【摘要】 岩石脆性破坏导致的各种现象可以分为两类:①与物理力学参数和结构特征改变有关,表现为岩石本身变得破碎,承载力降低,变形速率增大,模量变小,渗透率增大,波速参数与电阻率值突变;②与能量释放及物理场参数变化有关,体现在声发射信号激增,电磁辐射强度增加,红外辐射加大.试验和理论分析表明:单轴条件下岩石破裂前临界特征点所对应的应力和岩石峰值应力比值约在70%-80%之间.论文通过分析得出,岩石脆性破坏的各种信息与岩石微破裂发展存在特定的关联性,利用综合信息源可以很好的进行脆性破坏临界点的识别.更多还原

【Abstract】 The phenomena caused by rock brittle fracture can be divided into two types.One is related to the changes in physical-mechanical parameters and structural characteristics,which can be described as the rock fracture,the decrease of bearing capacity and modulus,the increase of permeability and deformation,and the sudden change of wave velocity and resistance.The other one is related to the release of energy and change of physical parameters,which is shown by the increase of acoustic emission(AE),electromagnetic emission and infrared radiation.Experiment and theoretical results show that the stress ratio between critical point of brittle failure and its peaking point falls within a range of 70% to 80%.This research shows that the comprehensive information source can be adopted to identify the critical point of brittle fracture.更多还原