2D numerical analysis of rock damage induced by dynamic in-situ stress redistribution and blast loading in underground blasting excavation

[Display omitted] •The in situ stress redistribution in underground blasts is a dynamic process.•Dynamic stress redistribution generates larger EDZ than that in quasi-static condition.•Dynamic stress redistribution dominates EDZ for the blasts in high-stressed rocks.•PPV threshold for blast damage i...

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Veröffentlicht in:	Tunnelling and underground space technology 2017-11, Vol.70, p.221-232
Hauptverfasser:	Yang, J.H., Yao, C., Jiang, Q.H., Lu, W.B., Jiang, S.H.
Format:	Artikel
Sprache:	eng
Schlagworte:	Blast effects Blast loading Blasting Compressive properties Computer simulation Dynamic in-situ stress redistribution Excavation Excavation damage zone Finite element method Holes Impact damage Mathematical analysis Numerical analysis Numerical simulation Peak particle velocity Rocks Stress waves Studies Tensile stress Two dimensional analysis Underground construction Vibration
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