摘要
本文借助细观颗粒流PFC2D软件平台探讨了煤岩损伤破坏过程中裂纹演化特征,基于裂纹特征分析了煤岩损伤演化本构模型。研究结果表明:在煤岩损伤各阶段,裂纹的扩展演化过程不同,裂纹的出现主要集中于峰值前后的阶段。基于裂纹参量特征的煤岩单轴压缩损伤本构方程拟合的应力-应变曲线与实际数值曲线具有良好的一致性。
In this paper, the evolution characteristics of cracks in the process of coal-rock damage and fracture were discussed by means of the mesoscopic granular flow PFC2D software platform. Then the constitutive model of coalrock damage evolution was analyzed based on the crack characteristics. The results show that the crack propagation process is different in different stages of coal-rock damage, and the occurrence of crack mainly concentrates on the stage before and after the peak value. Stress-strain curve fitting by damage constitutive equation of coal-rock under uniaxial compression based on parameters of crack have good consistency with the actual numerical curve.
作者
吴晓
邢德栋
张兴远
Wu Xiao;Xing De-dong;Zhang Xing-yuan(Yangcun Coal Mine Yanzhou Mining Group ,Shandong Jining 272000;College of Mining and Safety Engineering, Shandong University of Science and Technology, ShandongQingdao 266590)
出处
《山东煤炭科技》
2019年第10期164-166,共3页
Shandong Coal Science and Technology
关键词
煤岩
颗粒流
裂纹
本构模型
coal-rock
particle flow
crack
constitutive model
