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The document discusses the behavior of brittle rock in deep underground excavations, focusing on the transition from cohesion-controlled strength to brittle spalling failure. It explains the significance of elevated cohesion and low friction in rock mechanics, particularly how these factors influence the onset of spalling during excavation. Understanding this transition is crucial for predicting excavation damage zones and designing effective support systems to ensure safety and stability in tunnel construc

Author

4dgqvxdw7j

Language

EN