Numerical simulation study of influence of loading rate on damage and acoustic emission characteristics of coal rock
LI Xiaojun
LI Huigui
YUAN Ruipu
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.
Keywords：coal rockdamageacoustic emissionloading ratenumerical simulation
Publication Date：2016-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 765-770 )