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Keywords: experiment
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Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-043
... review of the experiments see e.g. [6] and references therein. Conclusions of those experiments are: increased intermediate principal stress increases the strength of rocks, and that under very high pressures this effect can be substantially suppressed. However, experimental studies through RTE, CTE or...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-019
... measured, including porosity, permeability, and elastic wave velocity. Mechanical characterization was then performed using a combination of uniaxial, tensile, and triaxial experiments on as-collected samples and samples thermally stressed in the laboratory. The obtained results reveal MEGT to have a high...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-087
... Abstract Dynamic shear ruptures (up to intersonic velocities) have been observed in brittle materials from micro to macro scales including earthquakes. Earthquake laboratory experiments have revealed two key features of extreme ruptures: intensive microcracking in the rupture tip and...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-025
... monitored block, were made mechanically to fail. In this experiment attention was paid to the SNS array, which can be able to record the micro- fracturing and the precursory signals of the rock falls and locate them in 3D space. During this experimental phase, 3D multi-time scans were also collected by...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-016
... features. Orientated thin sections were prepared to identify the mineralogical composition. Furthermore, the growing influence of confining pressure from 0.1 to 2.5 MPa on rock strength was analyzed. 1. Introduction Laboratory experiments of rocks were conducted to determine geomechanical properties...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-026
... excavation experiment of coal seam. Then by use of the test, the development law of mining overburden separated strata is studied, and the space-time corresponding rule of the surface subsidence and overburden separated strata is analyzed. And on this basis, we find the relationship between the surface...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-090
... specimen investigation procedia engineering 191 Reservoir Characterization Upstream Oil & Gas rock specimen inner structure high-speed abrasive water jet water jet experiment upper base strength property tensile strength lower base preparation Procedia Engineering 191 ( 2017 ) 703...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-060
... state. The viscosity of supercritical CO 2 (SC-CO 2 ) is one or two order of magnitude smaller than that of normal liquid water. To examine effect of fracturing fluid viscosity on a crack features induced by hydraulic fracturing (HF), Ishida et al. [2, 3] made HF experiments using SC-CO 2 , liquid CO 2...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-110
... discussed in this paper. Upstream Oil & Gas drilling performance bit selection cement cement paste specimen cross flow Reservoir Characterization fundamental drillability experiment waterjet waterjet drilling drilling operation good drilling performance specimen abnormal formation...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-142
... versus experimental time on the abscissa. 1131 Arno Zang et al. / Procedia Engineering 191 ( 2017 ) 1126 1134 Fig. 4. Injection pressure and flow rate (left ordinate) and relative AE magnitude (right ordinate) for two in situ experiments with different fluid- injection schemes: (a) continuous water...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-103
... the experimental study, a 2D mechanical model of the shear experiments was developed using Smoothed Particle Hydrodynamics (SPH), suitable for deformation processes involving very large strains. Numerical results were compared with the experimental data for a better understanding of local deformation...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-089
... Abstract A near field network with 11 acoustic emission (AE) sensors was installed for the in situ underground experiment (Nova project 54–14–1) that took place 410 m below surface in the Äspö Hard Rock Laboratory, Sweden. The acquisition system for the piezoelectrical sensors has been...
Proceedings Papers

Paper presented at the ISRM European Rock Mechanics Symposium - EUROCK 2017, June 20–22, 2017
Paper Number: ISRM-EUROCK-2017-079
... Abstract In this study we analyze the nano- and picoseismicity recorded during the Fatigue Hydraulic Fracturing (FHF) in situ experiment performed in Äspö Hard Rock Laboratory, Sweden. The fracturing experiment composed of six fractures driven by three different water injection schemes...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-046
... fracture toughness results) according to the ISRM sug- gested methods (Ulusay 2014). Details about the rock testing are given in Brenne et al. (2013) and the main results are listed in Table 1. 3 METHODS 3.1 Experimental methods Sleeve frac experiments very similar to the hollow cylinder burst tests from...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-032
... semi-underground structures was been initiated by the authors as a part of an international joint project between Japan and Turkey (Aydan et al. 1999a). This experimental programme has been continued by the authors. Besides uniaxial creep experiments, a series of Brazilian and 3-point bending and...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-014
... at find- ing the criterion that defines realization of different deformation regimes. 2 EXPERIMENTAL METHOD The scheme of our experiments was the classical fric- tional slider-model .The granite block 8 × 8 × 3 cm3 in size slid along the interface under shear load (Fig. 1). The contact gap between...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-126
... residual levels of shear 794 Figure 13. Shear stress-shear load response of the interface of sandy limestone blocks during the multi-stage (step) direct shear experiment. Figure 14. Comparion of shear strength envelope for the interface of sandy limestone blocks with experimental results from the multi...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-099
... with the water, it began to weaken, simulating the rain- induced weakening and deformation of consequent slopes. The geometric and mechanical properties of the consequent slope mass were shown to influence the extent of deformation and the characteristics of fail- ure. Experiments were subsequently...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-166
... water supply from the bottom of a sample, two cases of drying experiments under different boundary conditions are conducted shown in Figure 2 schematically. In the Case 1, the Figure 2. Experimental conditions. (a) Case 1: water immersion, (b) Case 2: no water immersion. Figure 3. Experimental...
Proceedings Papers

Paper presented at the ISRM International Symposium - EUROCK 2016, August 29–31, 2016
Paper Number: ISRM-EUROCK-2016-162
... between the excavation methods. At 2010 the Research Tunnel was expanded to its current size and profile (Fig. 1) for hosting the Posiva's Spalling Experiment (POSE) within the ONK-TKU-3620 (Johansson et al. 2014, Valli et al. 2014). From the ONK-TKU-3620 tunnel, one specific 9 m × 2 m area was...

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