SUN Qiang, XUE Lei, ZHU Shu-yun. Analysis of critical acoustic emission information of sandstone brittle failure with stress ratio[J]. 2012, 33(9).DOI:
According to the constitutive equation of rock brittle fracture and 3D renormalization group theory
it is obtained the mathematical expression of stress ration between the critical point before fracture and peaking point. The acoustic emission (AE) characteristics of deep purple red sandstone under uniaxial compression are tested and obtained in the laboratory. According to the relevant test data
it is shown that the stress ratio between the AE mutation of critical state and peaking state has a value of nearly to 74%