January 2013
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12 Reads
Underground excavation may cause rockburst in highly stressed rock masses. A rockburst event is either classed to strain burst or fault-slip burst in accordance with its triggering mechanism. A strain burst event is simply related to the in-situ stress state in the rock, while a fault-slip burst event is related to both the stress state and the seismic waves. This paper presents the recent study of the relationships of a rockburst event with the in-situ rock stress state and the fault-slip seismic waves. The study shows that the ejection velocity of the ejected rock is mainly dependent on the potential strain energy stored in the rock prior to the burst event. The seismic wave plays a role in triggering burst events in fractured rock masses in most cases.