Roadway Support in Deep “Three-Soft” Coal Seam: A Case Study in Yili Mining Area, China
This paper analyzes the large deformation of roadway in three-soft coal seam under the influence of tectonic stress. Taking the auxiliary conveying uphill roadway in Yili No. 1 Coal Mine as the engineering background, the deformation and failure mechanism of the surrounding rock and the supporting t...
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| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Wiley
2021-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/8851057 |
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| _version_ | 1832554067288653824 |
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| author | Wenxin Li Jinxiao Liu Lianjun Chen Zhilu Zhong Yongle Liu |
| author_facet | Wenxin Li Jinxiao Liu Lianjun Chen Zhilu Zhong Yongle Liu |
| author_sort | Wenxin Li |
| collection | DOAJ |
| description | This paper analyzes the large deformation of roadway in three-soft coal seam under the influence of tectonic stress. Taking the auxiliary conveying uphill roadway in Yili No. 1 Coal Mine as the engineering background, the deformation and failure mechanism of the surrounding rock and the supporting technology were studied. First, the characteristics of stress field and the surrounding rock properties of deep mining area were investigated through geostress measurement and rock mechanical test. Then, the roadway deformation and the loose circle of the supporting structure were obtained. Based on the results from measurement and theoretical analysis, we proposed a concept, i.e., “Stress adjustment-Strengthening-Grouting-Secondary support.” A numerical model was established to analyze the stress distribution and the state of plasticity in the surrounding rock. According to the results of the geostress measurement and the numerical simulation, a combined support scheme was proposed, i.e., “Yielding bolt & Shotcreting” as the primary support and “Prestressed grouting anchor cable & U-shaped shed” as the secondary support. Finally, the underground practice showed that the proposed support scheme can effectively control the large deformation and maintain the long-term stability of the roadway in deep and three-soft coal seam. The proposed technology has guiding significance for the support design under similar mining conditions. |
| format | Article |
| id | doaj-art-1fca7e7ff33f421eb89bada96a54b17e |
| 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-1fca7e7ff33f421eb89bada96a54b17e2025-02-03T05:52:30ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/88510578851057Roadway Support in Deep “Three-Soft” Coal Seam: A Case Study in Yili Mining Area, ChinaWenxin Li0Jinxiao Liu1Lianjun Chen2Zhilu Zhong3Yongle Liu4Mine Disaster Prevention and Control-Ministry of State Key Laboratory Breeding Base, Shandong University of Science and Technology, 579 Qianwangang Rd, Huangdao District, Qingdao 266590, ChinaMine Disaster Prevention and Control-Ministry of State Key Laboratory Breeding Base, Shandong University of Science and Technology, 579 Qianwangang Rd, Huangdao District, Qingdao 266590, ChinaMine Disaster Prevention and Control-Ministry of State Key Laboratory Breeding Base, Shandong University of Science and Technology, 579 Qianwangang Rd, Huangdao District, Qingdao 266590, ChinaCollege of Energy and Mining Engineering, Shandong University of Science and Technology, 579 Qianwangang Rd, Huangdao District, Qingdao 266590, ChinaCollege of Energy and Mining Engineering, Shandong University of Science and Technology, 579 Qianwangang Rd, Huangdao District, Qingdao 266590, ChinaThis paper analyzes the large deformation of roadway in three-soft coal seam under the influence of tectonic stress. Taking the auxiliary conveying uphill roadway in Yili No. 1 Coal Mine as the engineering background, the deformation and failure mechanism of the surrounding rock and the supporting technology were studied. First, the characteristics of stress field and the surrounding rock properties of deep mining area were investigated through geostress measurement and rock mechanical test. Then, the roadway deformation and the loose circle of the supporting structure were obtained. Based on the results from measurement and theoretical analysis, we proposed a concept, i.e., “Stress adjustment-Strengthening-Grouting-Secondary support.” A numerical model was established to analyze the stress distribution and the state of plasticity in the surrounding rock. According to the results of the geostress measurement and the numerical simulation, a combined support scheme was proposed, i.e., “Yielding bolt & Shotcreting” as the primary support and “Prestressed grouting anchor cable & U-shaped shed” as the secondary support. Finally, the underground practice showed that the proposed support scheme can effectively control the large deformation and maintain the long-term stability of the roadway in deep and three-soft coal seam. The proposed technology has guiding significance for the support design under similar mining conditions.http://dx.doi.org/10.1155/2021/8851057 |
| spellingShingle | Wenxin Li Jinxiao Liu Lianjun Chen Zhilu Zhong Yongle Liu Roadway Support in Deep “Three-Soft” Coal Seam: A Case Study in Yili Mining Area, China Shock and Vibration |
| title | Roadway Support in Deep “Three-Soft” Coal Seam: A Case Study in Yili Mining Area, China |
| title_full | Roadway Support in Deep “Three-Soft” Coal Seam: A Case Study in Yili Mining Area, China |
| title_fullStr | Roadway Support in Deep “Three-Soft” Coal Seam: A Case Study in Yili Mining Area, China |
| title_full_unstemmed | Roadway Support in Deep “Three-Soft” Coal Seam: A Case Study in Yili Mining Area, China |
| title_short | Roadway Support in Deep “Three-Soft” Coal Seam: A Case Study in Yili Mining Area, China |
| title_sort | roadway support in deep three soft coal seam a case study in yili mining area china |
| url | http://dx.doi.org/10.1155/2021/8851057 |
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