工程科学学报，第37卷，第12期：1542-1549,2015年12月 Chinese Journal of Engineering,Vol.37,No.12:1542-1549,December 2015 D0l:10.13374/j.issn2095-9389.2015.12.002:http://journals..ustb.edu.cn 节理岩体数值模拟及力学参数确定 赵 伟2，吴顺川2区，高永涛2》，周喻12，肖术12) 1)北京科技大学土木与环境工程学院，北京1000832)北京科技大学金属矿山高效开采与安全教育部重点实验室，北京100083 ☒通信作者，Email:wushunchuan@163.com 摘要采用FLAC3D程序和离散裂隙网络技术构建的遍布节理岩体模型能同时考虑节理岩体中节理和岩体的作用，具有 概念清晰、建模快捷、计算效率高等特点.首先对现场结构面测绘数据进行统计分析，获得其概率分布特征参数，在此基础上 分两尺度考虑节理并确定其离散裂隙网络模型；其次基于离散裂隙网络模型构建相应的节理岩体模型，研究其强度特征并获 取工程岩体单轴抗压强度；结合Hoek-一Bown、Mohr-Coulomb准则及最大围压拟合综合确定节理岩体力学参数；最后将拟合所 得参数用于边坡稳定性分析，分别运用强度折减法和极限平衡法计算两种模型的安全系数，对比发现计算结果基本一致，表 明所提出的研究思路用于确定节理岩体参数是可行的. 关键词节理岩体；数值模拟：力学性能：参数确定：边坡稳定性分析 分类号TU452 Numerical modeling and mechanical parameters determination of jointed rock mass ZHAO Wei2,WU Shun-chuan),GAO Yongtao2),ZHOU Yu2),XIAO Shu2) 1)School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China 2)Key Laboratory of the Ministry of Education of China for Efficient Mining and Safety of Metal Mines,University of Science and Technology Beijing, Beijing 100083,China Corresponding author,E-mail:wushunchuan@163.com ABSTRACT A ubiquitous jointed rock mass (UJRM)model constructed by combining the FLAC3D software and discrete fracture network (DFN)technique,which takes the features of rock and joints into account,has a clear concept,high efficiency of modeling and calculation,and so on.Firstly,the in-situ survey results of joints were statistically analyzed to obtain their probability distribution parameters,on the basis of which the joints were considered in two scales and their DFN models were determined.Secondly,based on the determined DFN models,the jointed rock mass was modeled and the strength characteristics were researched to get the uniaxial compressive strength (UCS)of engineering rock mass,then the mechanical parameters of jointed rock mass were fitted and determined by the Hoek-Brown and Mohr-Coulomb criteria while considering the max confining stress.Finally,the determined parameters were applied to slope stability analysis,the safety factors of the two kinds of criterions solved by the limit equilibrium method (LEM)and the strength reduction method (SRM)are basically the same,indicating that using the proposed approach to determine the mechanical parameters of jointed rock mass is practicable. KEY WORDS jointed rock mass:numerical modeling:mechanical properties:parameter determination;slope stability analysis 岩体强度和变形特征等相关参数是分析岩土工程数的工作仍是相当困难的.室内实验主要针对完整岩 问题的最重要信息，然而至今有效并快捷获取这些参块，并未考虑尺寸效应及不连续面的影响，而原位实验 收稿日期：2014-09-10 基金项目：国家自然科学基金资助项目(51074014,51174014)：国家青年科学基金资助项目(51504016)：科技北京百名领军人才培养工程资 助项目(Z151100000315014)工程科学学报，第 37 卷，第 12 期: 1542--1549，2015 年 12 月 Chinese Journal of Engineering，Vol． 37，No． 12: 1542--1549，December 2015 DOI: 10． 13374 /j． issn2095--9389． 2015． 12． 002; http: / /journals． ustb． edu． cn 节理岩体数值模拟及力学参数确定 赵 伟1，2) ，吴顺川1，2) ，高永涛1，2) ，周 喻1，2) ，肖 术1，2) 1) 北京科技大学土木与环境工程学院，北京 100083 2) 北京科技大学金属矿山高效开采与安全教育部重点实验室，北京 100083  通信作者，E-mail: wushunchuan@ 163． com 摘 要 采用 FLAC3D 程序和离散裂隙网络技术构建的遍布节理岩体模型能同时考虑节理岩体中节理和岩体的作用，具有 概念清晰、建模快捷、计算效率高等特点． 首先对现场结构面测绘数据进行统计分析，获得其概率分布特征参数，在此基础上 分两尺度考虑节理并确定其离散裂隙网络模型; 其次基于离散裂隙网络模型构建相应的节理岩体模型，研究其强度特征并获 取工程岩体单轴抗压强度; 结合 Hoek--Brown、Mohr--Coulomb 准则及最大围压拟合综合确定节理岩体力学参数; 最后将拟合所 得参数用于边坡稳定性分析，分别运用强度折减法和极限平衡法计算两种模型的安全系数，对比发现计算结果基本一致，表 明所提出的研究思路用于确定节理岩体参数是可行的． 关键词 节理岩体; 数值模拟; 力学性能; 参数确定; 边坡稳定性分析 分类号 TU452 Numerical modeling and mechanical parameters determination of jointed rock mass ZHAO Wei1，2) ，WU Shun-chuan1，2)  ，GAO Yong-tao1，2) ，ZHOU Yu1，2) ，XIAO Shu1，2) 1) School of Civil and Environmental Engineering，University of Science and Technology Beijing，Beijing 100083，China 2) Key Laboratory of the Ministry of Education of China for Efficient Mining and Safety of Metal Mines，University of Science and Technology Beijing， Beijing 100083，China  Corresponding author，E-mail: wushunchuan@ 163． com ABSTＲACT A ubiquitous jointed rock mass ( UJＲM) model constructed by combining the FLAC3D software and discrete fracture network ( DFN) technique，which takes the features of rock and joints into account，has a clear concept，high efficiency of modeling and calculation，and so on． Firstly，the in-situ survey results of joints were statistically analyzed to obtain their probability distribution parameters，on the basis of which the joints were considered in two scales and their DFN models were determined． Secondly，based on the determined DFN models，the jointed rock mass was modeled and the strength characteristics were researched to get the uniaxial compressive strength ( UCS) of engineering rock mass，then the mechanical parameters of jointed rock mass were fitted and determined by the Hoek--Brown and Mohr--Coulomb criteria while considering the max confining stress． Finally，the determined parameters were applied to slope stability analysis，the safety factors of the two kinds of criterions solved by the limit equilibrium method ( LEM) and the strength reduction method ( SＲM) are basically the same，indicating that using the proposed approach to determine the mechanical parameters of jointed rock mass is practicable． KEY WOＲDS jointed rock mass; numerical modeling; mechanical properties; parameter determination; slope stability analysis 收稿日期: 2014--09--10 基金项目: 国家自然科学基金资助项目( 51074014，51174014) ; 国家青年科学基金资助项目( 51504016) ; 科技北京百名领军人才培养工程资 助项目( Z151100000315014) 岩体强度和变形特征等相关参数是分析岩土工程 问题的最重要信息，然而至今有效并快捷获取这些参 数的工作仍是相当困难的． 室内实验主要针对完整岩 块，并未考虑尺寸效应及不连续面的影响，而原位实验