ANISOTROPIC PERMEABILITY EVOLUTION MODEL OF ROCK IN THE PROCESS OF DEFORMATION AND FAILURE  

作　　者：WANG Huan-ling CHU Wei-jiang HE Miao 

机构地区：[1]Key Laboratory of Coastal Disaster and Defence,Ministry of Education,Hohai University,Nanjing 210098,China [2]Hydrochina Huadong Engineering Corporation,Hangzhou 310014,China [3]Jiangsu Transportation Research Institute CO.,LTD,Nanjing 211112,China

出　　处：《Journal of Hydrodynamics》2012年第1期25-31,共7页水动力学研究与进展B辑（英文版）

基　　金：supported by the Natural National Science Foundation of China(Grant Nos.51009052,11172090);the Three Gorge Research Center for Geo-Hazards,the Ministry of Education(Grant No.TGRC201026);the Fundamental Research Funds for the Central Universities(Grant No.2010B02514);the Key Laboratory of Coastal Disasters and Defence of Ministry of Education,Hohai University(Grant No.2010016)

摘　　要：The rock permeability is an important parameter in the studies of seepage and stress coupling.The micro-cracks and pores can initiate and grow on a small scale and coalesce to form large-scale fractures and faults under compressive stresses,which would change the hydraulic conductivity of the rock,and therefore,the rock permeability.The rock permeability is,therefore,closely rela-ted with the micro-cracking growing,coalescence,and macro new fracture formation.This article proposes a conceptual model of rock permeability evolution and a micro kinematics mechanism of micro-cracking on the basis of the basic theory of micromechanics.The applicability of the established model is verified through numerical simulations of in situ tests and laboratory tests.The simu-lation results show that the model can accurately forecast the peak permeability evolution of brittle rock,and can well describe the macro-experimental phenomenon before the peak permeability evolution of brittle rock on a macro-scale.The rock permeability is an important parameter in the studies of seepage and stress coupling.The micro-cracks and pores can initiate and grow on a small scale and coalesce to form large-scale fractures and faults under compressive stresses,which would change the hydraulic conductivity of the rock,and therefore,the rock permeability.The rock permeability is,therefore,closely rela-ted with the micro-cracking growing,coalescence,and macro new fracture formation.This article proposes a conceptual model of rock permeability evolution and a micro kinematics mechanism of micro-cracking on the basis of the basic theory of micromechanics.The applicability of the established model is verified through numerical simulations of in situ tests and laboratory tests.The simu-lation results show that the model can accurately forecast the peak permeability evolution of brittle rock,and can well describe the macro-experimental phenomenon before the peak permeability evolution of brittle rock on a macro-scale.

关 键 词：rock hydraulics MICRO-MECHANICS PERMEABILITY model validation 

分 类 号：O242.23[理学—计算数学] TE319[理学—数学]