Analysis of crack coalescence in rock-like materials containing three flaws—Part I: experimental approach

Wong, Ryc; Chau, Kam Tim; Tang, Chun An; Lin, Peng

doi:10.1016/s1365-1609(01)00064-8

Cited by 430 publications

(168 citation statements)

References 29 publications

Supporting

Mentioning

161

Contrasting

Order By: Relevance

“…Bobet and Einstein (1998a) also performed uniaxial and biaxial compression tests on pre-fractured gypsum specimens, investigated the crack initiation, propagation and coalescence of two parallel flaws in gypsum specimens and observed two types of cracks: wing cracks and secondary cracks. Similar observations have been reported by Wong and Chau (1998) on model sandstone and Wong et al (2001) on model specimens. More recently, Prudencio and Van Sint Jan (2007) performed experimental tests on physical models of rock with nonpersistent joints and found that the failure modes and maximum strengths of rock samples were dependent on the geometry of the joint systems, the orientation of the principal stresses, and the ratio between intermediate stress and intact material compressive strength.…”

Section: Introductionsupporting

confidence: 90%

Influence of the geometry of partially-spanning joints on mechanical properties of rock in uniaxial compression

Ranjith

Wasantha

et al. 2013

Engineering Geology

View full text Add to dashboard Cite

Section: Introductionsupporting

confidence: 90%

Influence of the geometry of partially-spanning joints on mechanical properties of rock in uniaxial compression

Ranjith

Wasantha

et al. 2013

Engineering Geology

View full text Add to dashboard Cite

“…Because failure begins by breaking the inter-granular bonds, the microstructure of a rock has a significant influence on the fracture progression behavior. Brittle fracturing of different rock types has been studied by many researchers (Brace et al 1966;Scholz 1968;Peng and Johnson 1972;Tapponnier and Brace 1976;Wong and Chau 1997;Eberhardt et al1999;Wong et al 2001;Alkan et al 2007;Wong and Wu 2014). While the majority of these studies tested intact rock, Ranjith et al (2004) used singly-and multiply-fractured granitic rock and characterized the behavior under uniaxial compression.…”

Section: Fracture Progression In Brittle Rockmentioning

confidence: 99%

Do joint geometrical properties influence the fracturing behaviour of jointed rock? An investigation through joint orientation

Wasantha

Ranjith

Zhang

et al. 2015

Geomech. Geophys. Geo-energ. Geo-resour.

View full text Add to dashboard Cite

Failure of brittle rock is often progressive and understanding the fracture development process within rock masses is important to identify the precursors of failures. Joints in rock masses influence the fracture progression behavior and we studied the influence of joint orientation on fracture progression in jointed rock. Undrained triaxial tests were conducted on 54 mm diameter and 108 mm high intact and singly-jointed sandstone specimens. The joints in jointed specimens were made rough (joint roughness coefficient = 10-12) and embedded in six different orientations-0°, 30°, 45°, 60°, 75°and 90°-and three different combinations of confining and initial pore-water pressures were considered (confining pressure/pore-water pressure = 4/1, 10/4 and 25/10 MPa). An acoustic emission (AE) monitoring system was employed during all tests to monitor the fracture development within the test specimens. The post-failure patterns of specimens displayed three different failure mechanisms-shearing through intact material, sliding along the joint and a mixture of both shearing and sliding-depending on the joint orientation and confining pressure. The fracture progression behavior of the specimens showed a strong correlation with these failure mechanisms. Intact specimens and specimens with joints oriented at 0°, 30°, 90°failed by shearing. Nevertheless, the AE patterns of intact specimens and specimens with 90°-oriented joints contrasted with those of specimens with joints oriented at 0°a nd 30°. Specimens with joints oriented at 60°failed by sliding with a constant rate of acoustic event generation starting from the beginning of deviatoric loading. A mixed failure mechanism was observed for specimens with joints oriented at 45°and 75°. While the characteristics of both sliding and shearing failure were observed from the AE patterns of both 45°and 75°orientations, the shearing failure component of the 75°case was found to be a result of experimental limitations rather than real behavior. Finally, we propose a family of typical AE curves to assist with the characterization of the fracture progression behavior of jointed rock by taking confining pressures and failure mechanisms into consideration.

show abstract

“…The complexity and heterogeneity of rock cracks and the nonlinear characteristics of its high degree of disordered distribution was constituted in rock failure process (Lin et al 2000;Wong et al 2001). Complex materials were previously difficult to quantitatively describe by fractal or chaotic methods.…”

Section: Pattern Of Nonlinear Dynamics Evolution Of Rock Cracksmentioning

confidence: 99%

Experimental Investigation on Nonlinear Dynamic Evolution Patterns of Cracks in Rock Failure Process

Wang

2017

Evolution, Monitoring and Predicting Models of Rockburst

View full text Add to dashboard Cite

Analysis of crack coalescence in rock-like materials containing three flaws—Part I: experimental approach

Cited by 430 publications

References 29 publications

Influence of the geometry of partially-spanning joints on mechanical properties of rock in uniaxial compression

Influence of the geometry of partially-spanning joints on mechanical properties of rock in uniaxial compression

Do joint geometrical properties influence the fracturing behaviour of jointed rock? An investigation through joint orientation

Experimental Investigation on Nonlinear Dynamic Evolution Patterns of Cracks in Rock Failure Process

Contact Info

Product

Resources

About