Velocity anisotropy in dry and saturated rock spheres and its relation to rock fabric

Thill, R.E.; Bur, Thomas R.; Steckley, Robert C.

doi:10.1016/0148-9062(73)90004-1

Cited by 66 publications

(27 citation statements)

References 25 publications

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“…This type of correlation analysis is useful for evaluating the relative strength of rock cleavage and discriminating three quarrying planes. (Park, 2007) (Douglass and Voight, 1969;Thill et al, 1969;Peng and Johnson, 1972;Thill et al, 1973;Plumb et al, 1984) 그리고 국내의 연구사례 (Jang and Oh, 2001;Park et al, 2001Park et al, , 2004Park, 2007Park, , 2011Park, , 2015aPark, , 2015b)에서는 석영 및 장 석내 미세균열을 강조하고 있으며, 상대적인 분리성, 즉 리프트 > 그레인 > 하드웨이를 제시하고 있다. 이외 국내의 연구 사례 (Jang et al, 1998;Lee et al, 1999;Seo and Jeong, 1999;Seo et al, 2002;Park and Seo, 2003;Park, 2005;Chae and Seo, 2011;Kang et al, 2014) …”

Section: 핵심어: 미세균열의 길이 및 간격 거창화강암 결 교차각 지수차 R-유형 H-유형unclassified

Evaluation for Rock Cleavage Using Distribution of Microcrack Lengths and Spacings (1)

Park¹

2017

The Journal of the Petrological Society of Korea

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Section: 핵심어: 미세균열의 길이 및 간격 거창화강암 결 교차각 지수차 R-유형 H-유형unclassified

Evaluation for Rock Cleavage Using Distribution of Microcrack Lengths and Spacings (1)

Park¹

2017

The Journal of the Petrological Society of Korea

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“…According to the excavation of deep buried tunnel in Hydropower Station, the stress path of the three direction loading is determined, in triaxial compression test: (1).At the same time, loading theσ 2 ,σ 3 to set value (0.6 MPa, 1.2 MPa, 1.8 MPa) (2). Keep σ 2 ,σ 3 unchanged, loading σ1 until sample damage.…”

Section: Experiments Schemementioning

confidence: 99%

“…In 1973,R.E.Thill [1] studied the relationship between the change of elastic wave velocity and the joints in rock. In 1997,R.…”

Section: Introductionmentioning

confidence: 99%

Study on Damage Constitutional Relation and Attenuation Law of Elastic Wave in Fractured Rock Mass

Zhao¹,

Li²,

Dong³

2015

Proceedings of the International Conference on Advances in Energy, Environment and Chemical Engineering

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Abstract. Fissures in the high stress mass of deep buried had a great influence on mechanical properties and wave velocity of rock mass. Based on similarity theory, Rock like materials simulated deep buried marble of Jinping-II Hydropower Station. Under different fracture and different confining pressure, the triaxial compression test could be used in the model of the specimen. Collected the data timely and plotted the stress-strain curve and the stress-acoustic curve in the process of tests, then the model test-piece was equivalent to transversely isotropic material with multi group uniform distribution crack, established the damage constitutive relation which contains the acoustic wave velocity variable. The research achievement shows: In the triaxial compression test, the wave velocity increases with the axial compression when confining pressure is constant, the text advanced the speed by the first fast then slow way, the wave velocity increases with the axial compression is constant; the angle of fracture has a significant influence on acoustic wave velocity and attenuation of the energy of acoustic wave, under the same stress state, the larger the angle between the propagate direction of velocity and the fracture, the attenuation of sonic energy is more obvious, and the smaller the acoustic velocity. IntroductionThe existence of joints has great influence on the physical and mechanical properties of rock mass, the energy attenuation characteristics and wave velocity of elastic wave are changed. So the study of propagation and attenuation law of elastic wave in deep rock mass with joints is full of meaning.Many scholars and experts have studied the propagation and attenuation of elastic waves in fractured rock mass. In 1973,R.E.Thill[1] studied the relationship between the change of elastic wave velocity and the joints in rock. In 1997,R. Holt [2] got the wave velocity of elastic wave in the rock mass with different crack distribution through laboratory tests. In china, the research on the laws of the elastic wave propagation in rock date back from 1970.Gao longsheng and Ge huancheng[3] test the elastic wave velocity at different confining pressure which include ten rock samples. Huang chengxian and Song dawei[4] test the changing rule of the elastic wave velocity of rock in different confining pressure; Wang hongtu [5] etc. studied the dynamic elastic parameters of the fractured rock mass, the relationship between the elastic wave velocity and fracture. Zhao mingjie[6]studied the relationship among the elastic wave velocity, attenuation and stress based on the bearing and deforming of joint.Liu yonggui [7]etc. studied the reflective relationship when elastic wave go through the joint surface of basalt.In conclusion, scholars at home or abroad put lots of effort into the correlation between stress effect, crack distribution and wave velocity and the propagation attenuation of sonic waves in fractured rock mass, and lots of achievements have been obtained as well. However, there are less reports on the study ...

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“…한편 리프트, 그레인 및 하드웨이 그리고 미세균열 사이의 상관성에 대한 연구 사례는 Douglass and Voight(1969), Thill et al(1969), Peng and Johnson (1972), Thill et al(1973), Plumb et al(1984) 사례는 Wawersik and Brace(1971), Peng and Johnson(1972), Simmon et al(1975), Hadley(1976), Tapponier and Brace(1976), Kranz (1979, 1980, 1983) 및 Wong(1982 등에서 확인이 되고 있다. 이와 관련된 최근의 국내외 연구사례는 Jang et al(1998), Lee et al(1999), Seo and Jeong (1999), Seo(2000), Nishiyama et al(2002), Seo et al(2002), Akesson et al(2003), Chae and Seo …”

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Characteristics of the Rock Cleavage in Jurassic Granite, Geochang

Park¹

2015

The Journal of the Petrological Society of Korea

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Jurassic granite from Geochang was analysed with respect to the characteristics of the rock cleavage. we have mainly discussed the structual anisotropy formed by microcracks. The phases of distribution of microcracks were well evidenced from the enlarged photomicrographs(× 6.7) of the thin section. The planes of principal set of microcracks are parallel to the rift plane and those of secondary set are parallel to the grain plane. These rift and grain microcracks are mutually near-perpendicular on the hardway planes. From the directional angle(θ) -total length(L t ), number(N) and density(ρ) chart, the curve patterns of the above microcrack parameters reflect the phases of distribution of microcracks. Microcrack parameters such as number, length and density show an order of rift > grain > hardway. These results indicate a relative magnitude of the rock cleavage. Meanwhile, brazilian tensile strengths were measured with respect to the six directions. The results revealed a strong correlation between mechanical property with the above microcrack parameters. These general results correspond to those of the previous study for Jurassic granites from Pocheon and Hapcheon. Image processing technique for the enlarged photomicrograph of the thin section was carried out. The grain 1(G1) microcrack arrays developed in quartz and feldspar grains show excellent distribution on the photomicrograph. In particular, the directional angle of each microcrack set can be ascertained easily by brief image processing for the above photomicrograph.

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Velocity anisotropy in dry and saturated rock spheres and its relation to rock fabric

Cited by 66 publications

References 25 publications

Evaluation for Rock Cleavage Using Distribution of Microcrack Lengths and Spacings (1)

Evaluation for Rock Cleavage Using Distribution of Microcrack Lengths and Spacings (1)

Study on Damage Constitutional Relation and Attenuation Law of Elastic Wave in Fractured Rock Mass

Characteristics of the Rock Cleavage in Jurassic Granite, Geochang

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