.... Barton shotcrete landslide tunnel Grimstad Norway bhasin rock mass quality Upstream Oil & Gas feasibility study Himalaya rock mass classification Reservoir Characterization road tunnel Rock Engineering Challenge construction landslide area ARMA 19 1616 Overcoming rock engineering...

... of the mining horizon near the south portal and intersected the surface along the southeast edge of the pillar collapse Figure 3. Prominent N60°W striking joint intersecting a pillar south of the collapsed area. 2.3. Rock Strength and Rock Mass Classification Rock strength testing and rock mass classification...

... strength formula discontinuity rock mass classification design chart pillar design failure mechanism ARMA 17-009 Improving Hard Rock Pillar Design by Including Rock Mass Classification and Failure Mechanisms Oke, Jeffrey MDEng Inc., Kingston, Ontario, Canada Esterhuizen, Gabriel S. NIOSH-Pittsburgh...

... faults, joints and shear zones. The host rock is dominantly pyroxenite which is a competent rock. Excavations that need to be supported include stopes, development tunnels, drifts and shafts. Rock mass classification methods were used in a bid to quantify the quality of the rock mass. Geotechnical data...

... Abstract: Conventional methods for rock mass classification such as cell mapping and scanline survey have limitation because of human bias and hazard to access rock wall. Development of data collection methods utilizing hyperspectral imagery and terrestrial laser scanning enables engineers...

... Abstract: Authors analyzed four geomechanical hypotheses used in rock mass classifications (RMC): hypothesis No.1: the loads on rigid support for the equal criteria of the RMC are equal; hypothesis No.2: scale factor and rock mass mechanical characteristics are the same for different sizes...

... for the raisebored tunnel. Principles of rock mass classification are utilized in the project. Rock mass classification (RMC) plays a pivotal role in the design of excavations in both civil and mining engineering. It is a quick and an uncomplicated powerful tool to assess stability of excavations as well...

... shaft hole single excavation geology fault zone upstream oil & gas turquoise ridge basalt rock mass rating reservoir geomechanics shaft rock mass classification ARMA 15-690 A case study for Northern Nevada single excavation! Shaft- Technical Limit: width and depth? Rai, A. R., *Howell...

... process. Uncertainties are inaccuracy in the geological survey before construction start, many assumptions in the design of tunnel supports, difference between design and constructed result and so on. Especially rock mass classification is important, because a design of tunnel supports and tunneling...

... and moisture sensitive rocks. metals & mining underground information roof fall US government information Reservoir Characterization strength drill core information application intersection span coal field CMRR roof rating Illinois Basin rock mass classification bolt length reservoir...

... methodology. It is in this context that the rock mass classifications have gained tremendous significance and are indeed one of the most significant developments in rock engineering and engineering geology during the middle and later half of 20th century. Terzaghi’s [1] rock load concept shall always have...

... will cause interruptions of the mine productions as well as safety problems which could not be acceptable for economical and safety reasons. The main gallery is 2400 m long, 5 m high and 5 wide in horseshoe shape and driven in two main rock formations that are limestone and dacite. Rock mass classifications...

... quality Reservoir Characterization strength reduction factor study area discontinuity Upstream Oil & Gas cross-hole ws reduction factor ultrasonic ws rock mass classification unweathered sandstone Navajo Sandstone perpendicular rock mass quality ARMA 10-504 Seismic Wavespeed used...

... classification provides the basis for selection of a support system and geotechnical analysis in mining and civil engineering projects. It may also be used in project contracts to determine a rate for excavation cost. Therefore, the accuracy of geological mapping and rock mass classification has impacts...

... transformer cavern soleyman power house cavern rock support joint factor excavation rock mass rock mass classification media continuum media Ramamurthy ARMA/USRMS 06-904 Continuum Modeling of Masjed E Soleyman Power House Cavern Using an Empirical Continuum Media Bagheri. M PhD Candidate...

... paperwork during characterization and subsequent rock mass classification, by providing a useful tool.The PDA data acquisition tool can be used with either of the two systems, Q or RMR (and SMR) and provide a user friendlyenvironment for quick and safe data recording. In addition technological features...

... ABSTRACT: The assessment of strength of rock masses is a key element for the analysis of many rock excavations, both open pit and underground. There are attempts to assess the rock mass strength using Rock Mass Classification, the most popular one relates the Hoek-Brown Failure Criteria...

... ABSTRACT: Another approach to an engineering rock mass classification system development is suggested in the report. It is based on the numerical stress analysis of interaction of underground openings and rock masses, using a theory of experiment?s design. Q-system parameters are used for rock...

... INTRODUCTION ABSTRACT: The paper discusses the problem of quantitative rock mass classification used for design and construction of tunnels. It is the authors conviction that quantitative classification systems should not be used to determine supports during planning and construction...

... ABSTRACT INTRODUCTION Rock mass classification is one of an engineers most widely used tools for predicting the response of a large scale rock mass to an engineering structure. Classification schemes have two main aims. The first deals with quantifying the actual properties of the rock mass...