论文部分内容阅读
介绍了地震裂缝的类别、基本特征、分布规律,从发育规模和失稳机制对各类地震裂缝的特点和破坏特征进行了理论分析,探讨了地震裂缝的展布、发育特征、变形迹象,并利用岩石断裂力学机理,结合应力强度因子方法分析结构面的震裂损伤机制。研究结果表明:1根据斜坡地震裂缝的形态特征和变形迹象分为表面型、贯穿型、走向型、倾向型、闭合型、扩展型6种基本类型;2斜坡上地震裂缝总体走向在N30°~60°E;3地震裂缝主要分布在发震断层附近或者山脊位置以及斜坡陡缓交界部位,裂缝延伸性好、张开程度高,充填较少或者无充填;4地震裂缝力学机制主要属于拉张裂缝,岩体结构面在动力作用下的变形破坏过程分为破裂、扩展、贯通3个阶段。
The types, basic characteristics and distribution of seismic fractures are introduced. The characteristics and damage characteristics of all kinds of seismic fractures are analyzed theoretically from the development scale and instability mechanism. The distribution and development characteristics of seismic fractures and deformation signs are also discussed Fracture damage mechanism of structural plane is analyzed by means of rock fracture mechanics and stress intensity factor method. The results show that: 1 According to the morphological characteristics and deformations of the slope seismic fractures, there are 6 basic types: surface type, through type, strike type, propensity type, closed type and extended type. The general trend of the seismic cracks on the 2 slopes is between N30 ° ~ 60 ° E. 3 Seismic fractures are mainly distributed near the seismogenic fault or at the ridges and steeply sloped boundaries with good extensibility of cracks, high degree of openness, little filling or no filling. 4 The mechanical mechanism of seismic fractures mainly belongs to extension Cracks, rock structure surface in the process of deformation and failure under the action of fracture is divided into three stages of rupture, expansion, through.