非贯通节理岩体抗剪强度影响因素分析

基于修正的Lajtai岩桥破坏理论,研究连通率、形貌节理起伏角、法向压力等因素对非贯通节理岩体抗剪强度的影响,利用人工混凝土模拟类岩石材料,并进行直剪实验论证.结果表明:非贯通节理岩体抗剪强度与起伏角大小成正相关关系,与连通率成负相关关系;其他影响因素相同时,法向压力越大,非贯通节理岩体抗剪强度越大.

Analysis of Influence Factors on Shear Strength of Non-Penetration Jointed Rock Mass

Based on the modified Lajtai rock bridge failure theory, the influence of connection rate, topographic joint undulation angle, normal pressure et al. on shear strength of non-penetration jointed rock mass is studied. Using artificial concrete to simulate the rock, the direct shear experiment is conducted. The result shows that: the shear strength of non-penetration jointed rock mass is positively correlated with the undulation angle, but is negatively correlated with the connection rate; under the same other factors, the normal pressure is positively correlated with the shear strength of non-penetration jointed rock mass.