等效节理岩体表征单元体研究

发布时间：2018-03-28 10:24

本文选题：随机节理三维网络模型　切入点：等效节理岩体　出处：《中国矿业大学学报》2014年06期

【摘要】：岩体力学参数具有表征单元体(REV).以特大型露天矿内蒙古白云鄂博铁矿东矿为研究背景,根据现场节理测线法调查与室内岩石力学试验,将随机节理三维网络模拟技术与块体离散元分析方法相结合,构建了反映节理真实空间状态的多尺度等效节理岩体模型.通过数值试验得出了各尺度等效岩体单轴压缩应力-应变曲线,研究了岩体的单轴压缩力学性质及力学参数表征单元体.研究表明:随着等效岩体尺度增大,岩体峰值强度、变形模量和残余强度逐渐减小,当尺度增大到15~20m时趋于恒定,进而得到研究对象的岩体表征单元体为15m×15m×15m,该尺度岩体的单轴抗压峰值强度和变形模量分别为0.67 MPa,22.0GPa,为后续岩体工程稳定与安全评价提供了基础数据.
[Abstract]:The mechanical parameters of rock mass with the manifestative unit (REV). The oversize open pit of Inner Mongolia Baiyunebo iron mine as the research background, according to the field survey line survey and indoor rock mechanics test, the combination of random 3D joint network simulation technology and block discrete element analysis method, constructs the multi scale equivalent model of jointed rock mass reflected joint state space. By numerical experiments of various scale equivalent rock uniaxial compression stress-strain curve of uniaxial compressive mechanical properties and mechanical parameters of rock mass element. Research shows that with the equivalent rock mass scale increases, the peak strength of rock mass, deformation modulus and residual strength decreases, when the scale increased. 15~20m tends to be constant and rock mass characterization unit research object is 15m * 15m * 15m, uniaxial compressive strength and deformation modulus of the peak size of rock The 0.67 MPa and 22.0GPa respectively provide basic data for the stability and safety evaluation of the subsequent rock mass engineering.

【作者单位】：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;
【基金】：国家自然科学基金项目(51074014,51174014)
【分类号】：TU452

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