.... A detailed investigation shows that the failure of specimens depends on the property distribution within the specimens. For the specimens with random properties, the weak zones are randomly distributed and separated regardless of the size, resulting in a low average strength but failing to capture size...

.... This paper attempts to highlight the challenges in simulating faults in numerical modeling using FLAC3D software and ways to overcome these problems. A case history for a fault slip was used to assess the performance of present methods (weak zone, ubiquitous-joint, and interface) for fault modeling. Strength...

... drill holes were drilled in each orebody from the surface. Geotechnical core logging was performed using the RMR system. Weakness zones were categorized to determine what role they played in the caving process. Point load testing was conducted for a sampling interval of about 5 m and selected uniaxial...

... tunnel structural geology Upstream Oil & Gas weak zone difficult geological condition coal layer ventilation system diameter shield TBM concrete lining construction 1. INTRODUCTION Korea has tunnels of approximately 1,843km in total length that are already completed or under...