Abstract：First，the influence factors on burst of coal are studied. On the basis of the theory of identifying attribute，the weight-variable identification model is built up to comprehensively evaluate the burst liability of coal and rock. Coefficient of variable weight is decided by the parameter value of each evaluation units. The burst liability is comprehensively evaluated according to credit level and identification attribute classification is made. Forecast of burst liability can be made before production，so that there is enough time to adopt the measure of relieving danger and to achieve safe production. What is more，the same attribute can be classified into sub-classification by sort in the light of comprehensive score. The example shows that results of this paper are the same with these by elasticity energy index. Furthermore，the proposed method can release the integral danger of evaluation units and describe the dangerous relationship between collectivity and part media.
