... characteristics found in the typically complex geological environments of deep mines. Interaction between the stress field and geological structures results in a natural scatter in both stress magnitude and orientation. In some mines, these variations can be significant, and are important to characterize...

... to be the best new parking facility in Europe. reservoir geomechanics Upstream Oil & Gas Raasakka rail transportation orientation Tampere city centre Rock stress Reservoir Characterization ground transportation stability analysis horizontal stress Rock Stress Measurement international...

... Abstract The Deformation Rate Analysis (ORA) technique can be used to estimate the in situ stress from orientated core obtained from exploration or for example from a block of rock extracted from the side of a drive. In the former case it doesn't require underground access and in both cases...

... design. Excavation method is the only factor, among the three, which one can interfere. The stability of an underground opening is not only determined by the quality of the rock mass, but also the state of in-situ stresses. The state of in-situ stresses refers to the magnitude and the orientation...

...-Kuroshima drilling sites in Shikoku Island, southwest Japan. As a preliminary result, the stress orientations determined by the ASR method were reported and compared with the hydraulic fracturing results. The three-dimensional principal stress orientation by the ASR method showed that stress regime...

... the largest induced moment magnitude (M -3). Upstream Oil & Gas nuclear fuel reservoir geomechanics Earthquake orientation target fracture Rock stress repository radiated seismic energy stress drop Forsmark forebulge seismicity fracture stress condition Reservoir Characterization...

.... Reservoir Characterization axial gauge axial strain Upstream Oil & Gas variability instrument reservoir geomechanics variation axial compensation gauge situ stress Symposium orientation borehole axial strain compensation compensation Drilling strain change stress relief circumference...

... results and borehole observation was carried out to make an integrated in-situ stress model at EXP-1 hole. The rock mechanical property data are based on the laboratory experiments on rock core samples extracted from EXP-1. Instead of simply averaging the principal stress and orientation data from...

... and unconsolidated formations. The orientations of the three principal anelastic strains must be the same as the orientations of the three principal stresses applied to the sample. In these experiments, the maximum principal stress must be the vertical stress. Thus, the deviation of the maximum principle stress...

... solely for the stress determination. The redundant data set allows us to determine both of the stress magnitude and orientation in multiple ways, and the validity of rasuHs can be confirmed from their consistency. In order for applying this concept to the stress measurement at deep depth, we have been...

...@pub.taisei.co.jp) Taisei Corporation Japan Tomeo Fujita", Kazuhei Aoyagi", Mitsuyasu Shirase , Makito Nago a Japan Atomic Energy Agency, Japan b Taisei Corporation, Japan ABSTRACT This study addresses and demonstrates an economic support design scheme considering in-situ stress orientation and excavation...

... to change with time in order to maintain equilibrium in the Earth's crust. structural geology Stephansson reservoir geomechanics orientation information borehole Upstream Oil & Gas final rock stress model stress data stress measurement topography horizontal stress determination...

... principal stress orientation Porce III estimation natural stress tensor field Upstream Oil & Gas Rock mechanics rock mass NSTF Rock Stress and Earthquakes Xie (ed.) © 2010 Taylor & Francis Group, London, ISBN 978-0-415-60165-8 Natural stress tensor field at the Porce III hydroelectric...

... in the computed in-situ stress magnitudes and orientation resulted into lowering of the caverns level farther 5m from the surface than the design requirements as per the storage pressure. The paper also briefly outlines the project settings, fundamentals of crude oil storage projects in unlined mined caverns...

... ABSTRACT: To determine three-dimensional stress orientation, we carried anelastic strain recovery (ASR) measurements out using drill core samples taken from a scientific ocean deep drilling project. The lithology of the core samples is mudstone or siltstone with larger porosities ranged from...

... ABSTRACT: Stability and potential failure mode of tunnels and underground rock caverns is directly related to the magnitude and orientation of the in-situ rock stress. In some cases, the high horizontal in-situ stress is essential in maintaining cavern stability, whilst in other cases the high...

... ABSTRACT: This paper introduces one method to detect the fractures induced during the hydraulic fracturing in-situ stress measurement process. This method can detect the hydraulic fracture fairly well, and can define the strike of induced fractures exactly so as to determine the orientation...

... ABSTRACT: Over the past fifteen years, my colleagues and I have developed a suite of techniques for determination of the full stress tensor in arbitrarily-oriented wells and boreholes utilizing observations of non-catastrophic failures of the wellbore wall - compressive failures, drilling...

... and effects of very far origin can be observed. The great changes in stress orientation and in stress state were observed before the biggest earthquakes on the Eurasian lithosphere plate. 1 INTRODUCTION The current main task of seismology seems to be the prediction of earthquakes. Although the modern...

..., and the orientation and magnitude of stresses strongly influence deformation and damage characteristics of surrounding rock mass. Most coal mines in China are operated in underground, and there are a variety of deposition conditions of coal seams. The stress fields in the coal measures are complex and irregular...