充填型岩石节理剪切力学特性研究进展  

Research progress on shear mechanical behavior of filled rock joints

作　　者：康永水[1,2] 周秀斌 刘滨 卢正[1] 耿志[1,2] 黄友琦 KANG Yong-shui;ZHOU Xiu-bin;LIU Bin;LU Zheng;GENG Zhi;HUANG You-qi(State Key Laboratory of Geomechanics and Geotechnical Engineering,Institute of Rock and Soil Mechanics,Chinese Academy of Sciences,Wuhan,Hubei 430071,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院武汉岩土力学研究所岩土力学与工程国家重点实验室,湖北武汉430071 [2]中国科学院大学,北京100049

出　　处：《岩土力学》2024年第12期3576-3595,共20页Rock and Soil Mechanics

基　　金：国家自然科学基金面上项目(No.42277170,No.U22A20234)。

摘　　要：深部地层断层破碎带分布广泛,通常夹杂断层泥、岩屑等充填物,可显著降低岩体强度,为围岩稳定控制带来严峻挑战。断层破碎带充填型节理的剪切力学特性复杂且受多种因素的影响,如岩石类型及力学特性、节理面粗糙度、充填物矿物组分及力学性质、流体作用(如地下水)。通过回顾充填型岩石节理剪切力学行为的研究历程,对国内外关于充填型岩石节理剪切力学特性的研究现状进行了系统的总结,从室内剪切试验、数值仿真方法、抗剪强度准则及本构模型理论等方面分析了充填型岩石节理剪切力学特性关键科学问题及研究进展,并剖析了不同研究方法中存在的问题及发展趋势。目前普遍认同充填度、充填物矿物组分及力学性质是区别于无充填节理的最重要特征;地下水作用、法向应力、节理壁粗糙度等因素对充填节理力学特性有显著的影响。目前通过宏观唯象方法建立的抗剪强度理论难以精确应用到工程实际中,未来的研究关键及难点主要包括:多尺度充填型岩石节理剪切力学特性、基于充填节理的剪切破坏形成的细观机制、不同种类充填节理的剪切破坏准则及其对应的数值仿真本构模型及细观参数取值方法等。考虑多场耦合条件下多尺度充填节理的复杂行为将是未来充填型岩石节理剪切行为研究的重要发展方向。Fault zones,prevalent in deep geological strata,are commonly filled with fault gouge,rock debris and other fillings,significantly impacting the stability of rock masses.The shear mechanical properties of filled joints within fault fractures are intricate and influenced by various factors,including rock type and its mechanical properties,joint roughness,the mineral composition and mechanical characteristics of the fillings,and as well as interactions,such as groundwater.This paper reviews the research trajectory of the shear mechanical behavior of filled rock joints and provides a systematic summary of the current research status on their shear mechanical properties.The key issues and research progress of shear mechanical properties of filled rock joints are analyzed from the aspects of laboratory shear experiment,numerical simulation,shear strength criterion and constitutive model theory.The existing problems and development trends of different research methods were also analyzed.Presently,filling degree,mineral composition and mechanical properties of fillings are recognized as the most critical distinctions from unfilled rock joints.Additionally,factors like fluid interactions,normal stress,and joint roughness significantly affect the mechanical properties of filled joints.However,the shear strength theories developed through macroscopic phenomenological approaches struggle to find precise application in engineering practices.Future research will primarily tackle the shear mechanical properties of multi-scale rock joints with fillings,focusing on the meso-mechanisms of shear failure within filled joints,the development of shear criteria for different types of filled joints,and the corresponding numerical simulation models and mesoscopic parameter determinations.Investigating the complex behavior of multi-scale filled joints under multi-field coupling conditions is poised to become a leading and pressing research area.

关 键 词：断层带 充填节理 剪切行为 充填物性质 多尺度分析 

分 类 号：TU452[建筑科学—岩土工程]