Strong draining and seepage-based upstream type tailings pond fill dam and damming technology thereof

Abstract

The invention discloses a strong draining and seepage-based upstream type tailings pond fill dam. The strong draining and seepage-based upstream type tailings pond fill dam is built by an upstream type damming method on the basis of a two-level dam structure of a tailings pond, wherein the two-level dam structure comprises a primary dam and a seepage-prevention dam; fine-grain tailings are piled up in an upper pond of the seepage-prevention dam, and coarse-grain tailings are piled up in a lower pond between the primary dam and the seepage-prevention dam; a tailings pond bearing body is formed by the coarse-grain tailings under the action of hydraulic classification; the seepage-prevention dam is taken as a dividing line for the upper pond and the lower pond, and the seepage lines of the upper pond and the lower pond intersect on the seepage-prevention dam. The damming technology of the tailings pond fill dam comprises the following steps: firstly, constructing to build the seepage-prevention dam to cause the upper pond to form a coarse-grain tailings depositing beach; then, constructing the primary dam in the downstream area of the seepage-prevention dam, respectively piling up the fine-grain tailings and the coarse-grain tailings in the upper pond and the lower pond, and lifting the fine-grain tailings to the upper pond by a pump ship in a temporary stagnant area in the upstream area out of the depositing beach; finally, the tailings are piled to a final elevation by an upstream type damming method. The strong draining and seepage based upstream type tailings pond fill dam is favorable for further improving the safety and the economy of the tailings pond by combining with the advantages of the upstream type damming method.

Description

technical field [0001] The invention relates to a tailings reservoir accumulation dam and a dam-building process thereof, in particular to a tailings reservoir accumulation dam based on strong drainage and seepage upstream dam-building and a dam-building process thereof. Background technique [0002] The place used to store tailings discharged from metal and non-metallic mines after ore sorting is called a tailings pond, and a tailings dam is a peripheral structure of a tailings pond that blocks tailings and water, usually referring to an initial dam and a tailings accumulation dam overall. The initial dam refers to a dam built with soil, stone materials, etc., and used as a drainage or support for tailings accumulation dams. Tailings accumulation dam refers to the dam formed by the accumulation of tailings during the production process. [0003] The initial dam of the tailings pond is mainly used as the foundation dam of the tailings pond accumulation dam in the middle an...

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Problems solved by technology

However, this scheme also has the following disadvantages: First, this scheme increases the infrastructure investment of the grading station, and the grading station brings a lot of troubles to production, such as the inconvenient movement of the grading station, the difficulty of operation and management, and the high cost of operation and maintenance. ; Second, the tailings between the two dams are only provided with bottom seepage drainage, and the seepage effect is relatively limited, making it difficult to ensure rapid and sufficient drainage of the tailings in this area

[0011] It can be seen from the above that although the existing upstream dam construction method and its improvement have certain advantages, there are still some shortcomings, and the improvement measures are not perfect. The main material of the accumulation dam is unsaturated soil, and the related research on unsaturated soil Immature, especially its seepage problem, its seepage parameters and calculation methods need further research and analysis

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