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Keywords: calculation
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Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2020, June 14–19, 2020
Paper Number: ISRM-EUROCK-2020-059
... in the model, and its hydraulic properties are back-calculated using the measurements. Assuming that there are no changes in the joint hydraulic apertures due to the tunnel excavation, the maximum groundwater pressure immediately behind the SCL is simulated to be approximately 470 kPa. This is lower than...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-035
... on the analysis of a digital surface model. This paper proposes a method to identify discontinuity sets in a point cloud and calculate the spacing of the sets. The discontinuity sets are semi-automatically identified with the open-source software DSE (Discontinuity Set Extractor). The program analyzes the density...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-040
... profile of the working and the applied technology of driving using road headers, separate roof bolting in combination with welded meshes is used to ensure the stability. The applied methods of dimensioning separate roof bolting as well as the methods of calculating the stable pillars between the mining...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-007
... and geotechnical analyses within the project conducted by Poltegor-Institute. The calculation procedure enabled determination of slope stability on the design of excavation and spoil dump. It included 21 analyses using Flac v.7 of which 14 regarded the slopes of the pit, 6 the slopes of the external spoil dump...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-100
... mass and the mechanical properties of rocks along the well trajectory are used for this purpose. The article presents numerical simulations of changes of the rock mass state around a directional well. The calculations were conducted with various material models of rock: the linear-elastic model...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-075
... & Gas Coal Basin input data Calculation Parameter thermal model metals & mining thermal field expert system rock mass Czech part calculation carboniferous rock mass vlastimil kajzar procedia engineering 191 temperature value temperature field software Procedia Engineering 191...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-114
... the some level of PPV, an important increase in the calculated load on the arch steel support were observed in the stress concentration zones. These results are in good correlation with numerous cases of rockbursts occurred in the Polish mines. In our opinion, continuous measurement and controlling...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-001
... output for their designs on the jointed rock mass which largely behaves as a discontinuum. Therefore, as excavations in jointed rock masses and the use of DEM become more widespread, methods for interpretation and auditing become more urgent. Artificial Intelligence calculation jointed roof beam...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-077
... of calculation, lumped parameter model or called a MDOF (multi-degree-of-freedom) model is developed. In this type of model, the drillstring is regarded as a linear system with series of rigid masses connected by massless elastic springs. The Newtonian approach and the energy variational approach (Hamilton's...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-123
... geomechanics drilling operation Reservoir Characterization Upstream Oil & Gas ground type fault rock calculation inner lining Austria Directional Drilling Berlin geotechnical design parameter grautschenhof discontinuity lining interpretation tunnel geotechnical design Design Methodology...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-104
... of the parameters calculated and estimated in @Risk7 using Monte Carlo method for the sampling process and Kolmogorov-Smirnov for the fitting process. Ultimately, from @Risk7 calculation resulted that all parameters have a normal distribution function. Furthermore, the stability analyses using Geotudio2007 has FS...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-176
... clouds detecting the number of discontinuity sets, classifying each point with its discontinuity set and plane equation and calculating their normal spacing; and SMRTool calculates the geo-mechanical quality of a rock slope by means of the Slope Mass Rating (SMR) index. In order to illustrate the use...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-147
... state in the vicinity of gas storage in salt caverns under consideration of thermo-mechanical coupled calculations will be presented. Numerical models are created to take into account the essential influence of the volume and depth of the cavern. Furthermore time-dependent, thermo-mechanical coupled...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-173
... ABSTRACT: The fractures geometrical characteristics can be calculated by various sampling methods in 1 dimension (1D) & 2 dimensions (2D). The Discrete Fracture Network (DFN) simulation results show some of the equations are suitable for calculation of mean trace length and the difference...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-169
... during the construction phase of the Bátaapáti radioactive waste repository. Examinations of the values determined on-site gave significantly different results. Different correlations were determined between the calculated GSI values. 1 INTRODUCTION The Geological Strength Index (GSI ) represents...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-195
... monitoring data was processed by the author and the results are presented in this paper in form graphical presentations derived from tables of calculations. The graphs of subsidence profile, tilt profile and major and minor principal strains profiles are also provided. The interpretations and comments about...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-188
... rock mass. There is no well-known method to calculate tunnel stability of tunnel face during penetration of a fractured zone. The relevance of the hand calculation was verified with the 3D finite difference model, where the exact tunnel geometry, face support and fracture zone is directly considered...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-169
... Abstract Stress is an important parameter in rock mechanics. As it is represented by a second-order tensor, the usual statistical methods for scalars and vectors strictly are not applicable. As a result, the correct method for calculation of a mean stress tensor is still not clear. Here...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-120
... finite difference time domain (FDTD) calculation. In a subsequent thermo-mechanical finite element (FE) simulation the stresses generated by 15 s heating with 25 kW are obtained. High stresses on the boundaries of the microwave absorbing phase exceeding the tensile strength are observed. Finally...
Proceedings Papers

Paper presented at the ISRM Regional Symposium - EUROCK 2015, October 7–10, 2015
Paper Number: ISRM-EUROCK-2015-140
... hole. Nonetheless, information provided by some of the drillings about depth and geometry of this zone let the thickness of tuffite reasonably assume in the range of 20 - 50 m. strength powerhouse construction pit tuffite Reservoir Characterization calculation fine tuffite rock mass...

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