Influence of Fillers on Mechanical Properties and Fracture Characteristics of Rock Specimens with Double Circular Inclined Cavities

PAN Yanqiu; LUO Xulin; WANG Guozhu

doi:10.13204/j.gyjzG22062201

Volume 53 Issue 8

Aug. 2023

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PAN Yanqiu, LUO Xulin, WANG Guozhu. Influence of Fillers on Mechanical Properties and Fracture Characteristics of Rock Specimens with Double Circular Inclined Cavities[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(8): 176-183. doi: 10.13204/j.gyjzG22062201

Citation:

PAN Yanqiu, LUO Xulin, WANG Guozhu. Influence of Fillers on Mechanical Properties and Fracture Characteristics of Rock Specimens with Double Circular Inclined Cavities[J]. INDUSTRIAL CONSTRUCTION, 2023, 53(8): 176-183. doi: 10.13204/j.gyjzG22062201

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Influence of Fillers on Mechanical Properties and Fracture Characteristics of Rock Specimens with Double Circular Inclined Cavities

doi: 10.13204/j.gyjzG22062201

1. School of Architectural Engineering, Zhengzhou University of Industrial Technology, Zhengzhou 451150, China;
2. State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology, Xuzhou 221116, China

Received Date: 2022-06-22
Available Online: 2023-10-17

Abstract

Abstract

To study the influence of fillers on the mechanical properties and fracture characteristics of rock specimens with double inclined cavities, the numerical simulation of uniaxial compression was performed by discrete element software PFC^2D on rock specimens with double circular cavities filled with different strength fillers at different inclinations. The results indicated that the strength and inclination of fillers had different effects on the strength and deformation characteristics of rock. With the increase of the strength of fillers, the influence of inclinations was gradually weakened. When the filling coefficient λ was 0.6, the reinforcement effect for specimens with inclined cavities was best. When the filling coefficient was greater than 0.6, the strengths of all specimens with indined cavities were almost constant, and all the specimens did not present crack aggregation phenomena between cavities. The failure process of spcimens could be characterized by acoustic emission counting, cumulative acoustic emission counting and location maps. The final failure modes of specimens with different filler strengths could be divided into tensile-shear mixed failure and shear failure. The crack aggregation modes between defects could be divided into non-aggregation, shear aggregation and tensile-shear mixed aggregation.
- double circular inclined cavity,
- strength of filler,
- uniaxial compression,
- mechanical property,
- fracture characteristic,
- acoustic emission

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References(24)

References

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