节理迹长与隙宽的相关性对裂隙岩体水力学特性的影响  

EFFECT OF CORRELATION BETWEEN JOINT TRACE AND APERTURE ON HYDRO-MECHANICAL BEHAVIOR OF FRACTURED ROCK MASS

作　　者：吴月秀[1] 刘泉声[1,2] 李金兰[1] 何军[1] 

机构地区：[1]武汉大学水工岩石力学教育部重点实验室,湖北武汉430072 [2]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

出　　处：《岩石力学与工程学报》2014年第A02期3555-3562,共8页Chinese Journal of Rock Mechanics and Engineering

基　　金：国家自然科学基金青年基金项目(41102193);国家自然科学基金重点项目(41130742);教育部创新团队项目(IRT1031)

摘　　要：节理迹长与隙宽的相关性影响节理网络的分布和透水性,最终影响裂隙岩体的水力学特性。为此,结合Sellafield处置库工程,从统计学的角度研究节理迹长和隙宽符合幂律分布时的相关关系,基于离散元软件UDEC分析节理迹长和隙宽的相关性对裂隙岩体水力耦合特性的影响,给出一套考虑节理参数相关性的裂隙岩体水力学计算方法。计算结果表明:节理迹长与隙宽符合幂率分布时,其相关关系呈指数函数形式;考虑两者相关性时,裂隙岩体的渗透率张量及表征单元体积均变大,因此不可忽略节理参数相关性的影响。The correlation between joint trace and aperture has an effect on the distribution and permeability of joint network. Finally,the hydro-mechanical behavior of fractured rock mass is influenced. Based on nuclear disposal project in Sellafield,the correlation between joint trace and aperture was studied when they followed the power-law distribution. With discrete element software UDEC,the effect of correlation between joint trace and aperture on hydro-mechanical behavior of fractured rock mass was analyzed. At the end,a calculation system was proposed to do the hydro-mechanical calculation for fractured rock mass considering the correlation between joint parameters. It is concluded that correlation between joint trace and aperture has a significant effect on hydro-mechanical behavior of fractured rock mass. When the correlation between joint trace and aperture was power-law function,permeability tensor and representative elemental volume（REV） of fractured rock mass increased.

关 键 词：渗透力学 水力耦合 渗透率 表征单元体积 相关关系 幂律分布 

分 类 号：O319.56[理学—一般力学与力学基础]