Optimization and recombination method for well network of in-situ leaching uranium mining

A technology of in-situ leaching for uranium mining and well pattern, which is applied in the direction of mining fluid, earthwork drilling, wellbore/well components, etc., and can solve problems such as the impact of uranium resource leaching rate

Active Publication Date: 2017-07-07
BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, even the flow field of the seven-point well pattern layout will have stagn...

Method used

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  • Optimization and recombination method for well network of in-situ leaching uranium mining
  • Optimization and recombination method for well network of in-situ leaching uranium mining
  • Optimization and recombination method for well network of in-situ leaching uranium mining

Examples

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Effect test

Embodiment 1

[0028] In the method for optimizing and reorganizing in-situ leaching uranium well pattern according to the present invention, when the uranium concentration of the leaching liquid of the leaching unit in the well site mining area is 6-10 mg / L, the position of the pumping liquid well is adjusted; the boundary of the mining area is the injection liquid If the well is not adjusted to be an extraction well, it is ensured that all the periphery of the mining area are injection wells;

[0029] like figure 1 When the well type shown is five-point type, the adjacent extraction wells are connected in a straight line, and the adjacent injection wells are connected in a straight line, the original extraction well is changed to an injection well, and the original injection well is changed to an extraction well, and the adjusted well type is not yet five-point type, such as figure 2 shown.

[0030] The size of the extraction well is 148×10mm, and the size of the injection well is 148×1...

Embodiment 2

[0035] In the method for optimizing and reorganizing in-situ leaching uranium well pattern according to the present invention, when the uranium concentration of the leaching liquid of the leaching unit in the well site mining area is 6-10 mg / L, the position of the pumping liquid well is adjusted; the boundary of the mining area is the injection liquid If the well is not adjusted to be an extraction well, it is ensured that all the periphery of the mining area are injection wells;

[0036] like image 3 As shown, when the well type is a seven-point type, the extraction wells are connected by a line, and two injection wells are spaced between every two extraction wells, and they are translated in the same direction along the straight line. The injection well is changed to the extraction well, and the adjusted well type is still the seven-point type; Figure 4 shown.

[0037] The size of the extraction well is 148×10mm, and the size of the injection well is 148×10mm.

[0038] ...

Embodiment 3

[0042] In the method for optimizing and reorganizing in-situ leaching uranium well pattern according to the present invention, when the uranium concentration of the leaching liquid of the leaching unit in the well site mining area is 6-10 mg / L, the position of the pumping liquid well is adjusted; the boundary of the mining area is the injection liquid If the well is not adjusted to be an extraction well, it is ensured that all the periphery of the mining area are injection wells;

[0043] like Figure 5 As shown, when the well type is determinant type I, the extraction wells are connected, the injection wells are connected, the extraction wells are translated in the same direction to the adjacent injection wells, the original extraction wells are changed to injection wells, and the original translation wells are changed to injection wells. Change the original injection well to the extraction well, and ensure that the adjusted well type is still the determinant type I, such as ...

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Abstract

The invention provides an optimization and recombination method for a well network of in-situ leaching uranium mining. The method comprises the steps that when the uranium concentration of leachate of a certain leaching mining units of a well site mining area is 3-10 mg/L, or the leaching rate reaches 60%-75%, the positions of liquid extracting wells and liquid injecting wells are adjusted; the injecting wells at the boundary of the mining area are not adjusted to be extracting wells, and it is guaranteed that wells on the periphery of the mining area are all the injecting wells; when a well type is a quincunx type, the adjacent extracting wells are connected into straight lines, the adjacent injecting wells are connected into straight lines, the original extracting wells are changed into injecting wells, the original injecting wells are changed into extracting wells, and it is guaranteed that the well type after adjusting is still the quincunx type; and when the well type is a seven-point type, the extracting wells are connected into lines, the two injecting wells are located between every two extracting wells, translation is conducted in the same direction of the straight lines, after translation, the original extraction wells are changed into injecting wells, the adjacent injecting wells along the straight lines are changed into extracting wells, and it is guaranteed that the well type after adjusting is still the seven-point type. The optimization and recombination method is a secondary stoping method improving the leaching rate of the uranium resource and solves the problem that through a fixed well type, leaching dead angels exist at the time of leaching, so that the resource leaching rate is low.

Description

technical field [0001] The invention belongs to a leaching process of uranium, relates to a secondary recovery method for improving the leaching rate of uranium resources in the field of in-situ leaching and mining uranium, and particularly relates to a method for optimizing and reorganizing in-situ leaching and mining uranium well patterns. Background technique [0002] In-situ leaching uranium mining is only carried out in sandstone-type uranium deposits, and the deposit must be located below the groundwater level. The hydraulic gradient formed by drilling and pumping in the in-situ leaching uranium mining well site drives the leaching agent to flow from the injection well to the extraction well, and occurs with the ore. Chemical reaction, uranium-containing solution migrates with groundwater. The flow speed and direction of the leaching agent change with different positions in the well site, and it is divided into leaching area and retention area; in the leaching area, th...

Claims

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Application Information

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IPC IPC(8): E21B43/30
CPCE21B43/30
Inventor 苏学斌李喜龙刘乃忠张勇汤庆四高险峰董惠琦曹俊鹏史唯剑闫纪帆
Owner BEIJING RESEARCH INSTITUTE OF CHEMICAL ENGINEERING AND METALLURGY
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