Rockburst Prediction and Monitoring in Deep Tunneling

Rockburst denotes the sudden, violent failure of rock surrounding an excavation under high stress, posing critical hazards during deep tunneling projects worldwide. As tunnel depths exceed several hundred metres, stress magnitudes in the surrounding rock mass escalate, inducing energy accumulation and the rapid release of seismic events. Prediction and monitoring techniques have advanced to mitigate such risks, combining real-time microseismic surveillance, acoustic emission analysis, numerical modelling and data-driven early warning systems. Microseismic networks deployed in the tunnel lining record small fractures and evolving stress patterns, while fractal and statistical indices derived from seismic energy help to establish quantitative warning thresholds. Numerical simulations incorporating complex geological structures—such as shear zones, joints and faults—enable assessment of stress concentrations and potential failure zones ahead of the excavation face. Integration of these methods with adaptive support measures, including stress relief drilling and yielding support systems, has become central to maintaining tunnel stability. Global case studies from hydroelectric caverns to metro lines highlight the growing importance of predictive monitoring in ensuring both worker safety and project continuity.

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Rockburst Prediction and Monitoring in Deep Tunneling publication trend

The graph below shows the total number of articles in rockburst prediction and monitoring in deep tunneling across all publications each year (not limited to Nature Index journals).

Technical terms

Microseismic monitoring: The deployment of sensitive seismic sensors to detect and locate very small-scale rock fractures around an underground excavation.

Energy fractal dimension: A statistical measure of the complexity of seismic energy release patterns, used to define thresholds for rockburst warnings.

b value: A seismic parameter describing the relative occurrence of small versus large events, where lower values often indicate higher stress conditions and greater rockburst potential.

Shear zone: A planar geological feature along which differential movement has occurred, often concentrating stresses and influencing failure around tunnels.

Rock quality designation (RQD): A metric expressing the degree of fracturing in a rock mass, used to assess its suitability for tunneling and its susceptibility to rockburst.

References

1. Quantitative Threshold of Energy Fractal Dimension for Immediate Rock Burst Warning in Deep Tunnel: A Case Study. Lithosphere (2022).
2. Effect of layered joints on rockburst in deep tunnels. International Journal of Coal Science & Technology (2022).
3. Multivariate Early Warning Method for Rockburst Monitoring Based on Microseismic Activity Characteristics. Frontiers in Earth Science (2022).