标题：Interaction mechanism of yielding rock bolt and matrix mass
作者：Jiang, Yujing ;Wu, Xuezhen ;Wang, Gang ;Li, Bo ;Iura, Tomomi
作者机构：[Jiang, Yujing ;Wu, Xuezhen ;Li, Bo ] Nagasaki University, Graduate School of Engineering, 1-14 Bunkyo-machi, Nagasaki, Japan;[Jiang, Yujing ;Wu, Xuez 更多
会议名称：13th ISRM International Congress of Rock Mechanics 2015
会议日期：May 10, 2015 - May 13, 2015
来源：13th ISRM International Congress of Rock Mechanics
摘要：Yielding bolt has been widely used for rock reinforcement in mining and civil engineering in high stress conditions. However, the interaction mechanism of yielding bolt and matrix mass is still not clear at present, and no analytical model is available to predict its reinforcement effect quantitatively. In this paper, the mainstream yielding rock bolts were reviewed firstly. After that, a coupling model is proposed to account for the interaction between yielding bolt and matrix mass. Based on the plane strain axial symmetry assumption and the incremental theory of plasticity, equilibrium equations and compatibility equations of matrix mass, and also the response of yielding rock bolt are deduced theoretically. The proposed method was programmed in Visual Basic development environment, and a semi-analytical solution for the coupling model is achieved. The reinforcement mechanism of yielding bolt in conventional tunnelling is clearly demonstrated through an illustrative case study. The reinforcement effect of yielding bolt is estimated quantitatively, and the distribution of axial force along the bolt is presented. In addition, the validity of proposed method is verified by numerical simulations.
© 2015 by the Canadian Institute of Mining, Metallurgy & Petroleum and ISRM.