Research On Land Ecological Restoration Based On Mine Environmental Assessment

The mining and processing of mineral resources have made tremendous contributions to social progress and economic development.However,while human mining activities bring tremendous benefits,they often cause damage to nature and cause problems such as different types of geological disasters,destruction and occupation of land resources,destruction of topography and landscape,and environmental pollution.Fusui County,Guangxi is located at the southern edge of the western section of the Nanling tectonic belt,and at the southwestern end of the second subsidence belt of the New Cathaysia,with a high proportion of karst strata.The county’s geological environment is complex and sensitive,and belongs to the ecologically fragile area.Through carrying out mine environmental assessment and land ecological restoration research in Fusui County,the aim is to reveal the law of the impact of human mining activities on the mine environment in the county,clarify the direction of land ecological restoration in the mining area,and enrich the relevant mine environmental research and ecological environment in southwestern China.The case of land ecological restoration.Based on field surveys and remote sensing image analysis,six factors with important influence on the mine environment were selected,and the method of fuzzy evidence right was used to evaluate the mine environment in Fusui County,and the land resource damage was calculated for the mining areas with bad mine environment.Happening.Based on the existing ecological restoration technology of the mining area,the corresponding management measures are proposed,and the following conclusions are mainly obtained:(1)Mining activities in Fusui County are mainly distributed in coal mines,limestone for building stones,individual lead-zinc mines and individual barite mines.Studies have found areas with larger terrain slopes,areas with less vegetation coverage,and landform types The areas that belong to the karst slope,the areas where the stratigraphic lithology belongs to carboniferous,and the areas where the fault buffer zone is within 500 meters are all geological hazards prone to form.(2)With the help of fuzzy evidence weight model,the analysis found that the mining environment problems in the study area are highly correlated with the distribution of mining activities and vegetation coverage,while the geomorphic evidence layer and geological structure evidence layer are related to the mine environment in Fusui County.The situation has not formed obvious regularity.Through evaluation of the mine environment in Fusui County,it is concludedthat the areas with poor mine environment are mainly distributed linearly in the northeast,southwest and central parts of Fusui County along the northeast to southwest direction.(3)According to statistical analysis,the damage to the land resources of the mine in Fusui County is mainly due to the digging damage of the open pit and the occupation of the industrial site.Some mines also have the behavior of occupying the land with waste rock and waste materials.The resources are collapsed and damaged.As of July 2019 in Fusui County,41hm2 of cultivated land was damaged,21.96hm2 of forest land was damaged,and 101.59hm2 of other land was damaged due to mining activities.A total of 164.53hm2 of land resources was damaged.There are 36 mining areas with a damaged area of land resources in the range of 5hm2,8 mining areas with a damaged area of land resources between 5hm2-10hm2,and 4 mining areas with a damaged area of land resources above 10hm2.(4)According to the results of mine environmental assessment and the destruction of land resources,10 land ecological restoration areas are divided according to the rules of centralized contiguous patch.By analyzing the pollution and damage of mines in the remediation area and the size of the average remediation area of the mine area,four key ecological restoration areas and six general ecological restoration areas are divided.