“破裂”一词比之“断裂”有着更为广泛的涵义,其论述必然牵涉到破裂构造的许多问题。本文试图在前人工作基础上,通过实验观察,着重讨论剪切破裂的形成机制和模式。 岩石破裂是由于本身存在着弹性应变能的缘故。本世纪六十年代初,罗贝尔思(J.C.Roberts)等人,已将其原理应用到节理裂隙力学机制的分析上。指出应变能u在三向应力(σ_1,σ_2和σ_3)作用下应为 The term “rupture” has a broader meaning than “rupture,” and its argument necessarily involves many problems with rupture formation. Based on the previous work, this paper attempts to observe the formation mechanism and mode of shear fracture through experimental observation. Rock is ruptured because of its own elastic strain energy. In the early 1960s, J.C. Roberts et al. Have applied their principles to the analysis of mechanics of jointed fractures. It is pointed out that strain energy u should be under the action of three-direction stress (σ_1, σ_2 and σ_3)