The Quantitative Effect of Hydrostatic Confining Pressure on the Compressive Strength of Crystalline Rocks

Ohnaka, Mitiyasu

doi:10.4294/jpe1952.21.125

Cited by 40 publications

(23 citation statements)

References 22 publications

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“…This value is 6.070 for the granitic rocks with m ¼4.57 and n¼0.52 [35]. This id just has a practical example as exhibited in Fig.…”

Section: Murrell Criterionmentioning

confidence: 96%

“…Mogi [34] showed that the strength data for a wide variety of rocks were expressed by the power law with an exponent close to 0.5. Ohnaka [35] showed that the scatter due to the differences in rocks and experimental conditions could be reduced if the strength and confining pressure were normalized with the UCS. For granitic rocks, for example, m¼ 4.57 and n ¼0.52.…”

Section: Murrell Criterionmentioning

confidence: 99%

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Comparison of the accuracy of some conventional triaxial strength criteria for intact rock

Mingqing¹

2011

International Journal of Rock Mechanics and Mining Sciences

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“…This value is 6.070 for the granitic rocks with m ¼4.57 and n¼0.52 [35]. This id just has a practical example as exhibited in Fig.…”

Section: Murrell Criterionmentioning

confidence: 96%

Section: Murrell Criterionmentioning

confidence: 99%

Comparison of the accuracy of some conventional triaxial strength criteria for intact rock

Mingqing¹

2011

International Journal of Rock Mechanics and Mining Sciences

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“…5 have been obtained by many previous authors and discussed both empirically (e.g., OHNAKA, 1973) and theoretically (MURRELL, 1971;MOGI, 1972MOGI, , 1974. OHNAKA (1973) proposed empirically the following equation to describe the pressure dependence of the strength:…”

Section: Methodsmentioning

confidence: 99%

“…3.3 Pressure dependence of failure strength It is well known that the strength of a rock increases as confining pressure increases (MOGI, 1966OHNAKA, 1973;BYERLEE, 1967;MATSUSHIMA, 1960 b). In Fig.…”

Section: Methodsmentioning

confidence: 99%

Experimental study of strain-rate dependence and pressure dependence of failure properties of granite.

1987

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Effects of the strain rate and pressure on various brittle properties of granite under compressional loading are studied experimentally. Granite specimens were tested to failure under various constant strain rates at confining pressures of 0.1 to 200 MPa. The strain rates in these tests varied from 10-4 to 10-8 S s-1. The results show that the strength of granite decreases linearly as the logarithm of the strain rate decreases, and that the strain-rate dependence on the strength is enhanced at high confining pressures. The dilatant strain and elastic wave velocity variations with stress were found to be independent of the strain rate if the stress is normalized by the strength. The dilatant-strain-versus-stress curve is significantly affected by confining pressure but the confining pressure effect on the dilatant strain versus normalized stress is small. The acoustic emission rate is accelerated at a stress level closer to the failure strength as the strain rate decreases. Some of the timedependent properties are explained by a theory based on the concept of subcritical stress-corrosion cracking. But it is also clear that the stress-corrosion cracking theory does not provide reasonable explanations of the variation of acoustic emission rate with stress and the variation of strain with stress at the stage immediately before fracture.

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“…K, n, α, β and γ are dimensionless. K, n of the granite and peridotite are from Ohanka [12] ; grabbro from Zang et al [5] ; basalt from Zhang et al [23] ; α, β and γ of all the columns come from this study.…”

Section: Empirical Formula Of Fracture Strength In the Lithosphere Anmentioning

confidence: 99%

Effects of Temperature and Strain Rate on Fracture Strength of Rocks and Their Influence on Rheological Structure of the Lithosphere

Wei¹,

Zang²

2006

Chinese J. Geophys.

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Effects of temperature and strain rate on fracture strength of rocks are studied based on available experiment data, and a new empirical formula for the fracture strength of some typical rocks in the lithosphere is obtained. The effects of the confining pressure, size of rock samples, temperature and strain rate are taken into account in this formula so that it can further reveal the actual fracture states in the lithosphere. Application of the new empirical formula to the Ordos block shows that the conventional rheological model overestimates the rheological strength and misinterpret rheological deformation mechanisms in the lithosphere. The brittle regime in the rheological structure calculated from the new formula can be divided into two sub-regions in which frictional sliding or brittle fracture is dominant, respectively. The magnitude of the rheological strength is decreased and the area of the brittle regime is enlarged when more representative rocks and effect of the strain rate are taken into account.

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The Quantitative Effect of Hydrostatic Confining Pressure on the Compressive Strength of Crystalline Rocks

Cited by 40 publications

References 22 publications

Comparison of the accuracy of some conventional triaxial strength criteria for intact rock

Comparison of the accuracy of some conventional triaxial strength criteria for intact rock

Experimental study of strain-rate dependence and pressure dependence of failure properties of granite.

Effects of Temperature and Strain Rate on Fracture Strength of Rocks and Their Influence on Rheological Structure of the Lithosphere

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