Pipe network system and construction method for treating frozen soil in tailings pond

Abstract

The invention discloses a pipe network system used for solving the problem of frozen soil in a tailing pond, and a construction method thereof. The pipe network system comprises horizontal ventilation pipes and vertical connection pipes, wherein the end heads of the horizontal ventilation pipes extend out of the tailing pond and communicate with the atmosphere; the middle sections of the horizontal ventilation pipes communicate with a flood draining facility of the tailing pond through the vertical connection pipes; and the horizontal ventilation pipes on the same elevation surface can be of a pipe network structure. The construction method of the pipe network system comprises the following steps: starting to accumulate tailings and pre-embedding the vertical connection pipes after the initial dam of the tailing pond and the flood draining facility are constructed; pre-embedding the first-stage horizontal ventilation pipes after the accumulation elevation of the tailings is higher than the elevation of the dam crest of the initial dam, wherein inclined connection pipes can be selectively pre-embedded; and increasing the elevation and the number of the vertical connection pipes, the horizontal ventilation pipes and the inclined connection pipes stage by stage with the rising of the accumulation elevation of the tailings until laying is completed. The pipe network system disclosed by the invention is simple in structure, convenient to construct and capable of efficiently solving the problem of the frozen soil in the tailing pond, and can further be used as a draining and seepage channel in the case of a high precipitation amount.

Description

technical field [0001] The invention belongs to the field of mine tailings ponds, and in particular relates to a pipe network system and a construction method for controlling frozen soil in tailings ponds. Background technique [0002] Permafrost refers to various rocks and soils below zero degrees Celsius and containing ice. Frozen soil involves the coupling of the physical properties of soil, water, and ice, as well as the heat conduction of the atmosphere, the frozen soil layer, and the underlying rock and soil mass. [0003] The phenomenon of permafrost in tailings ponds is essentially the same as that in nature, both have freezing and thawing processes, and can be divided into permafrost and seasonal permafrost, but there are also significant differences: 1 ) The ground in nature is basically fixed, while the beach surface of tailings accumulation dams is constantly rising, and the ice surface rises and the beach surface rises synchronously. Depth of permafrost; 2) Wh...

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Problems solved by technology

[0007] 2) Reduce the precipitation effect of drainage facilities: due to the water-proof effect of the deep frozen layer, whether it is vertical seepage drainage or horizontal drainage, or the drainage of pre-buried or added later, it is due to the water-proof effect of the horizontal frozen layer. It is difficult to form a vertical precipitation funnel, which greatly reduces the precipitation effect of drainage facilities

[0008] 3) Decrease the stability of the dam body: the buried depth of the soaking line is an important factor affecting the slope stability of the tailings dam, and the increase of the soaking line will inevitably reduce the stability of the dam slope

[0014] Although the permafrost problem can be reduced to a certain extent after the above-mentioned measures are taken, it will inevitably affect mine production.

Especially in order to prevent the formation of deep permafrost, the ore drawing measures in front of the dam can only be resumed after the permafrost melts, which will directly lead to a significant reduction in mine production, or even stop production

For areas with a long freezing period, the permafrost layer is relatively thick, and the thawing time is correspondingly long. The production reduction or shutdown time is too long, and the economic loss is often unbearable.

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