Radioactive water environment monitoring method for coal-uranium resource superposition area
A technology for environmental monitoring and radioactivity, used in radiation measurement, X/γ/cosmic radiation measurement, testing water, etc.
Pending Publication Date: 2022-03-15
核工业二〇八大队
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[0004] Based on this, it is necessary to provide a method for monitoring the radioactive water environment in coal-uranium resources superimposed areas to solve the problem that the existing monitoring methods for radioactive water environment in coal-uranium resources superimposed areas cannot quickly and effectively determine the impact of mineral development on the water environment. The method described systematically establishes a water environment monitoring system for coal-uranium resource superimposed areas, uses water level observation, on-site monitoring combined with sampling analysis, etc., and starts from the perspective of aquifer groundwater flow field and redox conditions to timely discover coal-uranium resource superimposed areas Changes in radioactive hydrochemical conditions in uranium aquifers provide early warnings of possible contamination, and are applicable to the investigation and evaluation of water environment in resource superimposed areas with "upper uranium and lower coal" stratum structures
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Embodiment 1
[0036] Taking the Zaohuogou area in the northeast of the Ordos Basin in northern my country as an example, the uranium deposits distributed in this area overlap with the mining area of the Wangjiata Coal Mine in the west of the deposit, and the overlapping area is about 20km 2 , accounting for more than 80% of the uranium deposit area. To the west of the coal-uranium resource superimposed area is the water source of Dongsheng District, Ordos City, and the coal mine dewatering outlet is located in the water source basin. Since the aquifer where the uranium mine is located covers the coal seam, it becomes the target layer of the coal mine to release water and reduce pressure. The layer of uranium is activated and migrated, and is discharged to the surface along with the drainage, causing radioactive pollution.
[0037] In view of the above situation, using the radioactive water environment monitoring method of the coal-uranium resource superposition area of the present inve...
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The invention particularly relates to a radioactive water environment monitoring method for a coal-uranium resource superposition area, which comprises the following steps of: knowing distribution rules of uranium ore aquifers and coal seams of the coal-uranium resource superposition area, and mastering water chemical characteristics and water environment background levels of different aquifers in the coal-uranium resource superposition area; arranging an underground water monitoring system capable of reflecting the water environment change of each aquifer and surface water body in the coal-uranium resource superposition area in time; selecting underground water long-term monitoring frequency, and on the basis of the long-term monitoring frequency, increasing the monitoring frequency during large-scale drainage or mining scale expansion of the coal mine; through underground water level monitoring, underground water flow field changes of different aquifers in the coal-uranium resource superposition area are mastered in time, and the influence of coal mine drainage on each aquifer is judged in time. According to the radioactive water environment monitoring method for the coal-uranium resource superposition area, changes of chemical conditions of radioactive water of a uranium ore aquifer of the coal-uranium resource superposition area can be found in time, and early warning is provided in the early stage when pollution possibly occurs.
Description
technical field [0001] The invention relates to the technical field of water environment investigation, in particular to a method for monitoring radioactive water environment in a coal-uranium resource overlapping area. Background technique [0002] Due to the similarity in the ore-forming environments of sandstone-type uranium deposits and coal mines, the uranium deposits and coal deposits produced in the northern basins of my country overlap each other in space, forming a spatial geological pattern of "upper uranium and lower coal" in some areas. In the process of coal mining, the water release and pressure reduction of the overlying aquifer will change the groundwater flow field, forming a regional groundwater table depression funnel. The formation of regional falling funnels will change the groundwater flow field and the migration conditions of uranium in sandstone uranium deposits, and may cause groundwater with high uranium concentration within the uranium deposit rang...
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Login to View More IPC IPC(8): G01N27/416G01N33/18G01T1/167
CPCG01N27/416G01N33/18G01N33/1806G01T1/167
Inventor 王文旭孟利山陈霜胡国威门宏
Owner 核工业二〇八大队