PROGNOZA ODVALA U TUNELIMA PREMA GEOLOSKI DEFINIRANIM RAVNINAMA DISKONTINUITETA

• Published in: Rudarsko-geološko-naftni zbornik 1994-12, Vol.6 (1), p.61-61
• Main Authors: Hudec, Mladen, Frgic, Lidija
• Format: Article
• Language: hrv ; eng
• Subjects: Blocking; Building foundations; Criteria; Dipping; Failure; Geological engineering; Mathematical analysis; Planes; Rock; Siding; Structural engineering; Tunnels; Underground construction
• ISSN: 0353-4529; 1849-0409

The data from the engineering geological measurements have to be adequate prepared for later use in the computer programs for examination of the underground rooms stability. The only mean values of the dip direction and dip angles are not relevant for later calculations, but rather the statistically defined area containing chosen percentage of the collected data. The main conclusions of the block theory are accepted for visual presentation of the relation between the rooms cross-sections and the planes of discontinuities so that the position and shape of critical (key) blocks can be easy recognized. The roof falls and side sidings volumes have to be filled in the site with the expensive concrete, so the avoiding of falls is a challenge to the theory and tunnelling practice. The program based on the boundary elements is adapted so that it can calculate the failure criteria on the planes of weakness and compare this with the failure criteria through in the rock itself. The area with critical security factor will be displayed and so the numerically possible rock and block failure recognized.