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Failure and Acoustic Emission Characteristics of Jointed Rock Masses with Different Joint Inclination Angles and Combination Mode
https://orcid.org/0000-0002-2817-9917
Abstract In order to analyze the characteristics of the mechanical property, failure mode and acoustic emission of the columnar jointed rock masses, defined rock material of six different lithologic characters, Adopt two combination methods of monomer and combination to constitute columnar specimens with different joint angles from 0° to 90°. The stress–strain curve of the uniaxial compression numerical simulation of the columnar jointed rock masses can be divided into three stages: the stable development stage of elastic deformation and micro-fracture, the development and failure stage of fracture, and the post-failure stage. With the joint inclination angles gradually increases, the peak strength of columnar jointed rock mass decreases first and then increases, presenting ‘U-shape’ curves. When the joint inclination angle approaches 60°, the failure changes from brittle splitting failure of rock block to shear failure along the joint surface, and the peak strength gradually decreases. When the columnar joints of soft and hard composite rock masses are destroyed, the soft part is destroyed first, and the hard part is destroyed after reaching the peak strength, there will be two acoustic emission (AE) peaks.
Failure and Acoustic Emission Characteristics of Jointed Rock Masses with Different Joint Inclination Angles and Combination Mode
https://orcid.org/0000-0002-2817-9917
Abstract In order to analyze the characteristics of the mechanical property, failure mode and acoustic emission of the columnar jointed rock masses, defined rock material of six different lithologic characters, Adopt two combination methods of monomer and combination to constitute columnar specimens with different joint angles from 0° to 90°. The stress–strain curve of the uniaxial compression numerical simulation of the columnar jointed rock masses can be divided into three stages: the stable development stage of elastic deformation and micro-fracture, the development and failure stage of fracture, and the post-failure stage. With the joint inclination angles gradually increases, the peak strength of columnar jointed rock mass decreases first and then increases, presenting ‘U-shape’ curves. When the joint inclination angle approaches 60°, the failure changes from brittle splitting failure of rock block to shear failure along the joint surface, and the peak strength gradually decreases. When the columnar joints of soft and hard composite rock masses are destroyed, the soft part is destroyed first, and the hard part is destroyed after reaching the peak strength, there will be two acoustic emission (AE) peaks.
Failure and Acoustic Emission Characteristics of Jointed Rock Masses with Different Joint Inclination Angles and Combination Mode
https://orcid.org/0000-0002-2817-9917
Abstract In order to analyze the characteristics of the mechanical property, failure mode and acoustic emission of the columnar jointed rock masses, defined rock material of six different lithologic characters, Adopt two combination methods of monomer and combination to constitute columnar specimens with different joint angles from 0° to 90°. The stress–strain curve of the uniaxial compression numerical simulation of the columnar jointed rock masses can be divided into three stages: the stable development stage of elastic deformation and micro-fracture, the development and failure stage of fracture, and the post-failure stage. With the joint inclination angles gradually increases, the peak strength of columnar jointed rock mass decreases first and then increases, presenting ‘U-shape’ curves. When the joint inclination angle approaches 60°, the failure changes from brittle splitting failure of rock block to shear failure along the joint surface, and the peak strength gradually decreases. When the columnar joints of soft and hard composite rock masses are destroyed, the soft part is destroyed first, and the hard part is destroyed after reaching the peak strength, there will be two acoustic emission (AE) peaks.
Failure and Acoustic Emission Characteristics of Jointed Rock Masses with Different Joint Inclination Angles and Combination Mode
Zhang, Qinghao (author) / Tang, Xinbao (author) / Zhou, Yan (author) / Ma, Depeng (author)
2021
Article (Journal)
Electronic Resource
English
BKL:
57.00$jBergbau: Allgemeines
/
38.58
Geomechanik
/
57.00
Bergbau: Allgemeines
/
56.20
Ingenieurgeologie, Bodenmechanik
/
38.58$jGeomechanik
/
56.20$jIngenieurgeologie$jBodenmechanik