Jj. Dong et Yw. Pan, HIERARCHICAL MODEL OF ROUGH ROCK JOINTS BASED ON MICROMECHANICS, International journal of rock mechanics and mining sciences & geomechanics abstracts, 33(2), 1996, pp. 111-123
Citations number
47
Categorie Soggetti
Geochemitry & Geophysics","Mining & Mineral Processing
A rough rock joint model is proposed in this study on the basis of mic
romechanics concepts. In the model, the global behavior of a rough joi
nt depends on the microfeatures of the contact planes on the joint. Th
e contact mechanics on contact planes controls the mechanical behavior
of the joint via a homogenization process. Also, the complex mechanic
al behavior of a joint is associated with simple microfeatures of the
joint, including the frictional properties and the structure of contac
t planes. To capture the feature of scale dependency of joint roughnes
s, a hierarchical representation of a joint profile is proposed in the
form of a multi-level-asperity model. Moreover, the constitutive rela
tion of the multi-level-asperity model is derived through a recursive
homogenization process. The proposed model's framework is general and
systematic. Furthermore, major deformation mechanisms of joint asperit
ies, i.e. interlocking, wearing, shearing-off sliding, separation and
degradation, are taken into account.