| Land reclamation can solve the problems and environmental problems caused by human activities,restore land use value,protect the environment.Guilin is an internationally famous tourist city,there are a large number of quarries on the banks of the LI RIVER,quarries destroy landscapes and ecosystems.The government shut down these quarries as planned,and has launched a programme of land reclamation on quarries.These quarries are limestone mines,their mining method is open-pit mining,they are small scale mine,and their position is scatted.During mining,people did not mine as planned.Some commonly used techniques are not suitable for such projects,like traditional measurement techniques,traditional aerial photogrammetry and satellite remote sensing.In this paper,the limestone ore of Anmian quarry in Luojin Town,Yongfu County,Guilin City was selected as the study area to study the aerial photography measurement technology of drones.The Anmian quarry is peak cluster Valley landform subregion in the eroded erosion geomorphology area.It has less geological hazards,and a small open pit.The stability of the existing slope is relatively poor,which is in line with the typical characteristics of the mines surrounding Guilin.The main research results of this article are as follows:(1)The method of drone low-altitude aerial photogrammetry route planning and image control point arrangement was studied.The UAV P540V drone equipped with a Sony A6000digital camera was used to complete the drone aerial photography work.The image data of the study area was 13.7353 ha.(2)Using Pix4D Mapper software to process the acquired UAV image,the three-dimensional point cloud model of the study area was obtained through automatic air-to-space encryption,and the DSM and digital orthophoto map of the study area were created based on the optimization of the image control point-to-point model.Measuring the area of land damage in the study area is 134264.44m~2.Drawing on the status quo map of land use and analysising slope.(3)In order to UAV image processing results based on the study area status quo assess and prediction assessment.Determine the study area Geological environmental impact assessment level 2 level,mine is now Geological environmental impact serious area.Mine Geological disaster medium development,mining the aquifer,geology remains and Humanities landscape influence and destroy a lesser extent,the land resources influence and damage more serious,the topography landscape influence and severely damaged.Prediction may occur collapse,landslides and Karst ground collapse and other Geological disaster.(4)Combining UAV image data and assessment of the research area,the mine geological environment is protected and restored,and the mine's ecological environment is restored through leveling of the site,construction of earth retaining rafts,earth cover and biological measures,and irrigation and grass cultivation are used to mine reclamation.The area of the restoration of green space is 107567m~2.(5)Through the application of drone technology to mine rehabilitation,it has been proved that the data obtained by UAV technology is comprehensive,time-efficient,and simple to use.UAV technology is used for the advantages of small amount of land reclamation in the mine and high safety.The application of drone aerial photogrammetry technology to mine reclamation planning and design can fully reflect the characteristics of light and small airborne photogrammetry technology,long life time,low cost,and flexibility,improving land reclamation design efficiency and increasing convenience.It is of great significance to the development of mine rehabilitation. |
PDF Full Text Request