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Technical treatment method for preventing and treating heavy metal pollution of underground backfill of mine to underground water

A technical treatment and groundwater technology, applied in water/sewage treatment, mining wastewater treatment, adsorbed water/sewage treatment, etc., can solve the problems of ineffectiveness and heavy metal pollution of groundwater, and achieve the effect of solving the problem of heavy metal pollution

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Problems solved by technology

[0002] During the mining process of many non-ferrous metal mines, or when the underground mineral deposits are mined and hollowed out, the goaf needs to be backfilled to prevent the goaf from collapsing; the backfill is generally the ore rock mass and rock mass destroyed during the mining process. Waste slag, etc., the surface of these backfilled solid waste particles may contain a large amount of heavy metal elements. When the groundwater level rises and submerges the above-mentioned backfill filling, due to the natural dissolution and leaching of groundwater, the heavy metal elements on the surface of the backfill filling will be dissolved into groundwater, thereby causing heavy metal pollution to groundwater; at present, for the above-mentioned serious problems, there has not been an effective prevention and treatment method, and it is urgent to wait for a solution

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  • Technical treatment method for preventing and treating heavy metal pollution of underground backfill of mine to underground water

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[0015] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by those skilled in the art to which the present invention belongs. "First", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Comprising" or "comprising" and similar words mean that the elements or items appearing before the word include the elements or items listed after the word and their equivalents, without excluding other elements or items. Words such as "connected" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "Down", "Left", "Right" and so on are only used to indicate the relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may also change acc...

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Abstract

The invention relates to a technical treatment method for preventing and treating heavy metal pollution of underground backfill of a mine to underground water. The technical treatment method comprises the following steps: S1, treating a mixed backfill; S2, laying the mixed backfill in a multi-layer vertical stacking mode, and laying a layer of ceramic nanometer material between any two adjacent filling layers; and S3, arranging a bentonite blocking layer with a certain thickness on the periphery of the multiple mixed backfill layers to prevent underground water from permeating. The mixed backfill material layers and the ceramic nanometer material layers are arranged, the ceramic nanometer materials are mixed in each mixed backfill material layer to adsorb, passivate and stabilize heavy metal ions in backfill materials and water, and meanwhile polluted underground water is thoroughly prevented from spreading outwards by means of the bentonite blocking layer. Therefore, heavy metal ions carried in the backfill can be effectively removed and dissolved in the underground water, so that pollution to the underground water is thoroughly avoided.

Description

technical field [0001] The invention relates to a technical treatment method for preventing heavy metal pollution of underground water caused by underground mine backfilling. Background technique [0002] During the mining process of many non-ferrous metal mines, or when the underground mineral deposits are mined and hollowed out, the goaf needs to be backfilled to prevent the goaf from collapsing; the backfill is generally the ore rock mass and rock mass destroyed during the mining process. Waste slag, etc., the surface of these backfilled solid waste particles may contain a large amount of heavy metal elements. When the groundwater level rises and submerges the above-mentioned backfill filling, due to the natural dissolution and leaching of groundwater, the heavy metal elements on the surface of the backfill filling Will be dissolved in groundwater, thereby causing heavy metal pollution to groundwater; At present, for the above-mentioned serious problems, there is no effec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F1/28E21F15/00C02F101/20C02F103/10
CPCC02F1/281E21F15/005C02F2103/10C02F2101/20C02F2305/08
Inventor 董桂海李丽佟德凯张曼曼王超峰
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