高孔隙岩石局部变形带的简化模型  

A simpified model of local deformation band for high porous rock

作　　者：席道瑛[1] 徐松林[2] 王鑫[1] 宛新林[3] 

机构地区：[1]中国科学技术大学蒙城地球物理国家野外观测站地球和空间科学学院,合肥230026 [2]中国科学技术大学中国科学院材料的力学行为和设计重点实验室,合肥230027 [3]安徽建筑大学土木工程学院,合肥230022

出　　处：《地球物理学进展》2015年第4期1935-1940,共6页Progress in Geophysics

基　　金：国家自然科学基金资助项目(11472264;11272304;40874093)资助

摘　　要：用屈服函数和势能函数的偏导数重新定义了岩石的局部化变形带的判定条件,给出了新的局部化变形条件及临界模量.通过对Rudnicki和Rice(1975)为研究剪切带发生条件而建立的本构关系加以改进并放宽限定条件,提出了用四分之一椭圆帽盖模型以及与之相切的圆来简化势能函数,获得了简化模型,并在此简化模型基础上,取得了变形带发生的判定条件以及简化后的临界模量.同时还给出了简化理论模型的结果;通过压缩带和剪切带的产生顺序以及判定条件验证了简化模型的正确性,并与Issen等(2001)的理论模型进行了对比,讨论了简化模型的优越性以及在三轴对称压缩试验中的实用性.Using the partial derivative of yield function and potential function redefine the criterion of rock deformation localization band,the new local deformation condition and critical modulus are given.Through the improvement and relax restrictions on constitutive relation which are founded by Rudnicki and Rice（1975）to study the shear bands occurring conditions,proposed to use 1/4elliptical cap model and the tangent circles to simplify the potential energy function,obtained a simplified model,and on the based of this simplified model,gain the determinant condition of deformation belt occur and the simplified critical modulus.At the same time also gives the simplified theoretical model results;By the generating sequential of compression and shear zone and determination conditions verify the correctness of the simplified model,compared with the theoretical model of Issen and Rudnicki（2001）,discussed the superiority of the simplified model and the utility in the three axisymmetric compression tests.

关 键 词：高孔隙岩石 局部变形带 简化模型 椭圆帽盖模型 

分 类 号：P631[天文地球—地质矿产勘探] P313[天文地球—地质学]