层面摩擦对组合岩体破坏失稳的影响研究  

STUDY ON THE FAILURE AND INSTABILITY OF COMPOSITE ROCK MASS DUE TO LAYER FRICTION

作　　者：张恒 贾兴院 陈向前 周擎 朱亚威 雷升博 ZHANG Heng;JIA Xing-yuan;CHEN Xiang-qian;ZHOU Qing;ZHU Ya-wei;LEI Sheng-bo(School of Civil Engineering,Nanyang Institute of Technology,Nanyang 473000,China;Shandong Tangkou Coal Industry Co LTD,Jining 100083,China)

机构地区：[1]南阳理工学院土木工程学院,河南南阳473000 [2]山东唐口煤业公司,山东济宁100083

出　　处：《南阳理工学院学报》2024年第6期89-94,共6页Journal of Nanyang Institute of Technology

基　　金：河南省自然科学基金(242300420353);南阳市基础与前沿技术研究专项计划项目(23JCQY2014)。

摘　　要：为了探究层面摩擦对组合岩体破坏失稳的影响,采用不同粒径砂粒来模拟不连续接触面岩体的层面摩擦效应。研究结果表明:砂粒直径较小时,组合岩体失稳表现为滑移失稳,宏观裂隙表现为局部微裂隙扩展;颗粒直径较大时,组合岩体表现为破碎失稳,宏观裂隙表现为整体贯穿裂隙扩展;组合岩体失稳峰值应力、峰值能量和振铃计数随着砂粒粒径的增加而增大。因此,可以通过层面摩擦分析推测组合岩体失稳类型及特征,为预防顺层岩质边坡破坏失稳提供参考。Frictional sliding is one of the main characteristics of deformation and failure of rock mass with discontinuous contact surface.In order to investigate the influence of layer friction on the failure and instability of composite rock mass,different particle sizes of sand are used to simulate the layer friction effect of discontinuous contact surface rock mass.The results show that when the sand diameter is small,the instability of composite rock mass is slip-instability,and the macro fracture is local micro-fracture expansion.When the particle diameter is large,the composite rock mass is fractured and unstable,and the macro fracture is the whole penetration fracture expansion.The instability peak stress,peak energy and ringing count of composite rock mass increase with the increase of sand particle size.Therefore,the types and characteristics of the instability of the combined rock mass can be inferred through the analysis of the plane friction,which can provide a reference for preventing the failure and instability of the bedding rock slope.

关 键 词：声发射 岩石破坏 层面摩擦 组合岩体 

分 类 号：TU45[建筑科学—岩土工程]