Seepage drainage system for initial dam of cohesive soil in tailings reservoir

Abstract

The invention discloses a seepage draining system of a tailing pond cohesive soil initial dam. The seepage draining system consists of a fitting-slope seepage draining layer and a percolating water discharging pipeline; the fitting-slope seepage draining layer is formed by sequentially laying a laminated sodium-based bentonite waterproof carpet (1), a coarse sand layer (2), a pebble layer (3) and a block stone layer (4), the percolating water discharging pipeline consists of a UPVC water discharging pipe (5) and terylene geotextile (7) covering the end part (6) of the UPVC water discharging pipe (5), and a flower hole is formed in the end part (6) of the UPVC water discharging pipe; the end part (6) of the UPVC water discharging pipe is arranged on the inner lower part of the fitting-slope seepage draining layer. By adopting the seepage draining system, the seepage draining and water reduction function can be well realized, the seepage supply source of the initial dam can be effectively blocked, the safety of the cohesive soil initial dam can be guaranteed, and the construction property in the building period of the initial dam can be realized; moreover, the seepage draining system has characteristics of convenience in operation, high reliability and low cost and is unlikely to block in the operation process of a tailing pond, high in reliability, long in service life and capable of meeting the seepage draining requirement of the tailing pond cohesive soil initial dam.

Description

technical field [0001] The invention relates to a dam body drainage system for a tailings reservoir, in particular to a dam body drainage system for an initial cohesive soil dam, and is especially suitable for tailings reservoirs built by the upstream method to realize the dam body drainage of an initial cohesive soil dam. Seep. Background technique [0002] Tailings pond is an important facility in mine production. It is not only an artificially formed high-level debris flow hazard source, but also a source of environmental pollution. It is one of the major hazard sources in non-coal mines. has great practical significance. Tailings dams using upstream tailings dams are widely used in my country due to their low cost; upstream tailings dams are composed of initial dams and later accumulation dams. The initial dams are generally constructed of stone or earth materials. In areas where stones are scarce Soil materials are commonly used to pile up the dam. Although the initial...

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Problems solved by technology

[0006] (1) Most of the existing seepage drainage facilities are arranged on the outer slope of the initial dam, and their seepage drainage effect is limited in vertical and horizontal depths, and the infiltration line is already at a high position when it functions, which is not good for the safety of the dam body

[0007] (2) Most of the existing seepage drainage facilities use artificial geosynthetic materials for drainage, which is prone to silting during the operation of the tailings pond, resulting in a greatly reduced seepage effect

[0008] (3) Existing seepage drainage facilities fail to cut off the source of seepage supply and fail to achieve essential safety

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