Sliding Impact Mechanism of Square Roadway Based on Complex Function Theory
To clarify the process of stress change and plastic zone evolution of square roadways under high-stress conditions, the rotational square expansion plastic zone evolution model of square roadway was established by theoretical analysis, numerical simulation, and engineering verification. The shear sl...
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| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/6655694 |
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| author | Decheng Ge Fuxing Jiang Cunwen Wang Yang Chen Chunyu Dong Sitao Zhu Zhaoyi Wang Fei Han |
| author_facet | Decheng Ge Fuxing Jiang Cunwen Wang Yang Chen Chunyu Dong Sitao Zhu Zhaoyi Wang Fei Han |
| author_sort | Decheng Ge |
| collection | DOAJ |
| description | To clarify the process of stress change and plastic zone evolution of square roadways under high-stress conditions, the rotational square expansion plastic zone evolution model of square roadway was established by theoretical analysis, numerical simulation, and engineering verification. The shear slip impact stress criterion of square roadway based on complex variable function theory was studied, and the law of surrounding rock stress distribution, plastic zone expansion, elastic energy density, local energy release rate (LERR), and total energy release of square roadway were analyzed. The results show that the compressive stress is concentrated in the four corners of the roadway after the roadway excavated and transfers with the change of plastic zone. Main shear failures start from the four corners and develop in a rotating square shape, forming square failure zones I and II. The square failure zone I is connected with the roadway contour and rotated 45°. The square failure zone II is connected with the square failure zone I and rotated 45°. When the original rock stress is low, the surrounding rock tends to be stable after the square shear slip line field formed. When the original rock stress is high, the shear failure of the surrounding rock continues to occur after the square failure zone II formed, showing a spiral slip line. Corners of the square roadway and square failure zones I and II are the main energy accumulation and release areas. The maximum elastic energy density and LERR increase exponentially with the ratio of vertical stress to uniaxial compressive strength (Ic). When square corners of the roof are changed to round corners, the plastic zone of the roof expands to form an arch structure. The maximum elastic energy density decreases by 22%, which reduces the energy level and possibility of rock burst. This study enriches the failure mechanism of roadway sliding impact. It can provide a basic theoretical reference for the design of the new roadway section and support form based on the prevention of rock burst. |
| format | Article |
| id | doaj-art-757264b7f873412db3720c242f02a57f |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-757264b7f873412db3720c242f02a57f2025-02-03T01:09:55ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/66556946655694Sliding Impact Mechanism of Square Roadway Based on Complex Function TheoryDecheng Ge0Fuxing Jiang1Cunwen Wang2Yang Chen3Chunyu Dong4Sitao Zhu5Zhaoyi Wang6Fei Han7School of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaResearch Center for Rock Burst Control of Shandong Energy Group Co., Ltd., Jinan, Shandong 250014, ChinaShandong Energy Group Co., Ltd., Jinan, Shandong 250014, ChinaResearch Center for Rock Burst Control of Shandong Energy Group Co., Ltd., Jinan, Shandong 250014, ChinaSchool of Civil and Resource Engineering, University of Science and Technology Beijing, Beijing 100083, ChinaLiangbaosi Coal Mine, Shandong Energy Feicheng Mining Group Co., Ltd., Jining, Shandong 272400, ChinaResearch Center for Rock Burst Control of Shandong Energy Group Co., Ltd., Jinan, Shandong 250014, ChinaTo clarify the process of stress change and plastic zone evolution of square roadways under high-stress conditions, the rotational square expansion plastic zone evolution model of square roadway was established by theoretical analysis, numerical simulation, and engineering verification. The shear slip impact stress criterion of square roadway based on complex variable function theory was studied, and the law of surrounding rock stress distribution, plastic zone expansion, elastic energy density, local energy release rate (LERR), and total energy release of square roadway were analyzed. The results show that the compressive stress is concentrated in the four corners of the roadway after the roadway excavated and transfers with the change of plastic zone. Main shear failures start from the four corners and develop in a rotating square shape, forming square failure zones I and II. The square failure zone I is connected with the roadway contour and rotated 45°. The square failure zone II is connected with the square failure zone I and rotated 45°. When the original rock stress is low, the surrounding rock tends to be stable after the square shear slip line field formed. When the original rock stress is high, the shear failure of the surrounding rock continues to occur after the square failure zone II formed, showing a spiral slip line. Corners of the square roadway and square failure zones I and II are the main energy accumulation and release areas. The maximum elastic energy density and LERR increase exponentially with the ratio of vertical stress to uniaxial compressive strength (Ic). When square corners of the roof are changed to round corners, the plastic zone of the roof expands to form an arch structure. The maximum elastic energy density decreases by 22%, which reduces the energy level and possibility of rock burst. This study enriches the failure mechanism of roadway sliding impact. It can provide a basic theoretical reference for the design of the new roadway section and support form based on the prevention of rock burst.http://dx.doi.org/10.1155/2021/6655694 |
| spellingShingle | Decheng Ge Fuxing Jiang Cunwen Wang Yang Chen Chunyu Dong Sitao Zhu Zhaoyi Wang Fei Han Sliding Impact Mechanism of Square Roadway Based on Complex Function Theory Shock and Vibration |
| title | Sliding Impact Mechanism of Square Roadway Based on Complex Function Theory |
| title_full | Sliding Impact Mechanism of Square Roadway Based on Complex Function Theory |
| title_fullStr | Sliding Impact Mechanism of Square Roadway Based on Complex Function Theory |
| title_full_unstemmed | Sliding Impact Mechanism of Square Roadway Based on Complex Function Theory |
| title_short | Sliding Impact Mechanism of Square Roadway Based on Complex Function Theory |
| title_sort | sliding impact mechanism of square roadway based on complex function theory |
| url | http://dx.doi.org/10.1155/2021/6655694 |
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