Confirmation seminar presented by Tengzhou Wang.

Time-delayed rockbursts, which typically exhibit six days to months post-excavation, pose a significant hazard in deep tunneling. However, understanding of the occurrence mechanism of this type of rockburst remains lacking. To investigate the underlying mechanisms of time-delayed rockbursts in deep tunnels, this study focuses on the role of rock crack initiation (CI) threshold as a key factor in understanding these events. CI not only reflects the in-situ spalling strength but also delineates the lower boundary of long-term rock strength. Through laboratory experiments that simulate stress conditions in deep tunnels over time via cyclic and creep loading, this research exposes the stress-related triggers of time-delayed rockbursts. The findings aim to solidify the predictive models, offering a proactive approach to understanding and mitigating these complex geological phenomena.

About Confirmation Seminars

The purpose of the confirmation milestone is to ensure that the candidate receives appropriate feedback in relation to the viability and progress of the thesis project and that the resources required to complete the program of research within the recommended timeframe are available. It is also an opportunity to ensure that the candidate has demonstrated the capacity and capability to successfully complete the thesis in a timely manner.


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