... method underground excavation principal stress magnitude A place within the rock mass remains supporting stresses in a state of equilibrium; when the excavation is carried out, an empty space is produced, redistributing the stresses and generating a new state of stresses. In some cases...

... & mining Arenal stability analysis element model operation gold mineralization monzonite excavation Reservoir Characterization Upstream Oil & Gas numerical method stability geometry underground excavation hangingwall instability mineralization pillar safety deposit Rock Mechanics...

... ABSTRACT: Following a mention of the first calculation methods introduced in the mid-19th century for stress analysis of tunnels and underground excavations, the transition from analytical solutions and experimental investigations to numerical methods, in the second half of the 20th century...

...Rock Mechanics and Rock Engineering: From the Past to the Future Ulusay et al. (Eds) © 2016 Taylor & Francis Group, London, ISBN 978-1-138-03265-1 Modeling unstable rock failures in underground excavations E.C. Poeck, Z. Khademian, R. Garvey & U. Ozbay Colorado School of Mines, Golden, Colorado...

... orientation mining activity discontinuity point load test rock mass tunnel Indonesia small-scale mining underground excavation accident mining Rock Mechanics for Resources, Energy and Environment Kwas´niewski & ydz ba (eds) © 2013 Taylor & Francis Group, London, ISBN 978-1-138-00080-3...

... from uniaxial compressive strength tests. 1 INTRODUCTION Underground excavations in rock are manufactured either by drilling and blasting or by mechanical methods using road headers or tunnel boring machines. Both methods employs tools which interact with the rock and this interaction leads...

... field equation different horizontal stress manouchehrian 2008 excavation vertical stress ratio underground excavation Rock Mechanics in Civil and Environmental Engineering Zhao, Labiouse, Dudt & Mathier (eds) © 2010 Taylor & Francis Group, London, ISBN 978-0-415-58654-2 Investigating...

... approaches might assist in understanding and controlling swelling. Recent developments and implications of practical importance are highlighted, particularly with respect to the selection of strength parameters for support design of underground excavations in highly stressed rock. Several case examples...

... integrity displacement measurement result Upstream Oil & Gas tunnel tube Wellbore Design back analysis support system element excavation rockb deformeter tunnel zone sediment Reservoir Characterization limestone Engineering kova�ević underground excavation konjsko tunnel back...

... geomechanical classification modification database machine learning Upstream Oil & Gas Artificial Intelligence classification correlation classification result structural geology clastic rock mass geological situation underground excavation RMR exploration work Bieniawski rock mass...

... hydraulic fracturing orientation Upstream Oil & Gas complex reservoir mean error mapping excavation scanline fracture characterization underground excavation trace map fracture trace map digital face mapping photograph metals & mining rock exposure rock face salt...

...MANAGEMENT PROCEDURES FOR AN UNDERGROUND EXCA VATION OF MARBLE COSTA E SILV A,.M. MA TILDE (1ST, Lisbon, Portugal,pcmatild@a!fa.ist.utl.pt) FALCAO NEVES, A. PAULA (1ST, Lisbon, Portugal,p!alcaolleves@popsrv.ist.utl.pt) ABSTRACT For marble underground excavation it is important to develop...

... requiring the use of powerful computer simulation tools, in order to predict rock mass response around slopes, open pits and underground excavations in rock. Recently, ornamental marble quarries in Portugal are evolving to underground exploitations, in order to reduce related costs and environmental impacts...

... assessment could be designed without inherited legacies as parameters related to underground excavations. In the past classification system calculations should be simple as these were supposed to be done on site in the field. With the general availability of palmtop computers this restriction...

... be the case for a slope support measure as shown in Figure 7a. Stability analyses for underground excavations, however, should be carried out using a numerical analysis method such as the finite element method (Wittke 2(00), since in this case the three-dimensional load transfer is influenced by the sequence...

... ABSTRACT: The application of risk assessment and management techniques to the design and construction of underground excavations is examined and a comprehensive approach proposed. The approach is based on experience from other industries, the authors own research and practice and case examples...

... Characterization classification category geometry sill pillar underground excavation Eurock '96, Barla (ed.) © 1996Balkema, Rotterdam. ISBN 90 5410 843 6 Empirical assessment of failure behaviour of stopes and sill pillars in Swedish cot-and-fill mines Evaluation empirique des caracteristiques de rupture...

... Ausbaukostenminimisierung mit einer gleichzeitigen Sicherheitsgewahr beitrug. Wegen der möglichen Anwendbarkeit der Methode auf andere Situationen, wird sie beschrieben und detailliert erlèutert 1. INTRODUCTION Design, selection and installation of supports for underground excavations are not always reliable...

... theory and the stability and support requirements of underground excavations. In fact, many underground excavation designers use the elastic theory predictions as rough guidelines in judging the excavation stability …" If the elastic stress analysis predicts some kind of failure, optimization of design...

... existing shafts and tunnels. Upstream Oil & Gas Reservoir Characterization structural geology strength cavern marl excavation criterion mesh shaft tunnel feasibility programme sandstone rock mass University displacement CERN sequence construction underground excavation...