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Keywords: gneiss
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Proceedings Papers

Paper presented at the 15th ISRM Congress, October 9–14, 2023
Paper Number: ISRM-15CONGRESS-2023-195
... of 2000 meters above sea level near the village of Kühtai in Sellraintal. The cavern is located within a gneiss formation (biotite-plagioclase gneiss), which is layered in bands and tectonically faulted. As the design progressed, a number of variants were investigated, including the simulation...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-130
... characteristic schistosity nephogram rock mechanic international journal plane mineral composition reservoir geomechanics correlation sandstone layered gneiss reservoir characterization gneiss loading foliation investigation coalescence compression experimental investigation...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-222
... Abstract Mafic gneisses constitute large proportions of the upper and lower continental crust. Gneisses often demonstrate high anisotropy of elastic properties associated with preferred orientations of sheet silicates. Here we study the elastic anisotropy of a sample of Tambo gneiss from...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-204
... in independent directions in one probe position in the borehole so that all values of the stress tensor can be determined. structural geology reservoir characterization gneiss granite reservoir geomechanics ccbo probe deformation plane rock mechanic upstream oil & gas metals & mining...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-232
.... reservoir geomechanics anisotropic plane gneiss study fourier transformation strength roughness perpendicular franklin geomechanics abstract frequency rock mechanic reverberate spherically proportional specimen reservoir characterization graph reduction spike international journal Rock...
Proceedings Papers

Paper presented at the 14th ISRM Congress, September 13–18, 2019
Paper Number: ISRM-14CONGRESS-2019-254
... metals & mining shotcrete formula upstream oil & gas barricade reservoir characterization strength shotcrete application stope equation stability application paste backfill compressive strength reservoir geomechanics wrb gneiss shear strength calculation brazil...
Proceedings Papers

Paper presented at the 12th ISRM Congress, October 16–21, 2011
Paper Number: ISRM-12CONGRESS-2011-119
... of rock mass in the region where is abundant of gneiss during geotechnical investigation, the author propose a new parameter RCL; combined with geological effect of alteration which is very normal in metamorphic rock, the author try to use the photos of the intact core in the field to substitute...
Proceedings Papers

Paper presented at the 10th ISRM Congress, September 8–12, 2003
Paper Number: ISRM-10CONGRESS-2003-174
... anisotropy index strength gneiss inclination Reservoir Characterization Upstream Oil & Gas orientation longitudinal deformation wave velocity criterion MPa foliation plane Hoek anisotropy structural geology anisotropic nature metamorphic rock uniaxial compressive strength...
Proceedings Papers

Paper presented at the 9th ISRM Congress, August 25–28, 1999
Paper Number: ISRM-9CONGRESS-1999-199
...Investigations on fabrics and related mechanical properties of a highly anisotropic gneiss Analyse de la texture et des proprietes rnecaniques associees d'un gneiss fortement anisotrope . Untersuchungen des GefOges und der damit verbundenen mechanischen Eigenschaften eines hochanisotropen Gneisses...
Proceedings Papers

Paper presented at the 9th ISRM Congress, August 25–28, 1999
Paper Number: ISRM-9CONGRESS-1999-134
... Upstream Oil & Gas crack distribution specimen dry condition symmetry elastic anisotropy Reservoir Characterization contribution characteristic compliance orientation tensor gneiss MPa p-wave velocity aspect ratio porosity anisotropy cylindrical specimen moduli triaxial...
Proceedings Papers

Paper presented at the 9th ISRM Congress, August 25–28, 1999
Paper Number: ISRM-9CONGRESS-1999-166
... bien que des tests geophysiques en premier. Les tests ont ete realises par huit sondages au bord du fleuve Pinheiros, dans un massif rocheux de gneiss avec foliation ayant pour objectif la determination de la conductivite hydraulique directionnelle anisotrope dans le volume du massifrocheux. Plus de...
Proceedings Papers

Paper presented at the 7th ISRM Congress, September 16–20, 1991
Paper Number: ISRM-7CONGRESS-1991-295
... metamorlitic rocks forms the host rock for the t~ wells. The main types of rock en- countered are· gneiss, preferentially biotite-silli- manite-gneiss, and anPtibolite. 'rtle foliation of the formation dips in all angles from the vertical to ' the almost horizontal. 1 'l1IE MIR WElL 'nle'~itradeeP n'B...
Proceedings Papers

Paper presented at the 7th ISRM Congress, September 16–20, 1991
Paper Number: ISRM-7CONGRESS-1991-250
... sou tenement gneiss longueur Algiers Subway épaisseur convergence beton projete tunnel une valeur moyenne terrain repartition pratiquement uniforme cintre Travaux ce genre une couche Alger creusement ABSTRACT: In the framework of the underground transportation system...
Proceedings Papers

Paper presented at the 6th ISRM Congress, August 30–September 3, 1987
Paper Number: ISRM-6CONGRESS-1987-202
.... As the works progressed, this information was supplemented with detailed geotechnical explorations providing useful data to the designers.While most of the tunnel passes through competent granite gneisses a portion of the power tunnel is overlaid by a known weak zone - the Mebari Slide Zone made up of fluvio...
Proceedings Papers

Paper presented at the 4th ISRM Congress, September 2–8, 1979
Paper Number: ISRM-4CONGRESS-1979-010
..., showed that for isotropic, magmatic rocks no change in internal friction was observed. The drop in strength for these rocks must therefore be due to other effects as for instance the reduction in surface energy when the rock Specimens are covered with water. For anisotropic, mica-containing gneisses...
Proceedings Papers

Paper presented at the 1st ISRM Congress, September 25–October 1, 1966
Paper Number: ISRM-1CONGRESS-1966-050
... to a gneiss sheared along the stress, as shown also by the author in another way heads of the outcrops of nearly vertical planes of foliation. (Y. Menel, 1962). If the direction of shear stress is perpendicular to the heads, the line [2] is obtained. Line [3] corresponds to the line c) Nevertheless...
Proceedings Papers

Paper presented at the 1st ISRM Congress, September 25–October 1, 1966
Paper Number: ISRM-1CONGRESS-1966-239
... sur gneiss et diabases en different etat de destruction. On a effectue les recherches tant sur les gneiss injectes que sur ceux non-injectes. L'analyse des resultats experimentaux montre: la rationalite d'utilisation de la formule à deux termes avec deux paramètres de calcul de la resistance au...
Proceedings Papers

Paper presented at the 1st ISRM Congress, September 25–October 1, 1966
Paper Number: ISRM-1CONGRESS-1966-051
... is formed mainly of two types of rocks namely of a fine grained biotite gneiss and amphibolite. The two types of rocks show local different in the degree of jointing and intensity of weathering which affected particularly gneiss. In places the gneiss was entirely decomposed to micaceous sandy clay of hard...

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