Analysis of Influence of Stress Lode Angle on Stability of Roadway Surrounding Rock
Based on the variation range of the stress lode angle, the in situ rock stress is divided into σv-type stress field, σH-type stress field, and σh-type stress field. Through theoretical analysis, the principal stress difference distribution law and plastic zone distribution pattern around the roadway...
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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/10.1155/2021/6617609 |
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| _version_ | 1850225565876879360 |
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| author | Yihong Liu Hongbao Zhao Lei Wang Tao Wang Dongliang Ji Rui Liu |
| author_facet | Yihong Liu Hongbao Zhao Lei Wang Tao Wang Dongliang Ji Rui Liu |
| author_sort | Yihong Liu |
| collection | DOAJ |
| description | Based on the variation range of the stress lode angle, the in situ rock stress is divided into σv-type stress field, σH-type stress field, and σh-type stress field. Through theoretical analysis, the principal stress difference distribution law and plastic zone distribution pattern around the roadway in different types of stress fields are obtained. Theoretical and numerical simulation calculation results show that under different stress lode angle conditions, the principal stress difference distribution of the surrounding rock of the roadway is greatly different, which has a direct effect on the shape and range of the plastic zone of the surrounding rock of the roadway. In the σv-type stress field and the σH-type stress field, the shape of the plastic zone of the roadway surrounding rock is mainly oval and “butterfly,” while in the σh-type stress field, the shape of the plastic zone of the roadway surrounding rock is mainly oval. The laboratory test proves that the stress gradient has an important effect on the damage degree of the surrounding rock of the roadway. The larger the stress gradient, the higher the strength of the rock mass and the more severe the damage. The change of the stress lode angle will affect the distribution law of the stress gradient of the surrounding rock of the roadway, thus affecting the degree of fragmentation of the surrounding rock. In type σv and type σH stress fields, the surrounding rock of the shoulder can be regarded as a key part of the roadway. In the σh-type stress field, the plastic zones of the surrounding rocks of the roadway are more evenly distributed, and the damage range is less affected by θ. The influence law of the stress lode angle on the stability of the roadway has been well verified by field observation, and effective support measures have been proposed. |
| format | Article |
| id | doaj-art-513fb83292fd4b7dadae0442a5fb09f1 |
| institution | OA Journals |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-513fb83292fd4b7dadae0442a5fb09f12025-08-20T02:05:19ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/66176096617609Analysis of Influence of Stress Lode Angle on Stability of Roadway Surrounding RockYihong Liu0Hongbao Zhao1Lei Wang2Tao Wang3Dongliang Ji4Rui Liu5State Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan, Anhui 232001, ChinaState Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan, Anhui 232001, ChinaState Key Laboratory of Mining Response and Disaster Prevention and Control in Deep Coal Mines, Anhui University of Science and Technology, Huainan, Anhui 232001, ChinaSchool of Energy and Mining Engineering, China University of Mining & Technology-Beijing, Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining & Technology-Beijing, Beijing 100083, ChinaSchool of Energy and Mining Engineering, China University of Mining & Technology-Beijing, Beijing 100083, ChinaBased on the variation range of the stress lode angle, the in situ rock stress is divided into σv-type stress field, σH-type stress field, and σh-type stress field. Through theoretical analysis, the principal stress difference distribution law and plastic zone distribution pattern around the roadway in different types of stress fields are obtained. Theoretical and numerical simulation calculation results show that under different stress lode angle conditions, the principal stress difference distribution of the surrounding rock of the roadway is greatly different, which has a direct effect on the shape and range of the plastic zone of the surrounding rock of the roadway. In the σv-type stress field and the σH-type stress field, the shape of the plastic zone of the roadway surrounding rock is mainly oval and “butterfly,” while in the σh-type stress field, the shape of the plastic zone of the roadway surrounding rock is mainly oval. The laboratory test proves that the stress gradient has an important effect on the damage degree of the surrounding rock of the roadway. The larger the stress gradient, the higher the strength of the rock mass and the more severe the damage. The change of the stress lode angle will affect the distribution law of the stress gradient of the surrounding rock of the roadway, thus affecting the degree of fragmentation of the surrounding rock. In type σv and type σH stress fields, the surrounding rock of the shoulder can be regarded as a key part of the roadway. In the σh-type stress field, the plastic zones of the surrounding rocks of the roadway are more evenly distributed, and the damage range is less affected by θ. The influence law of the stress lode angle on the stability of the roadway has been well verified by field observation, and effective support measures have been proposed.http://dx.doi.org/10.1155/2021/6617609 |
| spellingShingle | Yihong Liu Hongbao Zhao Lei Wang Tao Wang Dongliang Ji Rui Liu Analysis of Influence of Stress Lode Angle on Stability of Roadway Surrounding Rock Shock and Vibration |
| title | Analysis of Influence of Stress Lode Angle on Stability of Roadway Surrounding Rock |
| title_full | Analysis of Influence of Stress Lode Angle on Stability of Roadway Surrounding Rock |
| title_fullStr | Analysis of Influence of Stress Lode Angle on Stability of Roadway Surrounding Rock |
| title_full_unstemmed | Analysis of Influence of Stress Lode Angle on Stability of Roadway Surrounding Rock |
| title_short | Analysis of Influence of Stress Lode Angle on Stability of Roadway Surrounding Rock |
| title_sort | analysis of influence of stress lode angle on stability of roadway surrounding rock |
| url | http://dx.doi.org/10.1155/2021/6617609 |
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