煤矿安全2018，Vol.49Issue(4)：216-220,5.DOI:10.13347/j.cnki.mkaq.2018.04.056
基于应变软化模型的岩体单轴压缩裂隙扩展
Crack Propagation of Rock Mass Under Uniaxial Compression Based on Strain Softening Model
摘要
Abstract
The strain softening model and the null model in FLAC3D code are adopted respectively to describe the mechanical behavior of the rock and crack, and the superfine element division method is adopted to divide the calculation model to simulate the crack propagation. This numerical calculation model is adopted to study the effect of crack length, inclination, and number on the crack propagation path and rock mass mechanical behavior under uniaxial compression. The calculation results are as follows:the uniaxial compressive peak strength decreases with the increase of crack length, and the occurrence position and propagation path of the secondary wing crack vary greatly when the crack length is different. The occurrence position and propagation path of the wing crack vary with the crack inclination. The peak strength of the sample varies when the crack inclination changes from 0° to 75°, which changes according to the parabola, and it is the least when the crack inclination is 30°. The crack number has a large effect on the crack propagation path and the sample's failure mode, and the peak strength of the samples gradually decreases with the increase of crack number.关键词
裂隙岩体/应变软化模型/压缩应力应变曲线/裂隙扩展/数值模拟Key words
cracked rock mass/strain softening model/compressive stress-strain curve/crack propagation/numerical simulation分类
矿业与冶金引用本文复制引用
李胡勇,马铮铮,张亚东,刘红岩..基于应变软化模型的岩体单轴压缩裂隙扩展[J].煤矿安全,2018,49(4):216-220,5.基金项目
国家自然科学基金资助项目(41162009) （41162009）
中央高校基本科研业务费资助项目(2017) （2017）
