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| Mechanical Properties and Failure Characteristics of Combined Hole Rocks with Different Dip Angles Based on PFC2D |
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Received:April 30, 2022
Revised:May 08, 2022
Accepted:May 10, 2022
Published Online:July 04, 2022
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| DOI： |
| KeyWord:PFC2D；combined hole；mechanical properties；failure characteristics |
| Author | Institution |
| Wang Yuchi |
Exposed Branch，Gongchangling Mining Corporation，Mining Company of Ansteel Group Corporation |
| Yang Yong |
Exposed Branch，Gongchangling Mining Corporation，Mining Company of Ansteel Group Corporation |
| Zhang Zhongzheng |
Exposed Branch，Gongchangling Mining Corporation，Mining Company of Ansteel Group Corporation |
| Hu Jun |
University of Science and Technology LiaoNing |
| Xia Zhiguo |
University of Science and Technology LiaoNing |
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| Abstract: |
| In a rock mass, cracks and hole defects of various sizes and geometries naturally occur, which in turn can change the mechanical properties of a rock mass. These defects are the key factors causing the instability of surrounding rock. The study on the composite hole defect model is conducive to the stability control of surrounding rock. In view of this, two-dimensional particle flow (PFC2D) software was used to perform uniaxial compression tests on combined hole rocks with different dip angles to study their effect on rock mechanical properties and failure characteristics in this study.The results show that the hole defect reduces the uniaxial compressive strength, peak strain, crack initiation stress, and damage stress of a rock mass. Also, these defects accelerate the generation of cracks and promote the destruction of a rock mass. Different dip angles have different effects on the mechanical properties and damage degree of the specimens, which basically shows a trend of decreasing initially and then increasing with the increase of dip angle. Before crack formation, the tensile stress concentration area of each specimen is distributed on the upper and lower parts of the holes, and the compressive stress concentration area is distributed on the left and right sides of the holes. After model failure, the compressive stress concentration area is transferred to the left and right sides of the model along the left and right ends of the holes. |
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