Energy-Absorption Mechanisms in Rock Support Systems
Summary
Rock support systems are critical to ensuring stability and safety in underground excavations, road tunnels and other civil and mining structures. These systems must withstand a complex spectrum of static and dynamic loads arising from geological stress, rock bursts, seismic events and construction activities. Energy-absorption mechanisms are integrated into bolts, anchor cables and yielding supports to dissipate the kinetic and strain energy generated by sudden ground movements. Common approaches involve deformable components such as springs, memory alloys or specialised yield rings that undergo controlled plastic or visco-elastic deformation. Some designs incorporate negative Poisson’s ratio materials to maintain constant resistance under large displacements, while others use segmental embedding to extend the yielding range. These mechanisms prevent abrupt failure by redistributing loads, reducing peak stresses and accommodating deformations without compromising support integrity. Recent advances have emphasised real-time monitoring of deformation, adaptive yielding behaviour and the development of intelligent terminal structures capable of both energy dissipation and deformation sensing. Collectively, these innovations enhance the resilience of rock support systems, reduce maintenance interventions and improve operational safety in diverse geological contexts around the world.
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Energy-Absorption Mechanisms in Rock Support Systems publication trend
The graph below shows the total number of articles in energy-absorption mechanisms in rock support systems across all publications each year (not limited to Nature Index journals).
Technical terms
Energy-absorption capacity: The ability of a support system to dissipate kinetic or strain energy through controlled deformation.
Yielding mechanism: A built-in component or design feature that deforms plastically or visco-elastically under load to prevent brittle failure.
Negative Poisson’s ratio: A material property where deformation in one direction leads to expansion, rather than contraction, in the transverse direction, enabling constant resistance under load.
Strainburst: A rapid release of stored elastic energy in rock masses resulting in sudden ejection of rock fragments and high dynamic loads.
Deformable support system: A support assembly incorporating elements that yield or adjust under stress to dissipate energy and accommodate displacement.
References
- Yielding Performance of an Intelligent Terminal Structure for Cable Bolts. Journal of Intelligent Construction (2024).
- Compensation mechanics application of NPR anchor cable to large deformation tunnel in soft rock. International Journal of Coal Science & Technology (2024).
- Evaluation of the Effects of Yielding Rockbolts on Controlling Self-Initiated Strainbursts: A Numerical Study. Energies (2022).
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