Dynamic-static coupling analysis on rockburst mechanism in jointed rock mass
来源期刊：中南大学学报(英文版)2012年第11期
论文作者：JIA Peng(贾蓬) ZHU Wan-cheng(朱万成)
文章页码：3285 - 3290
Key words：rockburst; dynamic disturbance; numerical simulation; jointed rock mass
Abstract: A numerical code called RFPA-Dynamics was used to study the rockburst mechanism under dynamic load based on coupled static-dynamic analysis. The results show that dynamic disturbance has a very distinct triggering effect on rockburst. Under the dynamic load, rockburst is motivated by tensile stress formed by the overlapping of dynamic waves in the form of instantaneous open and cutting through of cracks in weak planes and pre-damaged areas. Meanwhile, the orientation of joint sets has an obvious leading effect on rockburst locations. Finally, a higher initial static stress state before dynamic loading can cause more pre-damaged area, thus leading to a larger rockburst scope.
JIA Peng(贾蓬), ZHU Wan-cheng(朱万成)
(School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China)
Abstract:A numerical code called RFPA-Dynamics was used to study the rockburst mechanism under dynamic load based on coupled static-dynamic analysis. The results show that dynamic disturbance has a very distinct triggering effect on rockburst. Under the dynamic load, rockburst is motivated by tensile stress formed by the overlapping of dynamic waves in the form of instantaneous open and cutting through of cracks in weak planes and pre-damaged areas. Meanwhile, the orientation of joint sets has an obvious leading effect on rockburst locations. Finally, a higher initial static stress state before dynamic loading can cause more pre-damaged area, thus leading to a larger rockburst scope.
Key words:rockburst; dynamic disturbance; numerical simulation; jointed rock mass
