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Abstract A large number of field observations have shown that the areas of abnormal stress during roadway excavation are also the ones where rockburst frequently occurs during coal mining. Therefore，a method of dynamic evaluation adopting the microseismic，underground sound and stress monitoring systems to monitor the dynamic information such as the vibrations and the stress signals during roadway excavation is presented to define the risk zones of rockburst and the levels of danger. The static geological data revealed during roadway excavation are added to the exploration data for the static evaluation of rockburst risk at working face. A combined method of evaluation with the dynamic and static data was established. With both the static and dynamic information from the excavation，the proposed evaluation method overcomes the limitation of traditional static evaluation and provides a more accurate basis for rockburst control before mining activities.
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Received: 14 April 2014
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2014, Vol. 33 
