江苏大学学报（自然科学版）2012，Vol.33Issue(4)：469-473,5.DOI:10.3969/j.issn.1671-7775.2012.04.019
混合花岗岩加载细观力学特性及破裂演化规律
Micro-mechanical characteristics and cracks revolution laws of migmatitic granite under different loading conditions
摘要
Abstract
According to the physical and mechanical parameters from laboratory experiments and the grains section scanning, micro-geometric model and micro-mechanical parameters of migmatitic granite grains were built based on particle flow theory and PFC programs. Loading codes were developed, and some functions were adjusted by Fish language to simulate uniaxial and triaxial compression experiments. Based on comprehensive comparison and analysis of stress-strain curves, acoustic emission and "Crack" monitoring results from laboratory and PFC numerical simulation, the micro-mechanical characteristics and the cracks revolution laws from microcosm to macrocosm of migmatitic granite from -45 m level of Xingshan Iron Mine were obtained under different loading conditions. According to the comparison of simulation results of rock uniaxial compression and triaxial compression at different confining pressures with laboratory experiments, PFC can accurately simulate the micro-mechanical characteristics and kinematic behaviors of rock grains under different loading conditions.关键词
混合花岗岩/颗粒流/键结颗粒模型/力学特性/破裂Key words
migmatitic granite/particle flow/bonded particles model/mechanical characteristics/cracks分类
建筑与水利引用本文复制引用
苗胜军,杨志军,龙超,任奋华..混合花岗岩加载细观力学特性及破裂演化规律[J].江苏大学学报（自然科学版）,2012,33(4):469-473,5.基金项目
国家自然科学基金资助项目(11002021) （11002021）
中央高校基本科研业务费专项资金资助项目(FRF-BR-10-029B) （FRF-BR-10-029B）
