is achieved, the mold bag sub-dams are adopted for capping, and then damming is completed. According to the method, the requirement for intensity of filling operation for the mold bags is low, the thickness of traditional mold bag sub-dams can be significantly increased, meanwhile, the dry beach length of the tailing pond is increased, and the flood prevention capacity and stability of the tailing pond are improved.

Description

technical field [0001] The invention relates to the technical field of tailings equipment, in particular to a method for filling a dam by hydraulic flushing of tailings from mold bag side stalks. Background technique [0002] Tailings pond is a special artificially constructed industrial building, which is used to pile up a large amount of waste rock, waste residue, waste water, etc. generated during the mining of mineral resources. As one of the three major mine control projects, the normal operation of the tailings pond not only affects the economic benefits of the mining enterprises, but also affects the safety of life and property of the downstream residents in the reservoir area and the stability of the surrounding ecological environment. As the main project of the tailings dam, the tailings dam is a huge source of danger that may cause high potential energy debris flow, and there is a danger of dam failure. Therefore, the stability of the tailings dam is one of the ke...

AI Technical Summary

Problems solved by technology

[0004] (1) The infiltration line in the dam body is relatively high, which can easily cause seepage damage or landslides in the dam body, especially liquefaction during earthquakes;

[0005] (2) The fine-grained tailings have high moisture content, difficult dehydration and consolidation, and low dam formation efficiency, which affects the production progress of the mine;

[0006] (3) The traditional upstream method is limited by the coarse sand content, the dam body of the sub-dam is thin and the stability is not high

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