nowadays deep excavations are needed for construction of foundation of high rise buildings, providing space for parking and etc. in some cases deep excavations may be constructed in the vicinity of the subway tunnels and causes unpredicted extra displacements and internal forces in tunnel lining of tunnels which were not designed for them and consequently affect serviceability of tunnel. theref...

Abstract The recent development of the TOUGH3 code allows for a faster and more reliable fluid flow simulator. At same time, new versions FLAC3D are released periodically, allowing features execution. In this paper, we present first implementation coupling between FLAC3Dv6/7, maintaining parallel computing capabilities coupled geomechanical codes. We compare newly developed version with analyti...

Purpose. To perform a critical analysis of approaches to determining the stress-strain state "horizontal working – layered massif" system. Obtain informed decisions for applying specific approach case massif. substantiate metric finite element models system massif". Methodology. achieve purpose, peculiarities rock were analyzed. It has been proven that layering is most important structural feat...

The aim of this study was to propose the workflow for integrated analysis 3D geostress and 1D geomechanics an exploration in a new gas field. This will allow problems associated with inaccuracy geomechanical be overcome region obvious anticline/syncline structures. well field mainly included prediction pore pressure calculation mud weight window safe drilling. In general, both method window, nu...

Permeability an important property plays a key role in reservoir performance, numerical simulation, drilling and production planning. In such reservoirs, stress strain alters induced by extraction injection of fluid may substantially change permeability irreversible manner. With regard to this phenomenon, several reservoirs require consider straindependent permeability, order have accurate perf...

in this paper, numerical simulation of frp composite cylinder tubes progressive crushing processes is conducted using ls-dyna. details on the numerical modeling strategy are given and discussed. it is found that triggers introduced in the numerical simulation can effectively model the bevel trigger at the end of the tubular specimens. it is also found that two-layer finite element model based o...

nowadays acoustic emission (ae) testing based on the kaiser effect (ke) is increasingly used to estimate the in-situ stress in laboratories. in this work, this effect is assessed on cylindrical specimens in numerical simulations of the cyclic loadings including loading, unloading, and re-loading cycles using a 3d code called the particle flow code (pfc) based upon the distinct element method. t...