Surface Characterization and Frictional Energy Dissipation Characteristics of Deep Granite Under High Stress Conditions

Lan, Qiao; Chen, Lu; Dasgupta, Gautam; Li, Qingwen; Yuan, Lü

doi:10.1007/s00603-018-1510-5

Cited by 15 publications

(5 citation statements)

References 49 publications

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“…This material provides excellent light transmission properties and is easy to process. The density of the polycarbonate is 1.2 g/cm 3 , with an elastic modulus of 2.3 GPa and a Poisson's ratio of 0.36. The inherent bonding strength of polycarbonate is low, which results in minimal impact on its overall strength and stability.…”

Section: Particle Flow Photoelastic Experiments Apparatus and Experim...mentioning

confidence: 99%

“…The excavation of geotechnical engineering projects-such as tunnel excavation, underground mining, foundation pit excavation and slopes-causes disturbances, which create free surfaces disrupting the original mechanical equilibrium of the rock and soil masses. The modified masses attain a state of self-stabilization through internal particle reorganization and stress redistribution [1][2][3][4][5][6]. The rock and soil masses below the free surface remain in a fluid state during this self-stabilization process.…”

Section: Introductionmentioning

confidence: 99%

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Mechanics and Stability of Force Chain Arch in Excavated Granular Material

Wang,

Zheng,

Xue

2024

Applied Sciences

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Rock and soil masses in geotechnical engineering projects, such as tunnels, mines and slopes, undergo relative motion, exhibiting mechanical characteristics of solid–fluid transition under critical conditions. This work analyzes the characteristics of the solid–fluid transition interface and the mode of load transfer through biaxial compression particle flow photoelastic experiments on granular materials. The study documents that this interface forms an arch shape, marked by a force chain arch. The granular material exhibits two distinct states depending on its position: below the arch, the granular material is in a solid–fluid transitional state, with bearing capacity reduced, while above the arch, it is in a stable solid state, capable of bearing the overlying rock layer’s load. The presence of the force chain arch alters the direction of the originally downward-transferring load, redirecting it along the trajectory of the arch. Analysis of the force and stability of the force chain arch revealed that the arch shape parameters and boundary loads control the instability of the arch. Changes in the overlying and lateral loads lead to different types of instability of the force chain arch. The findings of the study are crucial for underground engineering construction and for the prevention of geological disasters related to granular material.

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Section: Particle Flow Photoelastic Experiments Apparatus and Experim...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Mechanics and Stability of Force Chain Arch in Excavated Granular Material

Wang,

Zheng,

Xue

2024

Applied Sciences

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“…Based on the published research, 52 the characteristic parameters used to evaluate the smoothness or roughness of an object surface can be expressed as waviness and roughness. Waviness refers to the fluctuation in the specimen surface on the whole, and the roughness is the local degree of concavity or convexity on the surface at any point (Figure 14A).…”

Section: Analysis Of Fracture Mechanismmentioning

confidence: 99%

“…The roughness characteristics of the rock section can be represented by the interpolated fractal surface dimension and calculated by MATLAB. The relevant calculation process can be found in our earlier literature 52 …”

Section: Analysis Of Fracture Mechanismmentioning

confidence: 99%

“…The deformation and failure in underground rock mass engineering are accompanied by energy concentration and release 55,56 . The elastic strain energy stored internally during rock failure is mainly converted into the energy consumption of the new failure section and friction 52 . The frictional energy dissipation is mainly due to the relative slip of the two sides of the cracks driven by the shear stress.…”

Section: Analysis Of Fracture Mechanismmentioning

confidence: 99%

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Study on the fracture behavior of prefabricated fissures granite based on DIC and laser scanning techniques

Hao

et al. 2021

Fatigue Fract Eng Mat Struct

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The initiation, propagation, and coalescence of cracks in the rock bridge are the root causes of rock failure. However, the identification of cracks propagation paths is a problem in rock mechanics. This paper studies the evolutionary law of the strain field in the rock bridge region of granite with pre‐fissures using 3D‐DIC after equivalence and simplification. Based on the real crack initiation mechanism of “relative slip between regions” proposed in this paper, combined with the priority order of crack propagation at the edge of the rock bridge, the pattern of cracks propagation and coalescence was obtained. We analyze the fracture characteristics in roughness and morphology to verify the validity of the proposed mechanism. The tensile and shear failure areas around the rock bridge were identified quantitatively, and the roughness, fractal dimension, and energy consumption of the sections formed by tensile failure and shear failure are different.

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Energy Requirement for Rock Breakage in Laboratory Experiments and Engineering Operations: A Review

Zhang

Ouchterlony

2021

Rock Mech Rock Eng

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Based on the review of a wide range of literature, this paper finds that: (1) the average specific surface energy of various single crystals is only 0.8 J/m2. (2) The average specific fracture energy of the rocks with a pre-crack under static cleavage tests is 4.6 J/m2. (3) The average specific fracture energy of the rocks with a pre-cut notch but with no pre-crack under static tensile fracture (mode I) tests is 4.6 J/m2. (4) The average specific fracture energies of regular rock specimens with neither pre-made crack nor pre-cut notch are 26.6, 13.9 and 25.7 J/m2 under uniaxial compression, tension and shear tests, respectively. (5) The average specific fracture energy of irregular single quartz particles under uniaxial compression is 13.8 J/m2. (6) The average specific fracture energy of particle beds under drop weight tests is 74.0 J/m2. (7) The average specific fracture energy of multi-particles in milling tests is 72.5 J/m2. (8) The average specific energy of rocks in percussive drilling is 399 J/m3, that in full-scale cutting is 131 J/m3, and that in rotary drilling is 157 J/m3. (9) The average energy efficiency of milling is only 1.10%. (10) The accurate measurements of specific fracture energy in blasting are too few to draw reliable conclusions. In the last part of the paper, the effects of inter-granular displacement, loading rate, confining pressure, surface area measurement, premade crack, attrition and thermal energy on the specific fracture energy of rock are discussed.

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Surface Characterization and Frictional Energy Dissipation Characteristics of Deep Granite Under High Stress Conditions

Cited by 15 publications

References 49 publications

Mechanics and Stability of Force Chain Arch in Excavated Granular Material

Mechanics and Stability of Force Chain Arch in Excavated Granular Material

Study on the fracture behavior of prefabricated fissures granite based on DIC and laser scanning techniques

Energy Requirement for Rock Breakage in Laboratory Experiments and Engineering Operations: A Review

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