Deformation and Failure Mechanism of Surrounding Rock in Mining-Influenced Roadway and the Control Technology
Aiming at the problem of surrounding rock deformation and failure of mining roadway and its control, a mechanical model of the circular roadway under the mining environment is established, and the implicit equation of the plastic zone boundary is derived. By analyzing the morphologic evolution law o...
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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/10.1155/2021/5588314 |
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| author | Jicheng Feng Shuaifeng Yin Zhiheng Cheng Jianjun Shi Haoyu Shi Haitao Xu Shuying Guo |
| author_facet | Jicheng Feng Shuaifeng Yin Zhiheng Cheng Jianjun Shi Haoyu Shi Haitao Xu Shuying Guo |
| author_sort | Jicheng Feng |
| collection | DOAJ |
| description | Aiming at the problem of surrounding rock deformation and failure of mining roadway and its control, a mechanical model of the circular roadway under the mining environment is established, and the implicit equation of the plastic zone boundary is derived. By analyzing the morphologic evolution law of the surrounding rock plastic zone in the mining roadway, the key factors affecting the morphologic change of the plastic zone are obtained, that is, the magnitude and direction of principal stress. The influence law of the magnitude and direction of principal stress on the plastic zone of the mining roadway is analyzed by using numerical simulation software, and the deformation and failure mechanism of surrounding rock of the mining roadway is revealed. The results showed that the size and morphology of the plastic zone were closely related to the confining pressure ratio (η). Taking the boundary of η valuing 1, the larger or smaller η value was, the more serious the deformation and failure of surrounding rock would be; the morphology of the plastic zone changed with the deflection of the principal stress, with the location of the maximum plastic zone influenced by the principal stress direction. For the surrounding rock control in the mining-influenced roadway, it is advised to take the following methods: firstly, it is necessary to consider how to reduce or remove the influence of mining on surrounding rock, improve the stress environment of surrounding rock, and reduce the failure depth of the plastic zone, so as to better maintain the roadway. Secondly, in view of the deformation and failure characteristics of the mining roadway, the fractional support method of “yielding first and then resisting” should be adopted, which applies the cable supplement support after mining instead of the one-off high-strength support during roadway excavation, so as to control the malignant expansion of the surrounding rock plastic zone and prevent roof falling accidents. |
| format | Article |
| id | doaj-art-6c7e5c91fa1c4724ab45a55a1f779d02 |
| 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-6c7e5c91fa1c4724ab45a55a1f779d022025-02-03T01:09:55ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/55883145588314Deformation and Failure Mechanism of Surrounding Rock in Mining-Influenced Roadway and the Control TechnologyJicheng Feng0Shuaifeng Yin1Zhiheng Cheng2Jianjun Shi3Haoyu Shi4Haitao Xu5Shuying Guo6Safety Engineering College, North China Institute of Science and Technology, Langfang 065201, ChinaSafety Engineering College, North China Institute of Science and Technology, Langfang 065201, ChinaSafety Engineering College, North China Institute of Science and Technology, Langfang 065201, ChinaSafety Engineering College, North China Institute of Science and Technology, Langfang 065201, ChinaSafety Engineering College, North China Institute of Science and Technology, Langfang 065201, ChinaSafety Engineering College, North China Institute of Science and Technology, Langfang 065201, ChinaSafety Engineering College, North China Institute of Science and Technology, Langfang 065201, ChinaAiming at the problem of surrounding rock deformation and failure of mining roadway and its control, a mechanical model of the circular roadway under the mining environment is established, and the implicit equation of the plastic zone boundary is derived. By analyzing the morphologic evolution law of the surrounding rock plastic zone in the mining roadway, the key factors affecting the morphologic change of the plastic zone are obtained, that is, the magnitude and direction of principal stress. The influence law of the magnitude and direction of principal stress on the plastic zone of the mining roadway is analyzed by using numerical simulation software, and the deformation and failure mechanism of surrounding rock of the mining roadway is revealed. The results showed that the size and morphology of the plastic zone were closely related to the confining pressure ratio (η). Taking the boundary of η valuing 1, the larger or smaller η value was, the more serious the deformation and failure of surrounding rock would be; the morphology of the plastic zone changed with the deflection of the principal stress, with the location of the maximum plastic zone influenced by the principal stress direction. For the surrounding rock control in the mining-influenced roadway, it is advised to take the following methods: firstly, it is necessary to consider how to reduce or remove the influence of mining on surrounding rock, improve the stress environment of surrounding rock, and reduce the failure depth of the plastic zone, so as to better maintain the roadway. Secondly, in view of the deformation and failure characteristics of the mining roadway, the fractional support method of “yielding first and then resisting” should be adopted, which applies the cable supplement support after mining instead of the one-off high-strength support during roadway excavation, so as to control the malignant expansion of the surrounding rock plastic zone and prevent roof falling accidents.http://dx.doi.org/10.1155/2021/5588314 |
| spellingShingle | Jicheng Feng Shuaifeng Yin Zhiheng Cheng Jianjun Shi Haoyu Shi Haitao Xu Shuying Guo Deformation and Failure Mechanism of Surrounding Rock in Mining-Influenced Roadway and the Control Technology Shock and Vibration |
| title | Deformation and Failure Mechanism of Surrounding Rock in Mining-Influenced Roadway and the Control Technology |
| title_full | Deformation and Failure Mechanism of Surrounding Rock in Mining-Influenced Roadway and the Control Technology |
| title_fullStr | Deformation and Failure Mechanism of Surrounding Rock in Mining-Influenced Roadway and the Control Technology |
| title_full_unstemmed | Deformation and Failure Mechanism of Surrounding Rock in Mining-Influenced Roadway and the Control Technology |
| title_short | Deformation and Failure Mechanism of Surrounding Rock in Mining-Influenced Roadway and the Control Technology |
| title_sort | deformation and failure mechanism of surrounding rock in mining influenced roadway and the control technology |
| url | http://dx.doi.org/10.1155/2021/5588314 |
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