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In the case of this thick and gentle coal seam no.3 of the Jiu Valley coal basin (Romania), the mining methods are by use of the longwall mining technologies with roof control by caving or top coal caving. In this paper, it is presented the analysis of the complex deformations of ground surface, over time, as a consequence of the coal mining in certain mining fields of the basin. Also, it is analysed the ground surface subsidence phenomenon using the CESAR-LCPC finite element code. The modelling is made in the ela...

In this study, the geotechnical properties of the 2nd Organized Industrial Region clays were investigated and the settlement analysis was made with Plaxis software. First of all, the geotechnical properties of the disturbed and undisturbed specimens taken from the 2nd Organized Industrial Region and its surroundings were determined with laboratory and field (SPT) tests accordi ng to criterion defined in TS 1900. For this purpose, there were drilled 18 bore wells with 40 m depth. The para meters that would be used ...