Failure mode and strength anisotropic characteristic ofstratified rock mass under uniaxial compressive situation
来源期刊：中南大学学报(英文版)2009年第4期
论文作者：鲁光银 朱自强 柳群义 何现启
文章页码：663 - 669
Key words：stratified rock mass; failure mode; strength; anisotropic characteristic; numerical analysis
Abstract: A stratified rock mass model was founded by FLAC3D. The failure mode and anisotropic characteristic of strength for stratified rock mass were analyzed. The analysis results show that the numerical simulation can visually reflect the failure modes of rock samples under different inclination angles β of structural plane. The stiffness of rock sample before peak strength changes in the compressive procedure. With the increase of β, the compressive strength σc of rock sample decreases firstly and then increases; when β is in the range of 20？°-30° and 80°-90°, σc has the largest sensitivity to β; while β falls in the range of 30°-70°, σc varies little. When j＜β＜90°. (φj is friction angle of structure plane), the results obtained from numerical simulation and theoretical analysis are in almost the same values; while β≤ j or β=90°, they are in great different values. The results obtained from theoretical analysis are obvious larger than those from numerical simulation; and the results from numerical simulation can reflect the difference of compressive strength of rock samples for the two situations of β≥φj and β=90°, which is in more accordance with the real situation.
基金信息：the National Natural Science Foundation of China
