Abstract:Based on the model for the initiation of coal-gas outbursts developed by J. Litwiniszyn,this paper briefly describes the mining conditions that lead to the coal bumps and a study of the impact on roadway stability caused by dynamic loading of blasting tremor in Zhaogezhuang Coal Mine. A mechanical model is described to analyze the mechanism of coal bumps induced by blasting tremor in deep mining. The FLAC2D is used to analyze the tremor impact on deep excavations and responses of different kinds of support systems in Zhaogezhuang Mine. The material properties are determined by examinations carried out in the mine. The study indicates that the blasting tremor can not only cause the stress redistribution,but also induce decreasing of frictional force between the coal seam and surrounding rock. The results of numerical simulations show that the behavior of the rock mass-support system under the dynamic load and confirm the possible damages to the excavation. The U-shaped steel yielding support system is proved to be efficient to offer superior protection in bursting region to the bolt and net system.