Investigation And Evaluation Of Geological Environment And Ecological Restoration Scheme Of Maqu Dahui Gold Deposit In Gannan

With the development of society,people's demand for mineral resources is increasing day by day.The waste slag formed after mining has brought a series of ecological and environmental problems such as water pollution,geological hazards,soil erosion and land resource waste,etc.,with prominent environmental risks and hidden dangers.This paper takes dashui gold deposit in Maqu County,Gannan as the research object.Through data collection and on-site exploration,investigation and study of the ecological environment problems faced by the mining area,four main influencing factors are selected for ecological environment assessment,and specific prevention and control measures are proposed.The research results are as follows:(1)The mining area ecological environment in the process of exploration and research,damage and impact caused by mining is the mining road,tailings,open-air mining pit mining damage of land resources,slag heap,tailings and waste rock,mineral processing field of pressure of destruction of land resources,mineral sheers damaged land area of 103.505 hm2,including land to mining area of 19.938 hm2,total area of 83.567 hm2,damaged land types are mainly natural grassland and mining land,area of 49.945 hm2,53.56 hm2,determine the mining activities on the destruction of land resources influence degree is serious;Mining in the near and long term has less influence on the geological environment of the mine,and the surface collapse scale is medium.Mining activities have less influence on groundwater aquifer and have less influence on the geological environment of the mine.The geological hazards in the study area mainly include debris flow,and debris flow gully in the area belongs to small debris flow with low risk.(2)In view of the research conclusion analysis,mining area geological environment restoration governance according to the principle of “governance is given priority to,prevention and treatment of combining”,the slag heap,tailings and mining road,open-air mining pit,slag waste rock field taken level off,cover earth greening,backfill mining pit,road level off,build retaining wall,such as the specific countermeasures,restoration of underground aquifer emphasizes the principle of water ecological repair themselves,and the thin line of water plugging prevention measures in mining process,and two for the area mud-rock flow channel design jetty,reduce the occurrence of geological hazards,make the waters gold mine and the surrounding environment harmonious coexistence,realize the harmonious development of geological environmental protection and resource development goals.By means of combining engineering measures with biological measures,it has practical guiding significance and comprehensive utilization value for realizing ecological reconstruction in mining areas,coordinating to promote mineral resources development and ecological environment protection,maintaining the stability of regional ecosystem,and realizing sustainable economic development.