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1-20 of 31
Keywords: wave velocity
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Proceedings Papers
Paper presented at the 13th ISRM International Congress of Rock Mechanics, May 10–13, 2015
Paper Number: ISRM-13CONGRESS-2015-384
... under high in-situ stress conditions, the test about acoustic propagation law on single fracture model of specimen under different pressures and different angles were carried out. The variation of p-wave velocity in fractured rock mass and axial stress-strain relationship in the whole test procedure...
Proceedings Papers
Paper presented at the 13th ISRM International Congress of Rock Mechanics, May 10–13, 2015
Paper Number: ISRM-13CONGRESS-2015-389
... wave velocities. Measurement of travel time velocities and measurement of resonance frequencies are the two methods usually adopted for obtaining wave propagation velocities. Resonant column apparatus measures wave velocities from the resonant frequencies obtained during testing. Depending on the type...
Proceedings Papers
Paper presented at the 13th ISRM International Congress of Rock Mechanics, May 10–13, 2015
Paper Number: ISRM-13CONGRESS-2015-048
... continuously in practice, and choose the optimal assessment indexes and methods. The definitions and physical meanings of wave velocity, b value, and EI-VA value are introduced in this paper. Statistical calculation of the microseismic events in Luomu Mine is finished by using these indexes, then the functions...
Proceedings Papers
Paper presented at the 13th ISRM International Congress of Rock Mechanics, May 10–13, 2015
Paper Number: ISRM-13CONGRESS-2015-085
... Upstream Oil & Gas wave velocity excavation boundary 13th international congress confinement nonlinear velocity model wave propagation Montreal flac specfem2d numerical simulation excavation Reservoir Characterization nonuniform velocity model rock mechanics isrm13 velocity...
Proceedings Papers
Paper presented at the 12th ISRM Congress, October 16–21, 2011
Paper Number: ISRM-12CONGRESS-2011-154
... to the change in temperature. As with the previous figures, there is a distinct change in density over the range 400 800 C. Additionally, there is a 882 Figure 5. Change in P and S wave velocity with temperature. Figure 6. Relation between Vp/Vs and temperature. significant change in density above 1000 C which...
Proceedings Papers
Paper presented at the 12th ISRM Congress, October 16–21, 2011
Paper Number: ISRM-12CONGRESS-2011-101
... ABSTRACT The continuous evolution of damage of a porous limestone was studied during short-term uniaxial compression tests and uniaxial multi-step creep tests. An experimental device, allowing the simultaneous and continuous measurement of five elastic wave velocities in two different...
Proceedings Papers
Paper presented at the 12th ISRM Congress, October 16–21, 2011
Paper Number: ISRM-12CONGRESS-2011-136
... in different directions. First of all, a plate shaped block which is parallel to the bedding plane was prepared. Then, totally 12 core specimens were taken from the block. P wave velocity test and uniaxial compression test were performed for the naturally dried specimens. Another plate shaped block which...
Proceedings Papers
Paper presented at the 12th ISRM Congress, October 16–21, 2011
Paper Number: ISRM-12CONGRESS-2011-242
... of Mines, Golden, CO, US A.I. Mese Geomechanics Engineering & Research, Houston, TX, US ABSTRACT: An experimental investigation have been conducted on the relationship between swelling, swelling pressure, compressional and shear wave velocities, plastic behavior and deformation characteristics of Barnett...
Proceedings Papers
Paper presented at the 12th ISRM Congress, October 16–21, 2011
Paper Number: ISRM-12CONGRESS-2011-225
... particulate media are determined. Reservoir Characterization wave velocity assembly arrangement wave propagation Upstream Oil & Gas particle investigation stress WAVE PROPAGATION waveform Engineering micromechanical model amplitude rock mass frequency mechanics stiffness...
Proceedings Papers
Paper presented at the 11th ISRM Congress, July 9–13, 2007
Paper Number: ISRM-11CONGRESS-2007-114
... Upstream Oil & Gas damage growth plane excavation structural geology deep geological environment experiment creep reservoir geomechanics brittle failure Inada granite differential stress granite time-dependent damage growth Reservoir Characterization wave velocity tertiary...
