Research On Caocun Abandoned Mine Prevention And Control Design

With the rapid development of society and economy,the urban and rural construction is knowing an unprecedented ascension.On this basis,the exploitation of mineral resources is particularly important.Representing a powerful driving force of China’s economic construction,the exploitation of mineral resources provides a large number of material and energy bases.However,a large number of mining operations have led to a series of environmental problems,such land resources damage,water environment disturbance,mine secondary disasters,landscape and ecological damage,etc.Moreover,a large number of non-standard mining operations in the early period led to permanent damage to the mine ecological environment;under the background of economic construction,the mineral resources development process cannot be stopped,so the sustainable development of mines in China is of major importance.Although mine ecological restoration is also going through a fast development,however there are still some limitations in the theories and technologies of mine ecological restoration currently used.In particular,more traditional methods are still adopted in the real-time survey of mine site topography and landform.So,in this study,With Caocun abandoned mine taken as the object of research,the tilt photogrammetry technology of uav is introduced as an adequate technology to make up for the inadequacy of exploration and mining terrain data processing.Firstly,the concept of mine ecological remediation is defined,and the existing problems and future development trends in the field of mine ecological remediation are discussed.At the same time,the process and principle of uav tilt photogrammetry to generate real three-dimensional space model are explained,and its application field and development potentials are also put into evidence.Moreover,we introduce a new method of automatic identification and characterization of discontinuities in rock masses from 3D points clouds based on 4 steps:(1)normal vector calculation using the iterative reweighted plane fitting(IRPF)method,(2)discontinuity sets clustering by fast search and find of density peaks(CFSFDP)algorithm,and Fisher’s K value iterative calculation to eliminate noise points,(3)discontinuity segmentation using densityratio based method,and discontinuity plane fitting using the random sample consensus(RANSAC)algorithm,(4)persistence and spacing calculation using the theory of analytic geometry.Finally,a design method of mine ecological restoration is proposed,and the study concludes with the advantages of uav tilt photogrammetry and the new method of automatic identification and characterization of discontinuities in rock masses from 3D points clouds,over traditional survey methods,namely more flexibility,efficiency,and reduction the cost and time consumption of the survey and prevention design process.