... of slope failures. Some researchers suggested that large scale slopes present damage of the rock mass that may be originated by several causes such as excavation technique and quality, and change on the stress trajectories, among others. These effects are increased with the size of the slope...

... SUMMARY: RMi system is a geomechanical classification obtained through the multiplication of the uniaxial compressive strength of intact rock by a reduction factor of strength, named JP, which represents the effects of discontinuities on the strength of rock masses. JP factor is a combination...

... the Rock Mass Rating System (RMR), instead of the original geological feature parameter, to represent the mechanical behavior of the rock mass and addresses a detailed characterization of the block catchment areas. The slope was divided into sectors, and for each sector the RMR and the block falling index...

... during preparation stages require strict controls to avoid future unstable roof stope complications as production blasting is being executed. Reservoir Characterization Pilar goiás desenvolvimento mineral rock mass structural geology Brasil low-angle narrow vein gold mining estimation...

... method maximum deflection stability rock mass equation underground excavation SUMMARY: Some minerals, such as coal and potash, are extracted from stratified sedimentary rocks, usually by underground mining. To safely calculate the excavations, geotechnical studies are required in order...

...-plastic analysis Hoek-Brown yield criteria has been adopted. Three pillar width (W) to diameter (D) ratios (W/D) have been introduced for each of the three considered in situ stress ratios (Ko = 0.5, 1.0 and 1.5) in the rock mass. The tunnels have been considered to be excavated simultaneously. Variation...

... Reservoir Characterization structural geology discontinuity mapping complex reservoir Einstein Artificial Intelligence Upstream Oil & Gas hydraulic fracturing orientation block model rock mass discontinuity analysis trace map discontinuity terrestrial laser point cloud...

.... Many authors include in the category of soft rocks those rock masses that although presenting initially strengths above that upper limit, may be transformed into soft rocks by accelerated weathering, or behave as a weak rock mass with strong deformation due to high degree of jointing, high ground...

... into account a regular sequence. Being in the interface between soil and rock masses, summing the relationship between two different points of view, qualitatively and quantitatively, the understanding of what a soft rock means ends up generating a diversity of classifications and interpretations, without...

... obtained with these criteria were evaluated to verify the compatibility between the two methods. reservoir geomechanics Barton discontinuity Reservoir Characterization strength criteria MPa metals & mining Marino plane Bandis rock mass Hoek sbmr 2014 bandis criteria means...

... measurements, and use numerical models of the rock mass that represent the ground topography and the underground excavations, so that the most likely stress field in the zone of interest for the design of several large underground structures is obtained. KEYWORDS: state of stress, in situ tests, underground...

... Summary Firstly using FLAC3D , rock mass models are established and numerically compressed to analyse the effects of confining stress and dip angle of structural plane, respectively. The results indicates the constructed models are able to exhibit the effect laws that compressive strength...

... Summary This study provides the geomechanical characterization of a rock mass constituted by a mixture of blocks embedded in a sandy silt matrix. This is usually known as a bimrock (block-in-matrix rock; Medley, 1994). The characterization was performed by means of field and laboratory tests...

... Summary This paper concentrates on the applications of a self-developed numerical model, i.e. a rock discontinuous cellular automaton (RDCA), on modeling of the excavation induced mechanical behavior of rock tunnels. In order to simulate the internal boundaries between rock mass and removal...

... structural geology Reservoir Characterization Thickness road tunnel fiber shotcrete sbmr 2014 Nacional basin Argentina failure mode black sandst discontinuity excavation tunnel Upstream Oil & Gas sandstone San Juan rock mass valle fertil sierra valle fertil Rock...

... Summary Construction of mountain roads at western Saudi Arabia is a challenge due to geomorphological constraints, where the rock masses are high-rising, steep slopes, and structurally complex. Al-Hada mountain road of almost 22 km long shows many incidents of rock slope instability...

... Upstream Oil & Gas Barton structural geology strength Reservoir Characterization classification diameter Bieniawski sbmr 2014 discontinuity excavation geomechanical classification system conglomerate rock mass limón sur basin geomechanical classification temporary support...

... Summary Geomechanical classifications in a schist rock mass, Ouro Preto, Minas Gerais were applied in a slope located in Inconfidentes highway, close to urban neighborhood of Ouro Preto. The Rock Mass Rating (RMR), the Rock Mass Quality (Q) and the Rock Mass Index (RMi) were obtained. Two...

... Summary In general, fine-grained sedimentary rocks are characterized by low strength and deformability properties, a condition that worsens in case of being affected by a fault. Due to this, the excavations made in this type of rock mass have high deformation and convergence values. As a case...

... ceiling rock mass support system mining Reservoir Characterization geomechanical study span excavation rate sbmr 2014 Rock Mechanics for Natural Resources and Infrastructure SBMR 2014 Specialized Conference ISRM 09-13 September 2014 © CBMR/ABMS and ISRM, 2014. SBMR 2014 Geomechanical Studies...