Evaluation and application of rock burst intensity of composition meta-model based on improved evidence theory

In order to solve the problem that it is hard for extension theory to differentiate weight when it is applied on rock burst intensity, the Dempster rule of evidence theory is introduced to extension model. Dempster rule calculates subjective weight and improved entropy method to get entropy weight and make synthesis to ensure the rationality of weight determination. The three factors, respectively ratio of maximum shear stress and compressive strength of rock mass σθ/σc, ratio of compressive strength σc/σt,and extension strengthctss, and elastic energy index Wet, are selected to build determination and evaluation matter-element model of rock burst intensity based on evidence theory. With the help of mat lab language and programming module, intelligent, accurate and high precise evaluation of rock burst intensity finally comes true. In the end, through the case study on rock burst intensity of Mount Donggua copper mine and Maluping deep buried hard rock mining area, it shows that criterion and evaluation results of the model are consistent with actual engineering, which is a feasible method. © 2015 ejge.