Research On Numerical Simulation Of Rock Burst Based On FLAC Software And Its Risk Prediction Method

Coal is the most importance power in our country, and with the increase of mining production and mining depth, the rockburst accidents occur frequently which caused severe casualty and economic loss. The mechanism of rock is extremely complex and there is no recognized theoretical until now. Prediction Method of rockburst has greatly improved space, too. Therefore, it has important practical significance to research the influence of rockburst and its prediction method.According to the actual condition of Laohutai Mine, rockburst disaster in tunnel excavation is researched with lagrangian finite simulation. Multiple numerical models are built to research the influence of excavation to the models'stress and strain. By comparison, the possibility of rockburst is analysed when the mining depth, support conditions and rock property of roof and floor are different. The strain-stress distribution rules of models are summarized and the possibility of rockburst is analysed.Rockburst prediction method is reseached by numerical simulation and field displacement electromagnetic radiation monitoring combining the actual condition of 83002# face. Mathematical model is established using Fuzzy Pattern Recognition to fix the membership curve and regression curve of electromagnetic radiation intensity. According to the regression curve formula, the critical value of maximum electromagnetic radiation intensity for prediction is determined. The results will provide theoretical basis for rockburst prediction of coal mine enterprise.