Modified FEM Algorithm with Introduced Elastic Blocks for Geomechanical Modeling of Undermined Rock Mass
M. A. Zhuravkov, M. A. Nikolaichik, N. M. Klimkovich
Belarusian State University, Minsk, Belarus
Keywords: Conjugate numerical methods, finite element method, block components, longwall mining, induced jointing domains, trough subsidence, stress-strain behavior
Abstract
The authors attempt the numerical modeling of the geomechanical behavior of a rock mass in the course of single unit face longwall mining. The calculation models are constructed for the rock mass geomechanics from ground surface down to mining depth. The model problems are solved in two and in three dimensions. The resultant characteristics of a trough subsidence on ground surface were compared with the data of engineering analysis. The modeling results are verified using actual in-situ observations of check point subsidence. The comparative analysis of the trough subsidence characteristics on ground surface from the geomechanical modeling and engineering analysis show their correlation in case of all test alternatives.
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