Inter-relationship between joint dilatancy and frictional resistance: impact on fracture behaviour

International Symposium on Geohazards and Geomechanics 2015

地球科学;生态环境科学

Eshiet, Kenneth Imo-Imo^1 ; Sheng, Yong^1

School of Civil Engineering, University of Leeds, Leeds

LS2 9JT, United Kingdom^1

关键词: Fracture behaviour;    Fracturing process;    Frictional resistance;    Inter-relationships;    Joint frictions;    Rock formations;    Rock joint;    Shear behaviour;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/26/1/012053/pdf
DOI  :  10.1088/1755-1315/26/1/012053

学科分类：环境科学（综合）

来源: IOP

【 摘 要 】

Rock joints possess features that alter both the characteristics of rock formations and the fracturing process. Two important properties that govern the shear behaviour and dilatancy behaviour of discontinuities have been analysed in this paper by the discrete element method (DEM). The ability of a frictional joint to suppress fracture growth decreases as the frictional resistance increases; however, the rate and extent of fracturing increases with joint dilatancy. The influence of joint frictional resistance is more dominant at high values and in this range effects of small magnitudes of dilatancy are correspondingly insignificant. At low joint friction the occurrence of even a small amount of dilation increases the severity of the fracturing process. This study highlights the interactions between two main joint properties with the anticipation that the concepts derived here will be useful for predicting fracture behaviour at the subsurface.