Resilient rebound and dynamic rock blasts in deep underground structures
Year: 2026
Type: dissertation
Abstract: The structural risk is compounded when drilling takes place within rock formations characterized by high resistance and high brittleness, where the rock is completely unable to dissipate concentrated stresses. Consequently, the stresses surrounding the excavation face reach a point exceeding the rock's maximum resistance, causing a sudden and instantaneous release of stored strain energy in the form of a violent dynamic rockburst. This explosion leads to the fragmentation of the rock face, accompanied by powerful dynamic shock waves that are directly reflected onto the support elements. These dynamic forces cause the shotcrete layers lining the tunnel to break, and the heavy steel arches and supports to buck and deform, resulting in the sudden collapse of the excavated subsurface section.This research presents the reasons for the shortcomings and failures of traditional experimental design methods, and the inability of current static analysis computer programs and linear finite element models (Linear FEM) to simulate this transient, nonlinear energy release behavior. Based on these shortcomings, the research proposes an integrated engineering framework.For designFlexible reinforcement systems.
Language: English
Topic: Rock Mechanics and Modeling
Subfield: Mechanics of Materials
Field: Engineering
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7225076182