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.
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Foundation item: Project(90401004) supported by the Fundamental Research Funds for the Central Universities of China; Projects(20100471465, 201104572) supported by China Postdoctoral Science Foundation; Project(20091029) supported by Postdoctoral Science Foundation of Liaoning Province, China; Projects(50934006, 51111130206) supported by the National Natural Science Foundation of China
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Jia, P., Zhu, Wc. Dynamic-static coupling analysis on rockburst mechanism in jointed rock mass. J. Cent. South Univ. 19, 3285–3290 (2012). https://doi.org/10.1007/s11771-012-1405-7
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DOI: https://doi.org/10.1007/s11771-012-1405-7