... greenstone belt reservoir characterization norwegian geotechnical institute integration gallery exposure Rock Mechanics for Natural Resources and Infrastructure Development Fontoura, Rocca & Pavón Mendoza (Eds) © 2020 ISRM, ISBN 978-0-367-42284-4 Q-system classification applied to geotechnical...

... Nexa Recursos Minerais S.A., Vazante, Minas Gerais, Brazil ABSTRACT: The recovery of a mined zone in an underground mine depends on the rock mass behavior related to the excavation opening, changing stress conditions, stope dimensions, opening exposure time as well as other contributions. This case...

... & Barton, 2017) is based on the Q-system for characterizing rock exposures, drill core and tunnels under construction. This was developed from rock tunneling and rock cavern related case records that has been used by engineers across the world for almost 45 years (Barton et al. 1974; Grimstad & Barton...

... month of exposure, one replicate sample of each rock was removed from natural exposure and its grain size distribution was determined. Disintegration ratio (DR), defined as the ratio of the area under the grain size distribution curve of the slaked material for a given rock to the total area...

... exposure to extremely high temperatures. The mechanical properties of the rock under examination are discussed before the results of the thermo-mechanical response of the sandstone are presented and analysed. The range of temperature to which the sandstone has been exposed is 20 C to 1200 C. The physical...

... to high modulus ratios, are generally weaker than the sandstones and strong to very strong. structural geology strength Rock mechanics greywacke rock classification Proc greywacke bedding Reservoir Characterization persistence Waitaki exposure rock mass Hoek greywacke characteristic...

... to the elements. reservoir geomechanics Engineering exposure slope failure Upstream Oil & Gas Rock mechanics consideration Reservoir Characterization frequency rock joint consequence stability rock mass fracture system hydraulic fracturing Hencher discontinuity investigation...

... Rock engineering risk is defined in this paper as a function of the potential ground motion; the vulnerability of the workplace; exposure of people; and a general term - quality of information. The paper describes the development of prototype software that is a combination between an expert...

... AND PROCESS 2.1 Preliminary Study The design of rock slopes in Shropshire is carried out as a continuous process commencing with a project desk study. A walk over survey of the site is included as part of the desk study, and all the exposures within the surrounding area are visited and mapped. The field...

.... During the late 1970's, many underground metalliferous mines in Australia changed from cut and fill to the long-hole open stope mining method. In open stopes, both wall and back exposures are typically much larger than in cut and fill and the success of this bulk mining method is largely dependent...

... test Rock mechanics Investigation Wellbore Design Thickness reservoir geomechanics strength convergence mining plan pillar exposure goderich increment domtar chemical specimen compressive strength deformation diameter flexure equation 7.31 Rock mechanics investigations...

... Summary Photo-interpretation offers a valuable tool for the engineering geologist in analysing the state of fracturing of rock masses. Conventional methods of measuring fractures in situ are often inadequate because the amount of information obtainable depends on available exposures...

... Summary: Several exposures of mica schist rock supporting loadings of 20 tons per sq. ft. (20kg/sq. cm.) show loss of crystalline structure and of elastic properties. When lateral support is removed, serious loss in bearing capacity becomes possible. Records of actual observations...