等厚度水平层状岩体声发射试验研究OA

Layered rock masses are widely found in nature,and their mechanical behavior and failure characteristics play a key role in rock engineering.However,previous studies have mainly focused on bedding dip angles and rarely reported on the impact of changes in rock formation strength.In this paper,uniaxial compression tests are carried out on horizontal layered rock masses with uniform thickness with intermediate layers of different strengths.Acoustic emission technology was used to study the damage and failure characteristics of layered rock samples.The results show that the peak strength,peak strain and elastic modulus are related to the strength of the intermediate layer.Acoustic emission events are mainly distributed in the middle rock strata.As the strength of the middle rock strata increases,the number of acoustic emission events in the upper and lower rock strata first increases and then decreases.