A THEORETICAL-MODEL FOR KAISER EFFECT IN ROCK

The mechanism of Kaiser effect was studied with the aid of a damage mo del for rock. Recognizing that the AE counts are transient elastic wav es due to local damage of the rock, the quantitative relation between AE counts and statistical distribution of the local strength of the ro ck has been established. Subsequently, according to Damage Theory, an expression for Kaiser Effect under uniaxial stress state was derived f rom the model. This is found to be in good agreement with the experime ntal results.