Numerical Investigation of Damage Risks of Roadway Surrounding Rocks under Oblique Incident Dynamic Loads
In order to quantitatively demonstrate the damage risks of roadway surrounding rocks and meanwhile comprehensively consider stress states of surrounding rocks, an index to evaluate damage hazards was established based on Mohr-Coulomb strength criterion. Taking the track roadway of Longwall Panel 402...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2017-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2017/6298372 |
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| author | Zhengyi Wang Linming Dou Jing Li Kai Kang Longfei Feng |
| author_facet | Zhengyi Wang Linming Dou Jing Li Kai Kang Longfei Feng |
| author_sort | Zhengyi Wang |
| collection | DOAJ |
| description | In order to quantitatively demonstrate the damage risks of roadway surrounding rocks and meanwhile comprehensively consider stress states of surrounding rocks, an index to evaluate damage hazards was established based on Mohr-Coulomb strength criterion. Taking the track roadway of Longwall Panel 402103 in Hujiahe Coal Mine as an example, damage risks and dynamic response characteristics of surrounding rocks under oblique incident dynamic loads were studied in accordance with the new evaluation criterion. The results show that all conventional analysis indexes only reflect the stress distribution characteristics of coal-rocks from a certain aspect in two-dimension space, while all stress components can be considered by the damage risk index, with the evaluation criterion quantified, which can comprehensively reveal the stress states and damage of coal-rock masses. Under dynamic loading, the overall damage risks and damage degrees of roadway surrounding rocks are attributed to the superposition results of dynamic and static loads. The dynamic loads not only aggravate the damage of shallow surrounding rocks but also increase the damage risks of deep parts. The engineering practice demonstrates that the analysis results coincide with in situ damage of roadway surrounding rocks. |
| format | Article |
| id | doaj-art-a8bdd3882e6142489815364d5c50c017 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2017-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-a8bdd3882e6142489815364d5c50c0172025-08-20T03:39:09ZengWileyShock and Vibration1070-96221875-92032017-01-01201710.1155/2017/62983726298372Numerical Investigation of Damage Risks of Roadway Surrounding Rocks under Oblique Incident Dynamic LoadsZhengyi Wang0Linming Dou1Jing Li2Kai Kang3Longfei Feng4School of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Mines, China University of Mining and Technology, Xuzhou 221116, ChinaIn order to quantitatively demonstrate the damage risks of roadway surrounding rocks and meanwhile comprehensively consider stress states of surrounding rocks, an index to evaluate damage hazards was established based on Mohr-Coulomb strength criterion. Taking the track roadway of Longwall Panel 402103 in Hujiahe Coal Mine as an example, damage risks and dynamic response characteristics of surrounding rocks under oblique incident dynamic loads were studied in accordance with the new evaluation criterion. The results show that all conventional analysis indexes only reflect the stress distribution characteristics of coal-rocks from a certain aspect in two-dimension space, while all stress components can be considered by the damage risk index, with the evaluation criterion quantified, which can comprehensively reveal the stress states and damage of coal-rock masses. Under dynamic loading, the overall damage risks and damage degrees of roadway surrounding rocks are attributed to the superposition results of dynamic and static loads. The dynamic loads not only aggravate the damage of shallow surrounding rocks but also increase the damage risks of deep parts. The engineering practice demonstrates that the analysis results coincide with in situ damage of roadway surrounding rocks.http://dx.doi.org/10.1155/2017/6298372 |
| spellingShingle | Zhengyi Wang Linming Dou Jing Li Kai Kang Longfei Feng Numerical Investigation of Damage Risks of Roadway Surrounding Rocks under Oblique Incident Dynamic Loads Shock and Vibration |
| title | Numerical Investigation of Damage Risks of Roadway Surrounding Rocks under Oblique Incident Dynamic Loads |
| title_full | Numerical Investigation of Damage Risks of Roadway Surrounding Rocks under Oblique Incident Dynamic Loads |
| title_fullStr | Numerical Investigation of Damage Risks of Roadway Surrounding Rocks under Oblique Incident Dynamic Loads |
| title_full_unstemmed | Numerical Investigation of Damage Risks of Roadway Surrounding Rocks under Oblique Incident Dynamic Loads |
| title_short | Numerical Investigation of Damage Risks of Roadway Surrounding Rocks under Oblique Incident Dynamic Loads |
| title_sort | numerical investigation of damage risks of roadway surrounding rocks under oblique incident dynamic loads |
| url | http://dx.doi.org/10.1155/2017/6298372 |
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