Study Of Photographs Monitoring Analysis System For Slope Stability

With the further exploitation of mining resource,more and more open pits are coming into deep mining stage and more artificial high slope is forming,which increase the dangerous and hidden trouble of landslide and threaten the safe product and technology and economic benefit,so it is important to monitor the deformation of high slope and analyze its stability.The deformation monitoring focus on the deformation of points in tradition,the paper realize the deformation monitoring basing on the plane by employing the method of multi-baseline digital close-range photogrammetry.Visual program for slope stability analysis is compiled in paper and the system of deformation monitoring and stability analysis is used in a open pit mine. The main work of paper is as follows:1 The current study of slope deformation monitoring and stability analysis is intorduced in detail.The function of the multi-baseline digital close-range photogrammetry software is introduced and the differences between the software and other close-range photogrammetry software are compared.2 The feasibility of software for slope deformation monitoring is validated by simulation test and the influence of intersection angle and distance of photography on the precision of software is studied.The results show that the precision of software is related to the camera pels,focus,and distance of photography,intersection angle,the precision of electronic tachometer and the survey method.The bigger the intersection angle is,the higher the precision in X and Y direction is,the change of intersection angle has little influence on the precision in Z direction.The plane error and deepness error decrease with the increase of intersection angle.The precision in X,Y,Z direction and relative precision increase with the increase of baseline distance,the relative precision of software is high,its error increase with distance of photography increase as a whole,but the precision of far distance may be higher than the precision of relative near distance by using different camera lens.3 Basing on limit equilibrium and rock falling mechanics theory,the software of stability analysis is compiled,the software includes some common limit equilibrium methods such as Fellenius method,Bishop method,Janbu method,Sarma method and tridimentional wedge method and collapse evaluation method.The software operation technological process is introduced by taking some open pit mine refuse dump stabilities analysis as example.The reliability of software is validated by comparing the results of Geo-studio software,which is large scale slope stability analysis software.4 The system of multi-baseline close-range photogrammetry deformation monitoring and stability analysis is used in some open pit slopes,dump and tailing dam.Comparing the deformation monitoring results of software and electronic tachometer,it shows that results of two method are consistent.Basing on different geology,multi-work condition analysis of open pit slope,dump and tailing dam is studied by employing software.The results show that the monitoring system based on the multi-baseline digital close-range photogrammetry is feasible.It used for slope monitoring,such as the open pit slope,the dump,the tailing dam,and so on,and also achieve the point and surface deformation monitory of slope.The research results obtained in this paper provide a scientific basis for mine safety production and the slope design,and have a certain theoretical and practical significance.