Analysis and numerical simulation of dynamic effect on rock under high pressure water jet  

作　　者：李晓红 司鹄 王丹丹 

机构地区：[1]Key Lab.for the Exploration of Southwestern Resource & Environmental Disaster Control Engineering,Ministry of Education,Chongqing University,Chongqing 400030,China [2]Department of Safety Engineering,Chongqing University,Chongqing 400030,China

出　　处：《Journal of Coal Science & Engineering(China)》2008年第2期209-212,共4页煤炭学报（英文版）

基　　金：the National Natural Science Foundation of China(5062140)

摘　　要：Based on continuum mechanics and rock dynamics,analyzed the micro-struc- ture damage of rock and the impulsive effect under high pressure water jet and developed the dynamic model.Further,on the assumption of that rock was homogeneous and iso- tropic,a computational model was established based on nonlinear finite element and Arbi- trary Lagrangian-Eulerian(ALE) method.The dynamic effect impacted on rock under high pressure water jet was simulated by the dynamic contact method.The propagation of stress wave in rock was numerically simulated at different impacting velocity.The results show that the propagation velocity of stress wave is proportional to the impacting velocity of high pressure water jet.The faster the impacting velocity is,the quicker the comedown of stress wave.Based on continuum mechanics and rock dynamics, analyzed the micro-structure damage of rock and the impulsive effect under high pressure water jet and developed the dynamic model. Further, on the assumption of that rock was homogeneous and isotropic, a computational model was established based on nonlinear finite element and Arbitrary Lagrangian-Eulerian（ALE） method. The dynamic effect impacted on rock under high pressure water jet was simulated by the dynamic contact method. The propagation of stress wave in rock was numerically simulated at different impacting velocity. The results show that the propagation velocity of stress wave is proportional to the impacting velocity of high pressure water jet. The faster the impacting velocity is, the quicker the comedown of stress wave.

关 键 词：high pressure waterjet impulsive dynamics stress wave nonlinear finite element 

分 类 号：TD313[矿业工程—矿井建设]