Zoran Gojkovic

University of Belgrade · Chair of Mine Surveying

Open pit coal mining affects surrounding populated areas, resulting in terrain surface deformation. Surface deformation should be monitored as often as possible to control deformations and prevent potential incidents. This paper analyzes time series deformation estimated from the Sentinel-1 satellite images using the Persistent Scatterer Interferom...

The Grey Model (GM) is a powerful tool in the Grey System Theory for estimating the behavior of partially unknown systems or systems with limited information. In the Grey System Theory, GM(1,1) is the most widely used model for prediction. The applicability of this model for the purpose of buildings deformation forecasting in a vertical plane was t...

This paper presents the process of making the 3D model of terrain, digital elevation model and orthophoto at the location of the "Crveni Breg" mine. The necessary photos were taken with a 20-megapixel digital camera attached on the DJI Phantom 4 Pro photography UAV. AgiSoft PhotoScan was used to create the 3D model of terrain. A spatial visualizati...

Meeting investment and operating goals with presence of different sources of uncertainties and operational constraints is critical for a successful underground mining operation and even for a mining company to survive. Small and large mining businesses are all affected by business environment. Production planning that takes into account real streng...

The physical surface of the earth has irregular shape which is not mathematically defined, therefore the shape of the Earth is approximated with mathematically defined surfaces such as ellipsoid and sphere. The developing of a global positioning systems, thus and modern navigation systems, as effect produce large amounts of data which contain the p...

Transformation between ellipsoids also called datum transformation implies coordinate conversion from one ellipsoid to another ellipsoid, most frequently to be done by Helmert seven-parameter transformation. Transformation parameters involve three rotation, three translation and scale factor and they can be calculated using reference points which a...

The Danish astronomer Peter Andreas Hansen, who also worked on theoretical geodesy, provided an original solution for solving the geodetic quadrilateral in which the four angles and the length of one side are known. This procedure, identified in scientific literature as Hansen's problem, has been applied in geodesy but significantly more so when so...

The development of the crosscut from the aspect of mine surveying is a specific task, since there is no possibility for an independent control of its construction during the development. This is primarily related to the long crosscuts where the deviations of the designed direction of crosscut would have significant consequences on safety and techno...