Dynamic Response of Intermittent Jointed Rock Mass Subjected to Blast Waves

Abstract:

The propagation of blast waves in intermittent jointed rock masses will result in a complex interaction between propagating waves and rock joints. Such being the case, the analysis of dynamic response of rock masses is important to rock engineering design and stability prediction. In this paper, the fracture process of intermittent jointed rock mass subjected to blast waves and initial static field, including wing crack initiation, propagation and arrest, is analyzed using linear superposition principle and sliding crack model. Crack initiation conditions and propagation lengths under incident P-waves is put forward, and the kinking effect of propagating wing cracks subjected to S-wave is also discussed. Additional, it is demonstrated that crack arrest is controlled by static field. In order to validate the correctness of dynamic response analysis, experimental investigations were performed using lucite specimens, and the experimental results show good agreement with the analytical results.

• Periodical: Key Engineering Materials (Volumes 306-308)
• Pages: 1415-1420
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.306-308.1415
• Online since: March 2006
• Authors: Peng shao Yu Qi Wu, Yong Zhang, Wen Ming Gao, Yong Qiang Liu
• Keywords: Blast Wave, Dynamic Response, Fracture Process, Intermittent Jointed Rock Masses, Sliding Crack Model

References

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