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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| Published in | Shock and vibration Vol. 2021; no. 1 |
|---|---|
| Main Authors | , , , , |
| Format | Journal Article |
| Language | English |
| Published |
Cairo
Hindawi
2021
John Wiley & Sons, Inc Wiley |
| Subjects | |
| Online Access | Get full text |
| ISSN | 1070-9622 1875-9203 1875-9203 |
| DOI | 10.1155/2021/8851057 |
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| Abstract | 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. |
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| AbstractList | 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. |
| Audience | Academic |
| Author | Zhong, Zhilu Liu, Yongle Li, Wenxin Liu, Jinxiao Chen, Lianjun |
| Author_xml | – sequence: 1 givenname: Wenxin orcidid: 0000-0003-0759-8693 surname: Li fullname: Li, Wenxin organization: Mine Disaster Prevention and Control-Ministry of State Key Laboratory Breeding BaseShandong University of Science and Technology579 Qianwangang RdHuangdao DistrictQingdao 266590Chinasdust.edu.cn – sequence: 2 givenname: Jinxiao orcidid: 0000-0003-3213-521X surname: Liu fullname: Liu, Jinxiao organization: Mine Disaster Prevention and Control-Ministry of State Key Laboratory Breeding BaseShandong University of Science and Technology579 Qianwangang RdHuangdao DistrictQingdao 266590Chinasdust.edu.cn – sequence: 3 givenname: Lianjun orcidid: 0000-0002-6405-8055 surname: Chen fullname: Chen, Lianjun organization: Mine Disaster Prevention and Control-Ministry of State Key Laboratory Breeding BaseShandong University of Science and Technology579 Qianwangang RdHuangdao DistrictQingdao 266590Chinasdust.edu.cn – sequence: 4 givenname: Zhilu surname: Zhong fullname: Zhong, Zhilu organization: College of Energy and Mining EngineeringShandong University of Science and Technology579 Qianwangang RdHuangdao DistrictQingdao 266590Chinasdust.edu.cn – sequence: 5 givenname: Yongle orcidid: 0000-0003-0196-5050 surname: Liu fullname: Liu, Yongle organization: College of Energy and Mining EngineeringShandong University of Science and Technology579 Qianwangang RdHuangdao DistrictQingdao 266590Chinasdust.edu.cn |
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| Copyright | Copyright © 2021 Wenxin Li et al. COPYRIGHT 2021 John Wiley & Sons, Inc. Copyright © 2021 Wenxin Li et al. This is an open access article distributed under the Creative Commons Attribution License (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. https://creativecommons.org/licenses/by/4.0 |
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| Snippet | This paper analyzes the large deformation of roadway in three-soft coal seam under the influence of tectonic stress. Taking the auxiliary conveying uphill... This paper analyzes the large deformation of roadway in three‐soft coal seam under the influence of tectonic stress. Taking the auxiliary conveying uphill... |
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| SubjectTerms | Analysis Aquifers Bituminous coal Case studies Coal Coal industry Coal mines Control stability Deformation effects Failure mechanisms Grouting Lithology Mathematical models Mechanical tests Mineral industry Mining Mining industry Numerical models Roads & highways Rock properties Simulation methods Stress concentration Stress distribution Tectonics Tectonics (Geology) Underground cables |
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| Title | Roadway Support in Deep “Three-Soft” Coal Seam: A Case Study in Yili Mining Area, China |
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