Geomechanical Risk Assessment For Rock Mass Subjected To Mining, Using Strength Theories Based On True 3D Triaxial Compression Laboratory Tests

摘要

The comparative study of the Mogi's strength theory based on so called "true" 3D triaxial compression laboratory tests and the classic Coulomb-Mohr hypothesis based on triaxial tests performed in the Karman's axially symmetric conditions, has been presented in the paper.Using the appropriate 3D geomechanical model (FEM), which comprised selected areas in one of Polish copper mines where roof instability has actually occurred, spatial distribution of safety margins values within rock mass during the mining were effectively investigated using the both mentioned above strength hypotheses. Their practical appropriateness in mining practice have been proved using an example of severe seismic event occurred in the Rudna copper mine in 2005.