Abstract：A numerical simulation experiment is carried out by using RFPA2 Dnumerical 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.

Keyword：coal rock;damage;acoustic emission;loading rate;numerical simulation;