Proceedings Papers
Paper presented at the 11th ISRM Congress, July 9–13, 2007
Paper Number: ISRM-11CONGRESS-2007-248
... such as density, wave velocity and Young's Modulus decreases with the increase in the temperature applied. An increase in strain rate is obtained from the same pressure with the increase of temperature applied. The effect of high strain rate has shown that with the increase of strain rate, there is an increase...
Proceedings Papers
Paper presented at the 10th ISRM Congress, September 8–12, 2003
Paper Number: ISRM-10CONGRESS-2003-193
... waves in rock is depend on different parameters such as mineralogy, grain size, density, porosity, weathering, stress level, water absorption, water content and temperature. In this research, it is tried to find some relationships between elastic waves velocities and some of the above parameters. Also...
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-1999-264
... are well related to ~ above mentioned factors and decribes rock struc- ture and properties of the rocks (Trojan 1975, Bestynski 1992, Thiel 1995). Seismic wave velocities in the rock formation de- pend on the mechanical properties of the rocks which in tum depend on strength and degree of cracking...
Proceedings Papers
Paper presented at the 9th ISRM Congress, August 25–28, 1999
Paper Number: ISRM-9CONGRESS-1999-254
.... The investigation system consists of a probe attached vibration sensor and super elastic alloy pipe to press it against the bore- hole surface. The distribution of the P wave velocity along a borehole was easily measured. , _ ", J J" RESUME: Cet article presente un expose du systeme compact de prospection...
Proceedings Papers
J.W. Cassie, X.R. Ge, S.W. Bai, D.X. Feng, G.F. Xue, L.X. Xu, K.H. Cheng, Q.G. Yang, C.F. Lee, Y.K. Cheung
Paper presented at the 9th ISRM Congress, August 25–28, 1999
Paper Number: ISRM-9CONGRESS-1999-266
... acoustic wave, in- ter-hole seismic wave penetration, electromagnetic topography (CT) and borehole elastic modulus have been conducted in the research area of the barrier. ' ' ~ I 'i . The single-hole acoustic wave velocity is between SSOO and S700m/s in general, less varying along the hole depth...
Proceedings Papers
Paper presented at the 9th ISRM Congress, August 25–28, 1999
Paper Number: ISRM-9CONGRESS-1999-182
... moduli of rock under compression obtained by measuring the seismic wave velocities under load and by using a crack model. The laboratory tests were conducted to measure P- and S-wave velocities at different stress levels with directions. In the modeling work, a two-dimensional sliding crack model...
Proceedings Papers
Paper presented at the 8th ISRM Congress, September 25–29, 1995
Paper Number: ISRM-8CONGRESS-1995-043
.... Generally, sandstone has bedding planes, and P wave velocity is minimum in a direction perpendicular to the planes. P wave velocity in our specimen under atmospheric pressure were 2.94l±0.007km1sec in a direction perpendicular to bedding planes and 3.161 ± 0.096km/sec in a direction parallel to the plane...
Proceedings Papers
Paper presented at the 6th ISRM Congress, August 30–September 3, 1987
Paper Number: ISRM-6CONGRESS-1987-096
... part, down to some 50–60 m, the massif is unloaded due to unexpected decrease of the vertical component бz = бI =γh, where: γ - volume weight, h - thickness of the above laying rock (Savich et al. 1981). Upstream Oil & Gas alteration correspond fluctuation wave velocity Savich...
Proceedings Papers
Paper presented at the 6th ISRM Congress, August 30–September 3, 1987
Paper Number: ISRM-6CONGRESS-1987-072
... correlation video tape recorder fresh granite hydraulic fracturing wave velocity borehole wall colour variation Colour Image New system for borehole TV logging and evaluation of weathered granites according to their colour indices Nouveau systsme de diagraphie des sondages et evaluation des granits...
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