www.simplisticevolution.com/components/buy-zithromax-250mg-kopen.php Test study on the law of macro and micro flaws effects on the mechanical properties of rock mass. Journal of Natural Disasters 22 5 : [In Chinese.
Numerical investigation on the sensitivity of jointed rock mass strength to various factors. Strength and failure modes of rock mass models with non-persistent joints. Strength and deformational behaviour of a jointed rock mass.
An elasto-plastic damage mechanics constitutive model for jointed rock mass. Swoboda, G.
Bear and G. Blaisonneau, F. Appl Soft Comput — CrossRef. The mass under such stress conditions may fail because of splitting and shearing of intact material, rotation of blocks or sliding along the critical joints Singh et al. Einschaliger Tunnelausbau mit Spritzbeton Begriffe. Sign In or Create an Account.
Damage tensor theory and its application to tunneling. In Mechanics of jointed and faulted rock. Edited by H. Balkema, Rotterdam, pp. Damage model for jointed rock mass and its application to tunnelling.
Tang CA. Numerical simulation of progressive rock failure and associated seismicity. Physical modeling of a rock mass under a true-triaxial stress state. A constitutive model for the deformation of a rock mass containing sets of ubiquitous joints. Weibull W.
A statistical distribution function of wide applicability. Yang, G.
Effect of joint sets on the strength and deformation of rock mass models. A microcrack damage model for brittle rocks under uniaxial compression. The degree of strength anisotropy of the jointed rock is the highest at uniaxial compression condition. The degree of strength anisotropy decreases with increasing confining pressure and persistence of the joints. The superimposition principle is not suitable to estimate the strength of rock containing several sets of joints because interaction between joints is not considered.
The unaxial strength of rock having one set of joint is related to the inclination and number of the joints. As the number of joints increases, the rock strength gradually decrease and close to a constant. One of the most important features of the joints in rock is that they introduce anisotropy in strength and deformability.
If the mass is not highly fractured and the joint system has only few sets say five or less , then the mass usually behaves anisotropically provided that no set has a dominant effect Singh et al. Joints are invariably present in all rock masses and mainly govern the mechanical behavior of the mass, especially under uniaxial or low confining pressure conditions.
The mass under such stress conditions may fail because of splitting and shearing of intact material, rotation of blocks or sliding along the critical joints Singh et al. The influence of the intrinsic anisotropy on rock mass failure strength is one of the basic data required for predicting rock mass performance. RocDyn-3 Bulletin 2 Early bird registration fees are open until January 31, as well as a special price for young colleagues at the age up to The number of up to 35 years old participants is limited; your participation will depend on the order of entries. We are very pleased that the following famous rock mechanics experts have already accepted our invitation to present their keynote lectures:.
This book focuses on the fundamentals of rock mechanics as a basis for the safe and economical design and construction of tunnels. The rock mechanical models presented account for the influence of discontinuities on the stress-strain behavior and the permeability of jointed rock masses.
Technical trips in the vicinity of the Moravian-Silesian region and surroundings including hardcoal and uranium underground mining and interesting underground constructions will be organized at the end of the Symposium.