【摘要】 根据岩石脆性破坏的本构方程和三维重整化理论,推导出了岩石破裂前声发射信号激增的临界点所对应的应力和岩石峰值应力比值的数学表达式。通过测试深部紫红色砂岩单轴加载变形破裂全过程中力学与声发射特征,得到了全过程力学特征曲线、声发射能量累计数等相关数,发现岩石破裂前声发射突增点所对应的应力与岩石临界点相对应。单轴刚性加载条件下岩石脆性破裂前声发射突增点所对应的应力与峰值应力比值大部分近似在74%左右,误差在±9%以内。更多还原

【Abstract】 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%,and the deviation is less than ±9%.更多还原