ANALYSIS AND EVALUATION OF GREY INCIDENCE SYSTEM FOR ROCK BURST PREDICTION

Severe damage can be caused by rock burst because it occurs suddenly and strongly in deep underground engineering construction.It is very important to predict the rock burst.Due to complex influence factors and their relationship,the rock burst cannot be predicted well by using of the traditional index and evaluation-methods.However,the grey incidence system can be used to establish the relevance of various influence factors.This paper analyzes the main factors of rock burst.It selects the rock compressive strength,the rock tensile strength,the rock elastic energy index and the maximum tangential stress of cavern wall as the indexes of criterion for rock burst prediction.A grey incidence system model of rock burst prediction is established.On the bases of engineering experience,the prediction model is applied to practical engineering.The prediction results show that the method of grey incidence analysis can considers the main influence factors of rock burst.It is feasible and valid to predict the rock burst of underground engineering.Comparing with the other prediction methods,the grey incidence system has high accuracy and reliability.The prediction accuracy of rock burst can be improved by choosing more representative engineering experience.