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Hard rock type uranium mine soil pollution information hyperspectral extraction method

A technology of soil pollution and extraction method, which is applied in the direction of color/spectral characteristic measurement, measuring device, scattering characteristic measurement, etc., which can solve problems such as low timeliness, limited inversion accuracy of heavy metal content, and heavy workload

Active Publication Date: 2021-04-20
BEIJING RES INST OF URANIUM GEOLOGY
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Problems solved by technology

The limitation of this type of method is that the workload is large and the timeliness is low. With the popularization of hyperspectral technology, some researchers have begun to use hyperspectral to invert the content of heavy metals in soil to take advantage of hyperspectral timeliness and non-destructive effects. However, due to the complex soil composition, the spectral characteristics of heavy metals are suppressed by the information of various components, which limits the inversion accuracy of heavy metal content

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  • Hard rock type uranium mine soil pollution information hyperspectral extraction method
  • Hard rock type uranium mine soil pollution information hyperspectral extraction method
  • Hard rock type uranium mine soil pollution information hyperspectral extraction method

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Embodiment Construction

[0038] The present invention will be further described below through specific embodiments.

[0039] Step 1: Uranium mine soil sample collection and spectral measurement

[0040] Soil samples were collected in the uranium mine survey area, and the collection density was controlled at 4 points / Km 2 , using the ASD surface object spectrometer to simultaneously measure the soil spectral reflectance at the sampling point. According to the requirements of the survey scale, the soil spectral reflectance was measured outside the sampling points according to a certain grid.

[0041] In this example, the density of sampling points for collecting soil samples in a volcanic rock uranium mining area in the south is 4 points / Km 2 , using the ASD surface object spectrometer to simultaneously measure the soil spectral reflectance at the sampling point. The spectral measurement of the whole area is carried out according to the scale of 1:50000, and the spectral reflectance measurement of th...

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Abstract

The invention belongs to a geological mine analysis technology, and particularly relates to a hard rock type uranium mine soil pollution information hyperspectral extraction method which comprises the following steps: collecting a uranium mine soil sample, measuring spectral reflectance, measuring contents of soil heavy metal elements in different forms, and determining hyperspectral characteristic wave bands in various forms; and establishing a hyperspectral inversion model of the content of each form of the element, and evaluating uranium mine soil heavy metal pollution space distribution. According to the method, the spectral characteristics of the heavy metal elements can be enhanced, so that the hyperspectral inversion precision is improved, and more accurate data support is provided for hard rock type uranium mine soil heavy metal monitoring.

Description

technical field [0001] The invention belongs to geological and mineral analysis technology, in particular to a hyperspectral extraction method for soil pollution information of hard rock type uranium mines. Background technique [0002] Since the 1950s and 1960s, the types of uranium mines mined in my country are mainly hard rock uranium mines such as granite, volcanic rock, and carbon-silica mudstone. These uranium mines are caused by factors such as small scale, complex ore body shape, and uneven mineralization. The amount of mine development is large, the mining dilution rate is high, and the "three wastes" (waste gas, waste water, and waste residue) are produced at a high rate, which poses a strong threat to the soil around the mining area. [0003] In the monitoring of heavy metals in the soil of hard rock uranium mines, the traditional method is to collect soil samples on site according to a certain grid, and then analyze the content of uranium and other heavy metal ele...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/25G01N21/55G01N27/62
Inventor 赵宁博秦凯杨越超崔鑫
Owner BEIJING RES INST OF URANIUM GEOLOGY
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