摘要
在流形元基本理论基础上,引入断裂力学的裂纹产生及扩展判据,应用二阶流形元对岩石双孔爆破过程进行了研究,模拟了双孔同时起爆和毫秒延时起爆两种条件下裂纹的产生和扩展、块体的形成以及漏斗形成过程,分析了爆炸载荷作用下岩石的破坏规律以及起爆条件对该过程的影响,验证了流形元法在研究冲击载荷作用下岩石从连续体到不连续体破坏过程的准确性和有效性,为研究类似问题提供一个新的思路和方法。
Based on the fundamental theories of numerical manifold method （NMM）, a criterion of crack initiation and crack growth is introduced into NMM. NMM is used to numerically study the process of two-hole blasting, in which two different initiation conditions are considered. One is simultaneous initiation, the other is 0.1 ms delay initiation. The whole blasting process including crack initiation, crack growth, the formation of fragments and the formation of a blasting crater is simulated. The failure mechanisms of rock under blasting loading and the influences of initiation conditions on that process are analyzed. NMM has proven to be an effective and accurate method for in the study of rock failure from a continuous mass to a discontinuous mass. The results provide further insights and a new method in the research of the related issues.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2006年第5期434-440,共7页
Explosion and Shock Waves
关键词
爆炸力学
岩石破坏过程
流形元法
双孔爆破
冲击载荷
数值模拟
mechanics of explosion
process of rock failure
numerical manifold method
two-hole blasting
shock loading
numerical simulation
