Strength simulation of rock with existing cracks under static loadings

• Main Author: Chea, Bunly.
• Other Authors: Zhao Zhiye
• Format: Final Year Project
• Language: English
• Published: 2009
• Subjects: DRNTU::Engineering::Civil engineering::Geotechnical
• Online Access: http://hdl.handle.net/10356/15828
• Institution: Nanyang Technological University

This report presents a model for the strength simulation of rock for static loading condition. The random cracks have been assigned within the rock sample and the crack percentages are laid between zero percent to five percents. The simulation of the rock sample with pre-existing microcracks is observed in action of applied compression force. The basic analysis is based on the results obtain from DDA (Discontinuous Deformation Analysis Simulations. The initial joints properties are uniform, but due to pre-existing microcracks, certain joints property possesses low value that indicates the location of weak joints. The pre-existing cracks are oriented in such a way that the sample is assumed to have experienced discontinuity and the deformation of rock is the important feature in the simulation. The results of the simulation together with the behavior of rock strength are the main purposes in this study and will be discussed in aids of illustration. This study is more on qualitative rather than quantitative because it describes behavioral characteristic of rock rather than numerical value alone. The analysis values have shown that the inhomogeneity in the rock samples, namely, the numbers of cracks in original rock samples have affected the rock strength, therefore the rock resistance against loading is reduced.