Počet záznamů: 1
Assessment of models to predict surface subsidence in the Czech part of the Upper Silesian Coal Basin - Case study
- 1.0535483 - ÚGN 2021 RIV CZ eng J - Článek v odborném periodiku
Jiránková, Eva - Waclawik, Petr - Němčík, J.
Assessment of models to predict surface subsidence in the Czech part of the Upper Silesian Coal Basin - Case study.
Acta geodynamica et geomaterialia. Roč. 17, č. 4 (2020), s. 469-484. ISSN 1214-9705. E-ISSN 2336-4351
Institucionální podpora: RVO:68145535
Klíčová slova: longwall mining * surface subsidence * great depth * finite element method * Knothe method
Obor OECD: Mining and mineral processing
Impakt faktor: 1.176, rok: 2020
Způsob publikování: Open access
https://www.irsm.cas.cz/materialy/acta_content/2020_doi/Jirankova_AGG_2020_0034.pdf
This case study presents the verification of two surface subsidence prediction models for longwallmining at depths greater than 400 m. The surface subsidence points were surveyed and comparedfor both models. The first model uses empirical calculations to predict the surface subsidence. This method is reliable for predicting surface subsidence at shallower depths. At present, however, coalmining has progressed to great depths. The second model is the 2-dimensional finite elementmethod to predict surface subsidence. In contrast to the first method, this method is based on the regional parameters and uses the rock mass properties to evaluate surface subsidence for multi-seams at any depth. Results show that the finite element method gives a better approximation ofthe measured surface subsidence than the Knothe method. The maximum surface subsidence,which was determined by the FEM method, was used to adjust the extraction coefficient in theKnothe's method. The predicted value differs from the measured value by 8 %. The slope ofthe predicted subsidence trough was within the range of 2‒8 % from the surveyed subsidence. This case study proposes a procedure for using both models to successfully predict the surface subsidence.
Trvalý link: http://hdl.handle.net/11104/0313494
Název souboru Staženo Velikost Komentář Verze Přístup UGN_0535483.pdf 2 5.1 MB Vydavatelský postprint vyžádat
Počet záznamů: 1