Results 111 to 120 of about 7,006 (165)
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International Journal of Fracture Mechanics, 1966
This report discusses the present state of knowledge with respect to the nature of the fundamental processes involved in rock breakage, both static and dynamic. Particular attention is paid to assessing the applicability to observed breakage phenomena of the several prevalent theories or criteria of rock failure.
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This report discusses the present state of knowledge with respect to the nature of the fundamental processes involved in rock breakage, both static and dynamic. Particular attention is paid to assessing the applicability to observed breakage phenomena of the several prevalent theories or criteria of rock failure.
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Permeability and piping in fractured rocks
International Journal of Rock Mechanics and Mining Sciences & Geomechanics Abstracts, 1980Two discussions of the paper and the closure by the author are presented. The first discusser points out the need for research to develop criteria for placement of compacted soil, filter and transition materials against fractured rock. The second discusser questions the technique used in the study and points out the different failure mechanisms that ...
Richard E. Goodman +1 more
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1970
In July 1970, a major effort was directed toward the measurment of the in situ state of strain (stress) at an outcrop of Mesa Verde sandstone (Cretaceous), Site No. 1, on the N. 45/sup 0/W.-plunging nose of the Rangely Anticline, W. Colorado. With exception of a few of the photoelastic determinations, all measurements were made within a circle with a ...
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In July 1970, a major effort was directed toward the measurment of the in situ state of strain (stress) at an outcrop of Mesa Verde sandstone (Cretaceous), Site No. 1, on the N. 45/sup 0/W.-plunging nose of the Rangely Anticline, W. Colorado. With exception of a few of the photoelastic determinations, all measurements were made within a circle with a ...
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Controls on fracturing in carbonate rocks
Proceedings of SPE Middle East Oil and Gas Show and Conference, 2005Abstract Sedimentology (lithology, sedimentary structures, bed thick-ness, mechanical stratigraphy, the nature of bedding planes), structural geology (tectonic setting, palaeostresses, subsi-dence/uplift history, proximity to faults, position in a fold, timing of structural events, mineralisation, the angle between bedding and fractures)
D. C. P. Peacock, A. Mann
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Seismic Anisotropy of Fractured Rocks
3rd International Congress of the Brazilian Geophysical Society, 1993Abstract A simple method for including the effects of geologically realistic fractures on the seismic propagation through fractured rocks can be obtained by writing the effective compliance tensor of the fractured rock as the sum of the compliance tensor of the unfractured background rock and the compliance tensors for each set of ...
Michael Schoenberg, Colin M. Sayers
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Reviews of Geophysics, 1975
Fracture is perhaps the most important topic in rock mechanics today, primarily because it is the dominant mechanism of rock failure at the relatively low pressures and temperatures at shallow depths in the earth's crust and because existing fractures strongly influence the physical and mechanical behavior of the rock mass.
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Fracture is perhaps the most important topic in rock mechanics today, primarily because it is the dominant mechanism of rock failure at the relatively low pressures and temperatures at shallow depths in the earth's crust and because existing fractures strongly influence the physical and mechanical behavior of the rock mass.
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Measuring Hydraulic Fracture Growth in Naturally Fractured Rock
SPE Annual Technical Conference and Exhibition, 2009Abstract A field experiment was carried out to measure hydraulic fracture growth in naturally fractured rock. Hydraulic fracture interactions with pre-existing natural fractures, shear zones, veins, and adjacent hydraulic fractures were measured and mapped during the project.
Jeffrey, Robert G. +11 more
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Rock fracture by diamond drilling. [PDF]
The mode of fracture in rocks that necessitate the use of diamond drilling techniques is normally brittle. Such rocks, which may be regarded as polycrystalline materials, maintain their uniaxial mode of brittle fracture up to relatively high constraining pressures, that is pressures higher than those normally associated with diamond drilling.
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Non‐linear flow in fractured rock
International Journal of Numerical Methods for Heat & Fluid Flow, 2001This paper deals with theory and computation of fluid flow in fractured rock. Non‐Darcian flow behavior was observed in pumping tests at the geothermal research site at Soultz‐sous‐Forêts (France). Examples are examined to demonstrate the influence of fracture roughness and pressure‐gradient dependent permeability on pressure build‐up. A number of test
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Fracture and Comminution of Rock
1972Abstract : Existing theories of fracture and comminution of rock were examined and applied to an idealized blasting configuration to obtain the resulting particle size distribution. The results were reasonable, but more development is required for practical applications.
Robert P. Swift +2 more
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