摘要
工程控制爆破 ,要研究岩石的定向断裂的裂纹扩展。本文在进行了动载荷作用下径向裂纹产生扩展过程的动光弹试验 ,对应力波的起裂作用 ,爆炸气体的扩裂作用进行了分析研究。文章指出 ,爆破岩石的应力历程及损伤累积是岩石破裂首要条件 ,而原裂纹的存在条件影响裂纹扩展方向。
The purpose of Controlled Blasting Engineering is study the directed fracture of rock and the crack expansion. In this paper, the produce of radial crack under dynamic charge and the expansion process of crack are discussed eave on blasting, the expansion effect of explosion air, and We indicate that the first line term of rock rupture is the presence of stress course and damni fication Cumulation, and the fracture expansion direction is affected by the presence condition of the original fractures. We also discuss the distribution principle of active fracture and the expression of fracture density.
出处
《西南工学院学报》
2000年第1期60-66,共7页
Journal of Southwest China Institute of Technology
基金
四川省科委资助项目
关键词
定向断裂
裂纹扩展
动载荷
岩石
爆破
Directed fracture
crack expansion
Dynamic charge
Damnification cumulation
