Novel heightening expanding method for one-time constructed dam ultra-fine tailings pond through midline method

Abstract

The invention discloses a novel heightening expanding method for a one-time constructed dam ultra-fine tailings pond through a midline method. The method is characterized in that heightening expandingis carried out through a grading and staging construction method, a first-stage heightening dam body (2), a second-stage heightening dam body (3), a third-stage heightening dam body (4) and the likeare sequentially piled and constructed; a row of medium-coarse sand seepage drainage blind ditches (9) which is parallel among each other and perpendicular to the axis of each dam body are constructedin the top layer of the heightened dam body; water drainage communicating pipes (7) and underground water collecting pipes (11) are laid; seepage drainage floral pipes (8) are buried in the medium-coarse sand seepage drainage blind ditches (9) of the heightening dam bodies; and a layer of high-strength corrosion-resistant geogrid (6) is fully paved at every vertical interval of 0.5-1.0 m. According to the novel method, the consolidation of fine tailings is accelerated, the mechanical strength index of the fine tailings is improved, the storage capacity of the tailings pond is remarkably increased, the production service life is prolonged, the pressure of tailings discharge of enterprise production is relieved, and meanwhile the problems that the capacity of part of dumping sites is insufficient and mining waste rocks are piled up are solved.

Description

technical field [0001] The invention belongs to the technical field of tailings pond engineering, and in particular relates to the heightening and expansion technology of tailings ponds for one-time construction of dams, and is particularly suitable for one-time construction of dams and superfine tailings with a content of -200 mesh (-0.074mm) exceeding 82%. Heightening and expansion of mine warehouse. Background technique [0002] Tailings ponds are necessary facilities to maintain the normal production of mining enterprises, and play an important fundamental role in the sustainable and healthy development of the national economy and mining economy. Tailings ponds are also one of the major sources of danger. Once an accident occurs, it will inevitably cause serious damage to the safety of people's lives and property, and pose a serious threat to the environment. Especially in recent years, the global climate has been abnormal, extreme weather conditions have appeared frequ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to heighten the height of the tailings retaining dam of the ultra-fine tailings reservoir of the existing one-time dam and increase the storage capacity. Slow, high safety risk, high cost and other technical problems, but to provide a new method to increase the height and expand capacity of ultra-fine tailings reservoir with one-time dam construction using the center line method

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