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Keywords: frequency
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Proceedings Papers

Paper presented at the ISRM International Symposium – EUROCK 2021, September 21–24, 2021
Paper Number: ISRM-EUROCK-2021-097
... Value 49 0.21 2,700 19.8 53 5 8.4 30.4 17.80 0.21 2700 49 4.9 31 Unit GPa - kg/m3 MPa MPa J/m2 GPa kg/m3 GPa GPa Table 2: Modelling parameters used in FEM/DEM model. Parameter Global Contact Damping Top Frequency Damping Rigid Body Motion Damping Contact Field Search Zone Factor of Critical Time...
Proceedings Papers

Paper presented at the ISRM International Symposium – EUROCK 2021, September 21–24, 2021
Paper Number: ISRM-EUROCK-2021-069
... engineering frequency graph ultrasonic non-destructive digital indicating tester environmental science 833 amplitude geologist limestone crystallisation practice iop publishing iop conf theory procedure geotron instrument pundit Mechanics and Rock Engineering, from Theory to Practice IOP...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-092
... Design paulatto borehole Reservoir Characterization Upstream Oil & Gas criteria evaluation permeability test fracture flow in porous media Fluid Dynamics sune carstensen procedia engineering 191 Copenhagen Limestone upper copenhagen limestone hydraulic fracturing frequency enrico...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-064
... into a single instance. In prior research the existence of the strong relation between PPV and damage to structures has been well established. Besides PPV, the frequency is one of the most important factors controlling the response of structures. This paper presents a case history of Olympic Stadium renovation...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-159
... stability of the rock bolt. Accordingly, authors developed the system device using ultrasonic waves with different frequency levels, which can detect and display small reflective signals in order to evaluate the extent of mortar filling. In this paper, a basic idea to evaluate the mortar filling quality...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-205
..., – Maintain and protect the struts of walls during the blasting. risk management frequency rock slab Upstream Oil & Gas subway station urban environment diaphragm wall concrete diaphragm wall ground transportation Densely alah station diameter executive schedule hydraulic rock...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-199
... frequencies of the investigated volume. Ground motion at these frequencies was found to be controlled by the main fractures observed at the site and numerical modelling is currently under development for geomechanical and modal analysis of the site. Both spectral analysis and cross-correlation of seismic...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-181
... the time shifting function is considered. The mathematical expressions for the particle velocity on the ground surface are subsequently deduced. Finally, parametric studies are carried out, which includes the influences of fault stiffness, the incident angle and the frequency of incident waves on the peak...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-008
... a discontinuous approach must be utilized. This approach can be extended to masonry structures, so as to find by means of numerical analysis the peak ground acceleration and frequency at which the historic monument is most vulnerable and to predict the anticipated failure modes. The numerical, discrete element...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-105
... topography. The rock slope is subjected to several harmonic signals with variable frequency and amplitude, and the slope response is evaluated. 1 INTRODUCTION Subduction of the Nazca plate under the South American plate is responsible of numerous earthquakes due to the stress accumulation and relief...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-129
... to represent site effect around them. The results of FFT analyses showed that natural frequency from field measurement ranges between 5 Hz and 10 Hz. The authors first clarify the frequency characteristics of the quarries with continuous monitoring. Then, the authors consider the influence to seismic wave on 2...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-148
... is explicit in that the kinematic state can be advanced using known values from previous increment. Explicit integration is conditionally stable, and is bounded with the following limits t 2 (4) in which is the maximum frequency of the system. Abaqus/Explicit uses an adaptive algorithm to determine...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-184
...). Studies have shown a good correlation between the landslides density and the areas of strongest ground motion, while their frequency declines on moving away from the epicenter (Meunier et al. 2007). Sepulveda et al. (2005) studied the rock slope failure due to topographic amplification of strong ground...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-131
... on carbide metal and polycrystalline diamond cutting tools with geometrically defined cutting edges. The ultrasonic frequency was maintained at 20 kHz. Different oscillation amplitudes up to 25 µm were applied to reduce process forces in comparison to the conventional machining. The observation...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-158
... the suitability of geophones to detect ground vibration caused by rock- falls, b) investigate the spacing between geophones, c) evaluate the applicability of empirical equations to determine the energy decay rate, and d) determine the frequency range generated by rockfalls. A number of multi-parametric...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-156
... and composed of numerous alternating movements with different frequencies and amplitudes move in cycles (Sashourin 2001). Upstream Oil & Gas kazchrome donskoy ore mining Reservoir Characterization frequency movement process metals & mining structural geology displacement amplitude...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-246
... monitoring program. The application of new nanotechnolo- gies in the geotechnical and rock mechanic fields has increased the amount of acquired information both in space and frequency. Along with the awaited introduction in the EC7 of specific considerations regarding geo- structural characterization...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-018
...:) involved in the distinct techniques. Other authors (Kolesnikov, 2009, Ciccotti & Mulargia, 2004) consider that the static test is a dynamic test at a very low frequency, and they highlight the nonlinear elastic response to different associated frequencies (f).Kolesnikov (2009) uses the Kjartansson...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2014, May 27–29, 2014
Paper Number: ISRM-EUROCK-2014-007
... sandstones and a quartzite M. Alber Engineering Geology/Rock Engineering, Ruhr-University Bochum, Bochum, Germany ABSTRACT: Dynamic moduli of rocks are higher than their static moduli. The difference is attributed to different frequencies, strain and stress amplitudes when conducting static and dynamic...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2013, October 23–26, 2013
Paper Number: ISRM-EUROCK-2013-129
... families of joints and the surface of the gallery, both the problems of identification and support have also been studied in considerable depth and solutions found (González et al. 2005). frequency information operation rock mass metals & mining wavelength environmental parameter...

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