岩爆的深度判定法及应用

Depth Judgement Method of Rockburst and Its Application

工程实践中岩爆的发生存在一个临界深度。若能根据工程开挖的深度对岩爆的等级进行划分,那么对实际工程中岩爆的预测和控制将具有重要的作用。在国内外各种岩爆判定因子的基础上,分析得到了岩爆判定因子与工程开挖深度的关系。研究了地应力与岩体赋存深度的关系,结合弹塑性力学得到了三种岩爆深度判别公式。根据初始公式对岩爆的判定,在得到的公式中确定了不同深度下岩爆的等级。实例分析结果表明:三种岩爆深度判别公式具有较好的实用性和有效性。

There is a critical depth for rock burst in the engi- neering practice. If the classification of rockburst can be di vided by the excavation depth of engineering, it will have the great significance to the prediction and control of rockburst in actual project. Based on the rockburst judgement factors used at home and abroad, the relationship between the judgement factors and the excavation depth of engineering is obtained by analysis. The relationship between geostress and the occurrence depth of rockmass was investigated. Accord- ing to the theory of elastic-plastic mechanics, three formulas of rock burst depth criterion have been given. The classifica- tion of rockburst was made in these formulas to keep in ac- cordance with initial formula. Experiment results showed that these formulas have good practicality and effectiveness.