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。
Objective: To investigate properties of brachial arterial elasticity of renal failure patients in different stages.
目的：探讨慢性肾功能衰竭患者不同阶段肱动脉弹性功能的特点。
The failure probability of the tunnel support with the same supporting strength will reduce when the elasticity of surrounding rocks reduces.
随着围岩弹性模量的降低，相同支护强度的支护体破坏率越小。
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