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Seepage prevention method and application of mine closure and seepage prevention structure and application of mine closure

A technology of anti-seepage and in-situ leaching, applied in the method and application of mine closure anti-seepage, mine closure anti-seepage structure and application field, can solve the problems of secondary pollution, reduce leaching, and be easy to promote , to ensure the effect of stability

Active Publication Date: 2021-11-12
BEIJING GENERAL RES INST OF MINING & METALLURGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The first purpose of the present invention is to provide a method for sealing and preventing seepage of mines, aiming to solve the technical problem of secondary pollution caused by rainwater leaching the ore layer in the prior art

Method used

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  • Seepage prevention method and application of mine closure and seepage prevention structure and application of mine closure

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Embodiment 1

[0044] This embodiment provides a mine closure seepage prevention method. After the mine production is completed, the position of the horizontal anti-seepage curtain is determined, and the horizontal anti-seepage curtain is formed by grouting after the grouting holes are laid.

[0045] The position of the horizontal anti-seepage curtain is between the bottom 1m of the vegetation growth layer and the top surface of the mine layer.

[0046] The seepage prevention method provided by the present invention constructs a horizontal anti-seepage curtain between the ore-bearing layer and the upper rock-soil body to reduce the leaching effect on the ore leaching layer containing the residual ore leaching agent after rainfall infiltration, so that after rainfall infiltration It is directly discharged to the surface in the form of clean water without passing through the leaching layer containing the residual leaching agent. The horizontal anti-seepage curtain can greatly reduce the amount...

Embodiment 2

[0074] This embodiment provides a mine closure seepage prevention structure, such as figure 1 The schematic diagram of the seepage prevention structure of the mine closure is shown. In the mine closure seepage prevention structure provided by the present invention, a horizontal anti-seepage curtain 1 is arranged on the surface of the ore body, which provides a seepage interception barrier for the ore body 4, prevents infiltration rainwater from reaching the mine bed and leaching the mine bed to cause pollution, and reduces tailings. The amount of water produced and the concentration of pollutants in the tail water. The rock and soil mass is integrated with the seepage intercepting barrier to prevent landslides and ensure the stability of the mountain.

[0075] The geological body where the ore body 4 is located includes unweathered bedrock 64, slightly weathered layer 63, moderately weathered layer 62, fully weathered layer 61 and vegetation growth layer 5 stacked from bottom...

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Abstract

The invention provides a mine closure seepage prevention method and its application, a mine closure seepage prevention structure and its application, and specifically relates to the technical field of mine groundwater pollution prevention and control. In this mine field sealing and anti-seepage method, the position of the horizontal anti-seepage curtain is determined after the mine production is completed, and the grouting hole is arranged to form a horizontal anti-seepage curtain; the position of the horizontal anti-seepage curtain is from 1m below the bottom of the vegetation growth layer to Between the top of the mine seam, the horizontal anti-seepage curtain is mainly formed by the solidification of anti-seepage materials. The anti-seepage materials include 70-80% cement, 1-10% bentonite, 2-5% lime, 0.1-1% accelerator, and the rest The amount is water. The mine closure seepage prevention structure provided by the invention includes a horizontal antiseepage curtain. The field sealing and anti-seepage method provided by the invention reduces the leaching effect of rainfall on the ore leaching layer containing residual ore leaching agent, reduces the amount of tail water produced and the concentration of pollutants in the tail water.

Description

technical field [0001] The invention relates to the technical field of mine groundwater pollution prevention and control, in particular to a mine closure seepage prevention method and its application, and a mine closure seepage prevention structure and application. Background technique [0002] my country's ionic rare earth ores (also known as weathering crust elution-type rare earth ores) are mainly distributed in South China, rich in medium and heavy rare earth elements such as terbium and dysprosium, and are important strategic resources of world concern. Ionic rare earth deposits are distributed in low mountain and hilly landform areas, and are formed by rare earth-bearing granite and other volcanic rocks through strong weathering under the conditions of warm and humid climate and low mountains and hills. The ore bodies are generally rich in fully weathered and semi-weathered zones. [0003] At present, the in-situ leaching process is the only mining process allowed for ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22B3/02C22B3/04C22B59/00
CPCC22B3/02C22B3/04C22B59/00Y02P10/20
Inventor 陈玉福祝怡斌陈斌陈谦杨晓松
Owner BEIJING GENERAL RES INST OF MINING & METALLURGY