Investigation And Restoration Of Geological Environmental Problems In Taojingou Tin Mine In Yunnan

Yunnan is a paradise for non-ferrous metals,especially in the southwest.The Taojingou tin mine is located in the Lailishan tin deposit area at the junction of Tengchong and Lianghe counties in southwestern Yunnan.It is a typical Lailishan tin mining area.The geomorphology belongs to the vertical ridge-valley area.Due to years of private excavation and indiscriminate mining,it has caused serious damage to the geological environment of Lailishan.Therefore,the research on the restoration and governance of the geological environment of the Taojinggou tin mine is particularly important,which can play a demonstrative role in the restoration and governance of the abandoned mine environment.Based on the research and application of the rapid geological environment survey and evaluation method of the Taojingou Tin Mine,the paper uses drones to carry out the actual surveying and mapping of the surface topography and geomorphology,and the geological environment investigators use the surveying and mapping results to verify the on-site geological environment and map the divisions.Geological surveying and mapping of the geological environment characteristics of different blocks can quickly form evaluation results.Through the investigation,there are mainly 2 landslides and 1 debris flow hidden danger point in geological disasters;26 soil samples were collected in the abandoned mine utilization site,and the pH value and 6 kinds of heavy metal elements in the soil(Cu,Zn,Pb,Cr,Cd,Mn)source distribution and pollution were analyzed and evaluated.The source and distribution characteristics of heavy metal elements were determined through statistical analysis,correlation analysis,factor analysis and spatial characteristic analysis of heavy metals;the geoaccumulation index method and the potential ecological hazard index method were used to analyze The heavy metal pollution was evaluated;at the same time,5 water samples were collected on the site for water quality analysis,and the Nemerow index method was used to evaluate the regional surface water.The results showed that the water quality of the waste site area was extremely poor.The paper analyzes the waste characteristics and zoning of different blocks of the abandoned site of Taojingou Tin Mine,and explains the source of pollutants in the mine land and the quantitative analysis of pollution sources through the comparison of the original topography and the current topography.Use elemental analysis technology to analyze the content of main heavy metals in different minerals and rocks.The amount of pollutant sources is calculated by software simulation technology division.The paper puts forward suggestions for the treatment of the abandoned site of Taojingou Tin Mine,and after the implementation of the design and construction unit,through its treatment effect,summarizes the ecological environment restoration treatment plan of the abandoned metal mining site in the Longitudinal Ridge and Valley District,using the above-ground and underground three-dimensional block plan.The prevention and control of geological disasters and soil erosion are realized through the self-adaptive dam-wall integrated technology,and the underground transmission channel of heavy metals is blocked at the same time.Using a combination of engineering and chemical treatment methods to propose measures against geological disasters and pollution,create basic conditions for plants to grow,and prevent the occurrence of geological disasters,and ultimately improve the geological environmental problems of mines,reduce geological disasters,and repair soil,Improve water quality,restore ecological balance,and ensure the improvement of geological and environmental problems in mining areas.