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Method for preventing decline of underground water level in uranium mining through in-situ leaching

A groundwater level and groundwater technology, applied in ground mining, earth square drilling, underground mining, etc., can solve problems such as groundwater level decline, achieve the effect of ensuring recovery and improving the economic benefits of enterprises

Active Publication Date: 2016-03-02
THE FOURTH INST OF NUCLEAR ENG OF CNNC
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method for preventing the groundwater level from falling in the mining of uranium mines by in-situ leaching, aiming at the problem that uranium ore mining by in-situ leaching will cause the groundwater level to drop during the co-mining of uranium and coal.

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  • Method for preventing decline of underground water level in uranium mining through in-situ leaching

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Embodiment Construction

[0030] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0031] This embodiment provides a method for co-mining uranium and coal to prevent the groundwater level of uranium mines being mined by in-situ leaching, which includes the following steps in turn:

[0032] Step 1. Determine the spatial position relationship of uranium and coal in the mining area

[0033] According to geological methods, determine the spatial position relationship between uranium and coal seams in the uranium-coal symbiotic mining area 3 and the hydrogeological conditions of the mining area, including the permeability coefficient and groundwater level of the ore-bearing aquifer; figure 1 As shown, in the mining area 1 of this embodiment, the uranium ore seam in the uranium-coal symbiotic mining area 3 is located on the upper part of the coal seam, and the coal mining area 2 is around the uranium-coal symbiotic mining area 3 . Since th...

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Abstract

The invention belongs to the technical field of uranium-coal paragenesis mining, and particularly relates to a method for preventing a decline of an underground water level in uranium mining through in-situ leaching for uranium-coal co-mining. According to the technical scheme, a hydraulic barrier is built on the periphery of a uranium mining district through distribution of water injection drill holes, and when underground water is drained for a coal mine, the decline of the underground water level of the uranium mining district is prevented. The method for preventing the decline of the underground water level in uranium mining through in-situ leaching has the advantages that it can be guaranteed that two resources are mined at non-overlapped districts at the same time, the two resources can be fully utilized, the economic benefit of enterprises is improved, and the recovery of the geological resource is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of uranium-coal co-existence mine mining, and in particular relates to a method for co-mining uranium and coal to prevent groundwater level drop during uranium mining in an in-ground leaching mode. Background technique [0002] When using in-situ leaching method to mine uranium, it is necessary to maintain a certain pressure water level to make the in-situ leaching mining go smoothly. When the pressure water level drops to a certain level, the in-situ leaching mining method will not be able to proceed, and the uranium ore will become a Unexploitable dull mines, resulting in the loss of national strategic resources. In the process of coal mining, a large amount of groundwater needs to be discharged, and the confined water level should be reduced to below the safe water pressure required for coal mining as much as possible to ensure safe production of coal mines. In uranium-coal symbiotic deposits, especially...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21C41/22E21C41/18
CPCE21C41/18E21C41/22
Inventor 雷明信徐强查恩爽肖诗伟
Owner THE FOURTH INST OF NUCLEAR ENG OF CNNC
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