The characteristics of the rock strength and failure under triaxial compressions are theoretically analyzed in detail with the twin shear theory and the results are compared with experimental data.
应用双剪理论对岩石在三轴压缩载荷下的强度和破坏特性进行了理论分析，并将分析结果与已有实验作了对比。
Based on the theory of elasticity and molar-Coulomb strength failure criterion, we proposed the prediction method for hole enlargement ratio in the condition of underbalanced drilling.
基于弹性力学理论及岩石摩尔-库仑强度破坏准则，提出了欠平衡钻井条件下井径扩大率的预测方法。
Through analyzing rock failure due to rock burst in-situ, applying the rock burst strength theory and the stability theory, and using physical modelling experiment, the mathematical model is built.
数学模型是在实地分析岩爆破坏机制基础上，经过岩爆强度理论及稳定理论分析，并经过物理模型试验验证后建立的。
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