Evaluation of terrain subsidence in relation to the engineering-geological zones in a territory of the Ostrava-Karvina District affected by mining

The study deals with the evaluation of terrain subsidence caused by mining activities in the selected time chronology, in relation to the existing built-up area and planned built-up area according to the land-use plan. The evaluation was also related to the engineering-geological zones, such as the representatives of localities with similar geological structure in connection with the foundation engineering. All the mentioned information should become an integral part of land-use planning and vital information for building offi ces and future engineering-geological and geotechnical surveys. A tool that would permit a mutual comparison of such information was the Geographic Information Systems by means of overlay analyses. However, before that it was necessary to vectorize all the required information on the basis of earlier registered map documentation and aerial photos using the absolute methods, or relative positions. All this was complemented by fi eld and archive study of selected sites where information had to be updated or verifi ed on the grounds of previous circumstantial evidence with ambiguous identifi cation of particular parameters. The case study was implemented in the cadastral district of the town of Orlova (partly of D tmarovice, Doubrava, Rychvald and Karvina), which is in terms of mining activities located in the Karvina section of the Ostrava-Karvina District, where black coal is extracted in Karvina Mine, which was established having merged the former SA Mine and Lazy Mine as of 1 April 2008. The Plant SA is situated in two allotments of Doubrava and Karvina