Application Research Of Integrated Geophysical Exploration And 3D Laser Technology In Visualization Of Uranium Tailings Reservoir

With the development of China's nuclear power industry,the demand for uranium mines is increasing day by day,and a large number of uranium tailings are continuously produced.The uranium tailings pond with high potential energy is a major source of danger,and there is a danger of dam failure,posing a major threat to the lives and ecological environment of downstream residents.The problem of unregulated monitoring system,weak safety foundation and unclear surface treatment and underground tailings in China is not conducive to maintaining the long-term decommissioning stability of uranium tailings ponds.In view of the problem of uranium tailings inventory in the risk of dam failure and safety management,this paper uses high-density resistivity method,ground penetrating radar method and 3D laser scanning technology to detect the burial of underground tailings in uranium tailings reservoir and the treatment of covering soil,to identify the spatial distribution of the hidden danger of leakage,and to establish a high-precision digital elevation model.The high-precision digital elevation model is combined with the results of geophysical methods to realize the spatial distribution of the underground media of the uranium tailings reservoir,and the visualization of the surface and surrounding mountains.With a large number of field and indoor research,the following primary recognition is obtained:(1)According to the high-density resistivity method,the distribution of clay,tailings and bedrock in the underground space is obtained.It is considered that the tailings settlement and overburden extrusion cause the horizontal stratification of the tailings to be poor,resulting in a weak soil covering area.Potential leak paths may be formed.(2)According to the detection results of the high-frequency antenna of the groundpenetrating radar,the stratified structure of the uranium tailings pond within 2m underground depth is divided.It is considered that the soil covering condition is good,and the covering soil is weak in a small part.(3)The 3D laser scanning data is used to acquire the point cloud of the tailings reservoir,and the 3D ground modeling of the tailings reservoir surface and surrounding mountain bodies is carried out,and the digital elevation model of the high-precision uranium tailings pond is established.The model is capable of observing and calculating the detailed topographical geometric features of the surface of the reservoir area.By combining the highdensity resistivity method to detect the results,the electrical spatial distribution of the underground medium of the uranium tailings reservoir and the visualization of the surface and surrounding mountains are realized.The research results show that the combination of high-density resistivity method,ground penetrating radar and three-dimensional laser scanning technology can realize the visualization of the detection result data based on the three-dimensional model of the uranium tailings reservoir ground.It is conducive to the interpretation of the data,and provides the basis and parameters for the stability evaluation of the uranium tailings reservoir project quality and environmental management,and provides theoretical and practical reference for the future decommissioning of the uranium tailings pond in China.