A method for building a dam with two-way permeation and reverse laying drainage prisms

Abstract

The invention discloses a damming method through seepage draining prism bodies realizing bidirectional permeation and reverse laying. The method comprises the following steps that flexible water permeable cylinders are laid into a dam along a natural slope of a dry beach; water guide pipes and joints are laid from the outside of the dam into a tailing pond along the lower portions of the longitudinal flexible water permeable cylinders to form water guide systems; seepage draining pipes are penetrated into the water permeable cylinders and are connected with the water guide systems; tailing sand is injected into the water permeable cylinders, and the longitudinal flexible water permeable cylinders form longitudinal seepage draining prism bodies; a transverse flexible water permeable cylinder is laid in parallel along a fill dam; a seepage drainage pipe is penetrated into the transverse flexible water permeable cylinder, and the outlet of the seepage drainage pipe is connected with the seepage draining pipes of the longitudinal prism bodies; tailing sand is injected into the transverse flexible water permeable cylinder, fine tailings and water in the tailing sand flow into the seepage draining pipes of the longitudinal seepage draining prism bodies through the internal seepage drainage pipe to be discharged, and the transverse flexible water permeable cylinder forms a transverseseepage drainage prism body as a tailing pond water permeable fill dam; and the space between the adjacent longitudinal prism bodies is filled with the tailing sand to form the dry beach. The method is simple in construction, good in stability, high in strength, rapid in damming and low in cost.

Description

technical field [0001] The present invention is applied to a dam building method for high water content, fine particle solid waste stockpiling, high concentration, fine tailings upstream dam building tailings reservoir dam, specifically refers to a two-way permeable reverse laying Drainage prism dam method. Background technique [0002] Most of the mine tailings are transported by pipelines, and the tailings ponds are built by upstream dams. Due to the beneficiation needs of non-ferrous metals and gold mines, the tailings particles are negative 200 mesh and reach more than 80%. It is difficult to directly build dams with tailings, and most of them use rotary Construction of sub-dams with flow-packed bags or external materials requires high dam-building costs. When constructing the sub-dam, the foundation of the sub-dam is located on the dry beach, and the discharge of fine tailings particles cannot form a dry beach, and the heap body consolidates slowly. It is necessary to ...

AI Technical Summary

Problems solved by technology

[0002] Most of the mine tailings are transported by pipelines, and the tailings ponds are built by upstream dams. Due to the beneficiation needs of non-ferrous metals and gold mines, the tailings particles are negative 200 mesh and reach more than 80%. It is difficult to directly build dams with tailings, and most of them use rotary Construction of sub-dams with flow-packed bags or external materials, the cost of dam construction is high

When constructing the sub-dam, the foundation of the sub-dam is located on the dry beach, and the discharge of fine tailings particles cannot form a dry beach, and the heap body consolidates slowly, so it is necessary to use foreign materials to strengthen the foundation, occupying a large amount of storage capacity and wasting effective resources

The strength of the dry beach is weak, and the internal deformation of the dry beach is caused by the extrusion of foreign materials used in the swirl bagging dam and the reinforcement foundation. The overall stability of the tailings pond is out of balance, and it is easy to cause deformation and dam failure

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