结构面倾角对节理岩体的连通特性和综合抗剪强度的影响

本文介绍了一种确定岩体结构面连通率的方法，该方法首先在岩体结构面网络中搜索到结构面-完整岩石组合的最小抗剪力路径，然后在此最小抗剪力路径上计算结构面的连通率。在考虑结构面的倾角后，本文首先推导出计算结构面抗剪应力的公式，进而提出在岩体结构面网络中搜寻最小抗剪力路径的方法。算例分析表明，考虑结构面倾角后，计算得出的结构面的连通率一般变小，而且在变化的幅度上不能忽略。文中还提供了一种新的确定岩体综合抗剪强度的方法，该综合抗剪强度不仅考虑了结构面和岩桥的抗剪破坏机理，还考虑了另一重要因素——结构面倾角的影响。实例分析表明结构面的倾角对确定岩体的综合抗剪强度影响很大。

Determination of persistence and comprehensive shear strength of jointed rock mass based on

This paper presents a method that determines joint persistence ratio by searching in a joint map the joint intact rock combination with least shear resistance. Equations calculating comprehensive shear strength of rock bridges and joints have been developed. The comprehensive strength considers not only the shear resistance of joints and rock bridges but also the waveness created by the variations in dip angles between two adjacent joints. In general, the joint persistence ratio so obtained is less than that obtained by neglecting the waveness. Examples of practical applications indicated that a proper consideration of the dip angles of the joints is of important significance in the determination of the comprehensive shear strength of jointed rock mass.