Abstract:
In order to study the quantitative evaluation method of the rock burst hazard in the shallow part of the mine, and to realize the evaluation and classification of the rock burst in the stope.Based on the principle of stress superposition, an equivalent mining depth estimation model is established, and an equivalent mining depth estimation method is proposed, and the calculation process of the method is determined.The results show that the equivalent mining depth is positively correlated with the actual mining depth, and negatively correlated with the size of the ore pillar.A shallow mine in Shandong province is taken as the engineering background.The stress concentration of the surrounding rock in the stope has occurred due to tunnel excavation and structural stress, so the rock burst occurs at shallow levels that have not reached the rock burst depth.The equivalent mining depth estimation method is used to evaluate the rock burst classification of the 450 m stope in the shallow mine, and a total of 48 ore units are divided into 1 highly dangerous zone, 9 medium dangerous zones, 4 general dangerous zones, 34 safety zones, and rock burst prevention measures have been taken in different areas to achieve good control goals, and successfully improved mine safety and economic efficiency.