نتایج جستجو برای: circular hole rock sample and flac3d
تعداد نتایج: 16885456 فیلتر نتایج به سال:
Introduction: In order to make a hole on the bone cortex, especially, in the tumors of body in order to do biopsy and curettage creating a hole circularly is routinely recommended. In evaluating resources and references for obtaining documentation based on prioritizing circular holes in bending load and pressure, no positive evidence was observed. For this purpose, two methods of software analy...
The discharge of groundwater and the load on lining structure are both significantly impacted by obstruction tunnel drainage system. In this study, fluid–structure interaction model was established based finite difference software FLAC3D. Then, research explored effects symmetric asymmetric blockage in circular drainpipe, transverse drainpipe at pipe joint pore water pressure, displacement stre...
bekenstein and hawking by introducing temperature and every black hole has entropy and using the first law of thermodynamic for black holes showed that this entropy changes with the event horizon surface. bekenstein and hawking entropy equation is valid for the black holes obeying einstein general relativity theory. however, from one side einstein relativity in some cases fails to explain expe...
To study the coupled thermo-hydrologic-geomechanical processes and their influence on gas and nuclide transport in a two phase flow through the porous medium, a coupling of the thermo-hydrodynamic code TOUGH2 and the thermo-mechanic code FLAC3D is described and applied to analyze three dimensional gas, heat and nuclide transport in a repository for disposal of heat generating nuclear waste in a...
The explosion process of explosives in a borehole applies a very high pressure on its surrounding rock media. This process can initiate and propagate rock fractures, and finally, may result in the rock fragmentation. Rock fragmentation is mainly caused by the propagation of inherent pre-existing fractures of the rock mass and also from the extension of the newly formed cracks within the intact ...
The main aim of blasting operations in mining and civil engineering projects is size reduction of the rock-mass. Particle size reduction (P.S.R) affects the efficiency of the loading, haulage and milling equipments. Therefore, prediction of mean fragment size in designing optimum blasting patterns is crucial. In this research, a model is presented for predicting mean fragment size caused by bla...
Abstract According to the latest physical mechanical parameter of rock, crustal stress, section style and support parameter, rock stability intersection EVT- Ventilation Tunnel 2-1 Shaft 2 is analyzed verified through FLAC3D on base actual geology test value stress.
The initiation, propagation, coalescence and failure mode of brittle jointed rock mass influenced by fissure water pressure have always been studied as a hot issue in the society of rock mechanics and engineering. In order to analyze the damage evolution process of jointed rock mass under fracture water pressure, a novel numerical model on the basis of secondary development in fast Lagrangian a...
The use of blasting cost (BC) prediction to achieve optimal fragmentation is necessary in order to control the adverse consequences of blasting such as fly rock, ground vibration, and air blast in open-pit mines. In this research work, BC is predicted through collecting 146 blasting data from six limestone mines in Iran using the artificial neural networks (ANNs), gene expression programming (G...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید