... ABSTRACT: The segmental tunnel lining of Koralmtunnel in Austria is equipped with state-of-the-art structural health monitoring methods. Vibrating wire strain gauges measure histories of normal strains at specific locations along the steel reinforcement of precast concrete tubbings...

... ABSTRACT: Conventional borehole tensor strainmeters (BTSM) based on the measurement of inner-diameter changes of strainmeters by four capacitance gauges had been developed to measure three strain-components in the horizontal plane. The other three strain components are also important...

... that the tunnel itself is a large borehole, stress measurements by BWS were obtained by gluing strain gauges directly to the tunnel wall and releasing stress only in that part. This BWS is a very unique and challenging method. Interestingly, the stress states measured by two different methods were in good...

... ABSTRACT: Rebar-type rock bolts of 22 mm and a length of 600 mm are instrumented with four resistance strain gauges along the length. A total of 450 mm bolt lengths is embedded with resin grouted inside a cement mortar cast cylindrical sample of diameter 250 mm. Strain gauges are placed...

... characterization tensile strength gauge geological science geological engineering packulak rock mechanic department anisotropic material accumulation 15th ISRM Congress 2023 & 72nd Geomechanics Colloquium. Schubert & Kluckner (eds.) © ÖGG Application of Digital Image Correlation for Analysis...

... gauge Abstract The laboratory equipment is commonly expensive, making its acquisition diff-cult for laboratories and universities with low budgets. This problem could be solved with the use of open source software and hardware. Last decade, different initiatives were born that promulgate the use...

... specimen isrm orientation strength reservoir geomechanics posiva oy microcrack left upstream oil & gas sensor granitic pegmatoid foliation gauge specimen axis porosity s-wave loading Rock Mechanics for Natural Resources and Infrastructure Development Fontoura, Rocca & Pavón Mendoza...

... precursor uniaxial compression golosov destruction information management deformation anomaly geomechanics displacement guzev reservoir characterization increment lateral deformation gauge ksendzenko deformation makarov loading rock mechanic mechanism Abstract...

... Abstract The strain gauge probes of different construction are typically used for determination of stress state of rock mass. The modified overcoring method with the original name Compact Conical ended Borehole Overcoring method (CCBO) for rock mass stress measurement is now commonly used...

.... The calculation of scattering waves around the two-ring borehole by wave function expansion gives diameter change of the borehole. It is shown that frequency responses of borehole strainmeter for different gauge combinations are mainly determined by mechanical parameters of rocks and the high frequency bandwidth...

... characterization rock mechanic requirement deviation perpendicularity engineering gauge suggested method university commission specimen strength poisson diameter axis isrm suggested method specimen 16 Rock Mechanics for Natural Resources and Infrastructure Development Fontoura, Rocca & Pavón...

... or geocells (Heymann et al., 2010; Maegawa et al., 2011). reservoir characterization bund 1 accelerometer bund 2 penetration geogrid steel mesh rockfall protection embankment plastification bund reinforcement dimension instrumentation gauge uniaxial geogrid upstream oil & gas...

... equation specimen gauge loading angle anisotropy ABSTRACT For the purpose of determining orthotropic anisotropy in deformability of rocks, a procedure of loading test and analysis has been established. Axial loading tests in 6 directions of X, Y, Z, YZ, ZX and XY are good enough to determine...

... stress cell unrecognized anisotropy of the rock (Martin & Christiansson, 1991) heterogeneity of the rock stress or strain induced damage of a pilot hole wall or core Reservoir Characterization orientation strain gauge gauge Upstream Oil & Gas reservoir geomechanics...

... of core disking was observed during overcoring in the measurement. In stress measurements by the stress relief method under high rock stress, a phenomenon of core disking is sometimes observed during overcoring. In the case that the core disking was observed. Health & Medicine strain gauge...

... Technique, the Hydraulic Fracturing Method and t~ 'Acoustic '. l, Emission Method using cue specimens. Outline of the four ! methods is u follows. . j, , ' .The Borehole Deformation Method hu been applied using If the eight-element borehole deformation gauge (Kanagawa et al.; . 1986). The complete state...

... metals & mining hemispherical-ended borehole technique Rock stress stress measurement major gold vein reservoir geomechanics stress determination gauge rock temperature initial stress hot rock coefficient Reservoir Characterization initial rock temperature thermal expansion...

... for the information processing aimed in the direction of correct band fil- tration for the channel-wave resolution on the gauge in the coal seam, for automated processing at the first arrival of the waves and their energy, mainly for unique determi- nation of the wave types and velocity. The main goal of software...

... gauged uniaxial tests are not greatly affected by either foliation orientation or by the positioning of the deformation measuring points relative to it. However, poisson's ratio values appear to be affected by these factors. Recommendations are made for the placing of strain gauges in positions which...

.... Reservoir Characterization strength tension test procedure Upstream Oil & Gas quarter bridge side resistance structural geology axial capacity test pile load cell main pile test result diameter pile pile head gauge grouted section loading steel pile grouted rock mass Testing...