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Abstract On the basis of the 5-factors comprehensive method for rockburst classification，the authors put forward an empirical criterion for expressing rockburst potential and intensity. The field investigation and statistic analyses are carried out with help of interaction matrix approach. The proposed criterion is called rockburst potential ，where is maximum value of shear stress in sides walls； is tensile strength； is the intactness index of rock mass. Corresponding to the 4 grades as intense，moderate，weak and no rockburst，the 3 boundary values are presented as 1.7，3.3 and 9.7. General calculation for depths of H = 1 000 and 2 000 m(lateral coefficient = 1.0)，the values are 3.3 and 6.5，corresponding to upper limit of weak rockburst，and median of moderate rockburst，respectively. Case studies for application show the feasibility and reliability of the index .
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Received: 05 November 2012
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2013, Vol. 32 
