文献类型：期刊文献

中文题名：基于统计岩体力学的裂隙岩体抗压强度各向异性分析

英文题名：Anisotropy Analysis on Compressive Strength of Fractured Rock Mass Based on Statistical Mechanics of Rock Mass

作者：刘文宵[1];伍法权[1,2];岳西蒙[1]

机构：[1]绍兴文理学院土木工程学院,浙江绍兴市312000;[2]浙江省岩石力学与地质灾害重点实验室,浙江绍兴市312000

年份：2022

卷号：42

期号：2

起止页码：108

中文期刊名：矿业研究与开发

外文期刊名：Mining Research and Development

收录：CSTPCD、、北大核心、北大核心2020

基金：国家自然科学基金重点项目(41831290);浙江省科技厅重点研发项目(2020C03093)。

语种：中文

中文关键词：裂隙岩体;强度准则;抗压强度;各向异性

外文关键词：Fractured rock mass;Strength criterion;Compressive strength;Anisotropy

中文摘要：为了分析裂隙岩体的各向异性,提出了能反映岩体各向异性的强度准则,并通过室内试验和Hoek-Brown准则验证此强度准则的有效性。然后采用FLAC^(3D)软件对不同围压下结构面倾角不同的岩体进行单轴及常规三轴压缩试验。模拟结果表明:随结构面倾角的增大,裂隙岩体的单轴抗压强度值先减小后增大,最小值出现在结构面倾角介于45°~60°左右时;当结构面倾角小于结构面内摩擦角时,岩体强度等同于完整的岩块;有围压存在时,裂隙岩体的抗压强度与围压呈线性关系,裂隙岩体的抗压强度曲线波动幅度变小,岩体强度的各向异性随着围压增大而减弱,强度由结构控制转化为应力控制。

外文摘要：In order to analyze the anisotropy of fractured rock mass, a new strength criterion was put forward. Then, its effectiveness was verified by laboratory test and Hoek-Brown criterion. Uniaxial and conventional triaxial compression tests were carried out on the rock masses with different jonit dip angles under different confining pressures. The simulation results show that with the increase of joint dip angle, the uniaxial compressive strength of the fractured rock mass decreases first and then increases, and the minimum value appears at the joint dip angle between 45° and 60°. When the joint dip angle is smaller than the internal friction angle of joint, the strength of the rock mass is equal to rock block. In the presence of confining pressure, the compressive strength of fractured rock mass has a linear relationship with confining pressure, the fluctuation amplitude of the compressive strength curve of fractured rock mass becomes small, the anisotropy of rock mass strength decreases with the increase of confining pressure, and the strength is transformed from structural control to stress control.