Abstract:

Based on the engineering application, this paper chooses rock consistence coefficient f, impedanee of rock, explosive consumption and the average crack spacing of rock mass as the judging indexes of coal rock explosive mass classification. Using AHP to determine weights of these four indexes. Evaluation the rock mass blasting classification by constructed the objective function though extending the least squares criterion and building grey correlation model. The result of actual engineering application shows that the grading evaluation result conform to the actual situation. And this has a certain reference value for the fast and safe excavation of coal mine roadway.