During the process of blasting excavation of deep rock masses under high in situ stress, energy produced by the explosive and the strain energy released by rock mass excavation constitute the energy source of vibration. However, in traditional Sadov’s empirical formula, the energy produced by explosive explosion is only considered which makes the error higher when it is used to predict the blasting-induced vibration peak under the condition of high in situ stress. In this study, energy transformation and distribution mechanisms caused by excavation of deep rock masses were analyzed at first. Then, a prediction model of vibration peak based on the principle of energy balance was established by dimension analysis. Finally, the proposed model was trained and tested with the vibration data monitored during the blasting excavation of deep buried tunnel in Jinping II hydropower station. The result shows that compared with the traditional prediction model, the proposed model has higher fitting correlation coefficient and lower root-mean-square error, which can be better applied to the prediction of vibration induced by blasting excavation of deep rock masses under high in situ stress.

中文翻译：

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预测高地应力下深部岩体爆破开挖引起的振动的模型

在高地应力作用下的深部岩体爆破开挖过程中，炸药产生的能量和岩体开挖释放的应变能构成了振动的能量来源。但是，在传统的萨多夫经验公式中，仅考虑爆炸爆炸产生的能量，当用于预测高地应力条件下的爆破振动峰值时，误差会更高。本文首先对深部岩体开挖引起的能量转换和分布机理进行了分析。然后，通过尺寸分析，建立了基于能量平衡原理的振动峰值预测模型。最后，在锦屏二级水电站深埋隧洞爆破开挖过程中，利用监测的振动数据对模型进行了训练和测试。结果表明，与传统的预测模型相比，该模型具有较高的拟合相关系数和较低的均方根误差，可较好地应用于高地深岩体爆破开挖引起的振动预测中。强调。