Abstract: In order to make objective evaluation of rock-burst risk，a comprehensive evaluation model is presented based on matter-element extension and variable weight theory.Firstly，the indicator data is done by regularization for solving the limitation of traditional matter-element;secondly，the weight is defined based on variable weight to avoiding subjectivity，and the object that is evaluated can active participation;thirdly,the maximum membership is replaced by asymmetric close degree;Lastly,the rock-burst risk level is determined by level variable eigenvalue of counting,the key indicators are determined by sensitivity counting.Taking Jiama Mine as an example,the evaluation results show that the grade of rock burst is weak and tend to non-rock-burst,which is coincide to the actual situation and already results.The key indicators are tendency index and stress index,the general sensitivity index is stress coefficient.

Key words: Risk evaluation, Rockburst, Matter-element extension model, Variable weight theory, Sensitivity analysis