摘要
本文在[1]研究结果的基础上,采用岩石断口分析技术,进一步研究了三种硬岩的切削断裂应力性质.文中分析了岩石受纯拉应力、纯剪应力作用后的断口形貌;将岩石切削断裂切屑断口形貌与它作了对比分析;指出,岩石切削断裂裂纹的生成和扩展,主要是由拉应力作用引起的,剪应力的作用相对较小.
Based on the results of ref.[1],the nature of rock-cutting-induced fracture stress in three kinds of hard rocks are studied by the technique of fractographic analysis of rock chips. The fractographie results of rock fragments obtained by tensile and shear tests are compared with those of rock chips produced by rock-cutting. The results show that the fracture initiation and propagation induced by rock-cutting are mainly caused by the action of tensile stresses while the effect of shear stresses plays only an insignificant role.
出处
《岩石力学与工程学报》
EI
CAS
CSCD
1990年第3期209-215,共7页
Chinese Journal of Rock Mechanics and Engineering
