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: Wenxin Li, Jinxiao Liu, Lianjun Chen, Zhilu Zhong, Yongle Liu
Format: Article
Language:English
Published: Wiley 2021-01-01
Series:Shock and Vibration
Online Access:http://dx.doi.org/10.1155/2021/8851057
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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.
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institution Kabale University
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publishDate 2021-01-01
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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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