河南理工大学学报（自然科学版）2016，Vol.35Issue(6)：765-770,6.DOI:10.16186/j.cnki.1673-9787.2016.06.003
加载速率对煤岩损伤及声发射特征影响的数值模拟研究
Numerical simulation study of influence of loading rate on damage and acoustic emission characteristics of coal rock
摘要
Abstract
A numerical simulation experiment is carried out by using RFPA2D numerical simulation with the loading rate of 0.001, 0.003,and 0.005 mm/step in order to study on the loading rate influence of the damage and acoustic emission characteristics of coal rock.The results show that the loading rate has a certain impact on damage and acoustic emission characteristics of coal rock with the increase of the loading rate, the time of macroscopic damage occurs gradually smaller, and a negative correlation is presented.The acoustic emission peak count and peak energy in the process of coal samples increased gradually under different loading, and it is shown a positive correlation.The acoustic emission cumulative counts and cumulative energy with the increase of loading rate are gradually smaller in the process of coal samples under different loading rates, showing a negative correlation.关键词
煤岩/损伤/声发射/加载速率/数值模拟Key words
coal rock/damage/acoustic emission/loading rate/numerical simulation分类
资源环境引用本文复制引用
李小军,李回贵,袁瑞甫..加载速率对煤岩损伤及声发射特征影响的数值模拟研究[J].河南理工大学学报（自然科学版）,2016,35(6):765-770,6.基金项目
国家自然科学基金青年基金资助项目(41204035) （41204035）
高等学校博士学科点专项科研基金(20134116120005) （20134116120005）
