Water retention method of open coal mining frozen water-bearing stratum

A technology for open-pit coal mines and underground aquifers, which is applied in soil protection, surface mining, and earth-moving drilling to achieve the effects of reducing energy consumption, reliable use methods, and protecting the ecological environment.

Inactive Publication Date: 2017-05-31
CHINA UNIV OF MINING & TECH
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Problems solved by technology

[0004] The purpose of the present invention is to aim at the existing problems in the prior art, provide a kind of simple method, good isolation effect, convenient construction, ef

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  • Water retention method of open coal mining frozen water-bearing stratum
  • Water retention method of open coal mining frozen water-bearing stratum
  • Water retention method of open coal mining frozen water-bearing stratum

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Embodiment Construction

[0020] An embodiment of the present invention will be further described below in conjunction with accompanying drawing:

[0021] Such as figure 1 Shown, the water retention method of the frozen aquifer of the open-pit coal mining of the present invention may further comprise the steps:

[0022] a. Construct multiple hydrological detection boreholes downward within the coal mining area of ​​the open-pit coal mine, and judge the regional boundary of the underground aquifer distribution within the open-pit coal mine field, the buried depth of the aquifer and other parameter information according to the water inflow in the borehole;

[0023] b. Establish multiple freezing stations at the corresponding mine field boundary around the open-pit mining area to surround the open-pit mining area: the multiple freezing stations surrounding the open-pit mining area take the center of the open-pit as the origin and connect the open-pit to the mine field The distance of the boundary is a ci...

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Abstract

The invention discloses a water retention method of open coal mining frozen water-bearing stratum, which is applicable to the technical field of coal mining and environmental protection. The method includes steps of exploring distribution content of underground water-bearing stratum of a zone through hydrogeology drilling; practicing a freezing circle interception on the underground water-bearing stratum in a well field scale by an artificial cooling method, and preventing the underground water out of the well field mining scale from discharging to an open mine pit. The water retention method cannot disturb normal production activity, and can effectively prevent underground water body at periphery of the well field from discharging towards the open mine pit, maintain the underground water level at the peripheral zone, and effectively protect the ecological environment at surrounding of the mine zone; particularly, the method is applicable to the water retention and mining in the severely cold opencast working zone in the west part; the local climate condition can be fully utilized to reasonably reduce the energy consumption from practicing the embodiment; the method is economic and environment-friendly, and has very high reliability and practicability.

Description

technical field [0001] The invention relates to a water retention method, in particular to a water retention method suitable for mining frozen aquifers in open-pit coal mines in the technical field of coal mining and environmental protection. Background technique [0002] Most of the west of my country is arid and semi-arid water-scarce areas, with an average annual precipitation of less than 400mm, but evaporation reaches about 2500mm. In recent years, with the continuous increase of coal mining intensity in this area, the water environment and ecological system in this area have been seriously damaged. Especially in open-pit coal mining areas, the stripping of the overlying stratum of the coal seam leads to the direct truncation of the underground aquifer, causing a large amount of groundwater to drain out, resulting in a drop in the groundwater level around the mining area, the death of natural vegetation, and desertification of the land. cause serious impact. Therefore...

Claims

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Application Information

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IPC IPC(8): E02D3/115E21C41/28
CPCE02D3/115E21C41/28
Inventor 鞠金峰许家林
Owner CHINA UNIV OF MINING & TECH
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