Surface features of uniaxial tensile fractures and their relation to rock anisotropy in Inada granite

Fujii, Yukiyasu; Takemura, Takato; Takahashi, M.; Lin, Weiren

doi:10.1016/j.ijrmms.2006.05.001

Cited by 60 publications

(23 citation statements)

References 18 publications

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“…The importance of textural characteristics of rocks in describing the mechanical behaviour has been elaborated by several workers (e.g. Tugrul and Zarif, 1999;Fujii et al, 2007;Lindqvist et al, 2007;Yilmaz et al, 2011;Sousa, 2013 (Akesson et al, 2003;Tugrul, 2004;Zorlu et al, 2008;Yilmaz et al, 2011;Sousa, 2013). The mineralogical composition of major rock forming minerals is essential when assessing the mechanical behaviour of rocks together with assessment of the potential influence of texture (Tugrul and Zarif, 1999;Yilmaz et al, 2011;Arif et al, 2013).…”

Section: Rocks Textures As a Controlling Factormentioning

confidence: 99%

Petrographic features as an effective indicator for the variation in strength of granites

Sajid

Coggan

Arif

et al. 2016

Engineering Geology

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The important textural features include average grain size of rock, grain boundary recrystallization, maximum grain size of major rock forming minerals, mean grain size of cleaved minerals, mineral exsolution and variation of grain size within a rock. The petrographic observations, however, are more effective to describe the strength variation of granites having analogous weathering grade as change in degree of weathering has a dominant effect on rock mechanics.

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Section: Rocks Textures As a Controlling Factormentioning

confidence: 99%

Petrographic features as an effective indicator for the variation in strength of granites

Sajid

Coggan

Arif

et al. 2016

Engineering Geology

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“…Preceded by elastic deformation in granite (Lajtai, 1998), in addition to existing crack closure and internal crack sliding, changes in the microcrack network affect the physical and mechanical properties of the rock and are responsible for the decay and anisotropy found in many granites (Fujii et al, 2007;Fort et al, 2011). Microcrack characteristics and the physical-mechanical properties of rocks are, then, essential considerations when assessing material durability (Matias and Alves, 2001;Sousa et al, 2005).…”

Section: Accepted M Manuscriptmentioning

confidence: 99%

Freeze–thaw fracturing in building granites

Freire-Lista

Fort

Varas–Muriel

2015

Cold Regions Science and Technology

128

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“…However, in these studies granites were mainly treated as low-permeability rocks and the influence of infiltration of injection fluid has rarely been discussed. Moreover, there is anisotropy phenomenon in some granites and they have three cleavages or planes of weakness called rift, grain and hardway (Douglass and Voight 1969;Fujii et al 2007). The cleavages have different tensile strength and permeability and therefore influence fracture generation in laboratory hydraulic fracturing test (Chen et al 2015;Zhuang et al 2016a;Diaz et al 2016).…”

Section: Introductionmentioning

confidence: 99%

Effect of Water Infiltration, Injection Rate and Anisotropy on Hydraulic Fracturing Behavior of Granite

et al. 2018

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Hydraulic fracturing tests on Pocheon granite cylinders at seven different injection rates varying from 1 to 100 mm 3 /s were conducted. They were compared with sleeve fracturing tests in which borehole was sleeved, and therefore, water infiltration influence was excluded. Hydraulic fracturing behavior of granite is significantly influenced by water infiltration, which is closely related to the preexisting microcracks in granite as well as the cleavage anisotropy. There was a threshold injection rate to fracture the granite specimen under given stress conditions. When the injection rate is below the threshold, water infiltrated granite matrix with slow increment of injection pressure, and the specimen finally reached a full saturation without fracturing. Injection pressure developed nonlinearly with time during water infiltration, while approximately linearly when infiltration was excluded. For both hydraulic and sleeve fracturing tests, breakdown pressure increases with increasing injection rate. The breakdown pressures by sleeve fracturing were more than two times higher than those in hydraulic fracturing. X-ray computed tomography (CT) observations show that induced fractures are along the weaker cleavage parallel to the direction of the vertical stress. The higher breakdown pressure results in a larger aperture of fractures in hydraulic fracturing tests.

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Surface features of uniaxial tensile fractures and their relation to rock anisotropy in Inada granite

Cited by 60 publications

References 18 publications

Petrographic features as an effective indicator for the variation in strength of granites

Petrographic features as an effective indicator for the variation in strength of granites

Freeze–thaw fracturing in building granites

Effect of Water Infiltration, Injection Rate and Anisotropy on Hydraulic Fracturing Behavior of Granite

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