辽宁工程技术大学学报（自然科学版）2025，Vol.44Issue(5)：554-560,7.DOI:10.11956/j.issn.1008-0562.20240073
不同粗糙度岩石界面断层滑移失稳力学特征分析
Mechanical characteristics analysis of fault slip instability of rock interfaces with different roughness
摘要
Abstract
In order to investigate the influence of rock interface roughness on the mechanical characteristics of fault slip,the mechanical characteristics of rock assemblage structures with different roughness under different loading speeds and vertical loads in two-sided shear experiments are investigated.The results show that:the increase of rock interface roughness will improve the strength and arrangement level of the bumps,and the increase of the vertical load will increase the degree of the bumps closure,which will then affect the type and process of the rock slip.The increase of rock interface roughness will increase the interfacial cohesion and slip shear stress,and the average interfacial cohesion can be increased by 9.35%per unit of joint roughness coefficient(JRC)increase.Within a specific range of JRC,the microscopic force chain structure of the fault interface bumps is prone to fracture at the early stage of slip,which will lead to micro-impact precursor events.Increasing the horizontal loading rate reduces the fault surface shear stress during initiation of slip,but the reduction decreases with the increase of rock interface roughness,and the maximum difference of the reduction under different JRC reaches 4.26%.关键词
冲击地压/断层滑移/粗糙度/滑移速度/岩石界面/黏聚力/加载速度/力学特征Key words
rock burst/fault slip/roughness/slip velocity/rock interface/cohesion/loading speed/mechanical characteristics分类
建筑与水利引用本文复制引用
龚政,宋凯,司绪,梁钦锋,赵扬锋..不同粗糙度岩石界面断层滑移失稳力学特征分析[J].辽宁工程技术大学学报（自然科学版）,2025,44(5):554-560,7.基金项目
辽宁省教育厅基本科研项目(JYTZD2023078) （JYTZD2023078）
国家及省级大学生创新训练计划项目(S202410147024) （S202410147024）
