MINE SURVEYING OF LARGE OBJECTS AND SUBSIDENCE IN EXPLOITATION AREA OF VELENJE COAL MINE
1. Drago Potočnik, Premogovnik Velenje d.d., Slovenia 2. Aleš Lamot, Premogovnik Velenje d.d., Slovenia 3. Janez Rošer, Premogovnik Velenje d.d., Slovenia 4. Milivoj Vulić, University of Ljubljana, Faculty of Natural Science and Engineering, Slovenia
With underground longwall mining method Velenje Coal Mine is causing subsidence of the surface above mine pits. The influence area of mining in the exploitation area of Velenje Coal Mine is subject to constant changes of the surface. The size and the location of the mine influence on surface area is changing according to the location and the size of the mining panels. Surface movements and deformations are observed on over 300 measurement points in mining area and its vicinity using mine surveying monitoring system including tachymetry, geometrical levelling, GNSS, TLS and aerial photogrammetry. The Velenje Coal Mine’s mine surveying monitoring system is complex and can be classified as an extended geodetic monitoring system. The extended geodetic monitoring system is constantly upgraded with new measurements and the latest measuring equipment.
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