【摘要】 采用统一强度理论 ,考虑井筒周围岩石的孔隙压力和渗流作用 ,对井筒进行弹塑性分析 ,求出保持井壁稳定的弹性极限载荷和塑性极限载荷的统一解析式。以往基于Mohr Coulomb强度理论和双剪强度理论的解均为该解的特例。所得的统一解可以用于适合不同强度理论的各类岩石材料的极限分析。更多还原

【Abstract】 Based on the unified strength theory, the elastic and plastic analyses, which take account of the effect of pore pressure and seepage on the rock of a wellbore, were proceeded. The unified solutions of the elastic and plastic limit loads for the wellbore stability were also deduced. The solutions in view of Mohr Coulomb strength theory and the twin shear strength theory are all their special cases. The unified solution can be applied for the limit analysis of all kinds of rocks.更多还原