Method for wastewater pollution control in waste mine shaft

A pollution prevention and mine wastewater technology, applied in mining equipment, earth drilling, mining equipment, etc., can solve the problems of personnel death and property, underground material transportation, water pollution, etc., to avoid personnel death and property loss accidents, The effect of solving water leakage accidents and solving pollution problems

Active Publication Date: 2016-02-03
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The prevention and control of abandoned mine water pollution by dredging and drainage not only requires a lot of waste water treatment costs, but also has the risk of destroying the natural state of the groundwater environment, resulting in a decrease in the groundwater level and inducing karst collapse. Moreover, this method continuously transfers underground pollutants to the surface. It is easy to cause pollution of mining areas and receiving water bodies; the method of sealing the mine wellhead can effectively prevent the discharge of mine wastewater, and can inhibit the dissolution of harmful heavy metal elements in minerals by isolating the air, so as to solve the problem of waste water pollution in abandoned mines. Accumulated water can easily cause lava collapse, and during the excavation and mining of the lower mine, a large amount of accumulated water in the abandoned mine can easily flow into the lower mine through the stratum cracks and faults in the mining area, causing water seepage accidents in the lower service mine, resulting in death and property loss; abandoned The mine filling method can effectively solve the problem of mine water pollution, but the filling volume of this method is huge, resulting in high cost, and there is a lot of underground material transportation, heavy labor, and a long construction period

Method used

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  • Method for wastewater pollution control in waste mine shaft

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Effect test

Embodiment 1

[0017] Such as figure 1 As shown, the mine waste rock is mixed with the gelling agent (cement + fly ash) according to the mass ratio of 7 / 3, and mixed with water to make a slurry with a solid-liquid mass ratio of 3 / 1; the above slurry is transported to In the mine roadway (1) in the rock mass (6), use it as a material to build an airtight isolation solidification body (2) with a thickness of 5m and an interval of 50m along the mine roadway (1) from the inside to the outside. A compartment (3) is formed therebetween, and the accumulated water in the goaf (5) and the compartment (3) is plugged and sealed, thereby completing the prevention and control of waste water pollution in the abandoned mine roadway (1).

Embodiment 2

[0019] Mix mine tailings with gelling agent (cement + asphalt) at a mass ratio of 5 / 2, and mix with water to make a slurry with a solid-to-liquid ratio of 4 / 1; transport the above slurry to the rock mass (6) In the mine roadway (1) inside, use it as a material to build an airtight isolation solidification body (2) with a thickness of 20m and an interval of 100m along the mine roadway (1) from the inside to the outside, forming compartments between the airtight isolation solidification bodies (3), the stagnant water in the goaf (5) and the compartment (3) is plugged and sealed, and the prevention and control of waste water pollution in the abandoned mine roadway (1) is completed.

Embodiment 3

[0021] Mix mine solid waste (waste rock + smelting slag) with gelling agent (cement + fly ash + asphalt) at a mass ratio of 2 / 1, and mix with water to make a slurry with a solid-to-liquid ratio of 5 / 2 The above-mentioned slurry is transported in the mine roadway (1) in the rock mass (6), and it is 50m to build thickness along the mine roadway (1) from the inside to the outside with it, and the airtight isolation solidification body ( 2), a compartment (3) is formed between the sealed and isolated solidified bodies, the accumulated water in the goaf (5) and the compartment (3) is plugged and sealed, and the prevention and control of waste water pollution in the abandoned mine roadway (1) is completed.

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Abstract

A method for wastewater pollution control in a waste mine shaft is characterized in that mine solid wastes, a gelatinizing agent and water are used to prepare a sizing agent according to certain ratio, the sizing agent is conveyed into a mine shaft tunnel in a rock body, the prepared sizing agent is used to build sealed and isolated solidified bodies with a certain thickness from inside to outside according to a certain spacing distance, compartments are formed among the sealed and isolated solidified bodies, the waste mine shaft is plugged and sealed, and accumulated water in a goaf area and the compartments is blocked and sealed. In this way, the wastewater pollution control of the waste mine shaft is realized.

Description

technical field [0001] The invention relates to a method for preventing and controlling waste water pollution in abandoned mines, in particular to preparing slurry with mine solid waste as raw materials, constructing a closed and isolated solidified body in an interval manner, and performing interval plugging and sealing for abandoned mines, so as to realize effective mine waste water pollution. prevention techniques. Background technique [0002] With the termination of mining activities, a large number of mines are abandoned. Once the mines are decommissioned and the production and drainage stop, a large amount of mine water will be generated in the wells. Because the ore body is accompanied by a variety of metals and sulfide minerals, the mine wall and the waste rock in the shaft will undergo oxidation reactions under the combined action of air, water and microorganisms to generate strong acidic substances, and then dissolve various heavy metal ions in the ore to produce ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F17/00E21F17/103
CPCE21F17/00E21F17/103
Inventor 彭先佳胡星云
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
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