Stability mechanism and countermeasure of the solid coal rib in deep gob-side entry retaining: Insights from theoretical analysis numerical simulation
The stability and integrity of the solid coal rib in deep gob-side entry retaining (GER) can be compromised due to the cyclic loading and unloading caused by mining-induced stress. This can lead to failure of the deep GER during depressurized mining operations. In this study, we focus on a specific...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-01-01
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| Series: | Heliyon |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2405844024002056 |
| _version_ | 1797328719296069632 |
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| author | Shiqiang Xu Zizheng Zhang Jinlin Xin Jianbiao Bai Xingen Ma Ren Zhai Wenda Wu |
| author_facet | Shiqiang Xu Zizheng Zhang Jinlin Xin Jianbiao Bai Xingen Ma Ren Zhai Wenda Wu |
| author_sort | Shiqiang Xu |
| collection | DOAJ |
| description | The stability and integrity of the solid coal rib in deep gob-side entry retaining (GER) can be compromised due to the cyclic loading and unloading caused by mining-induced stress. This can lead to failure of the deep GER during depressurized mining operations. In this study, we focus on a specific case at the 94103 working face in Qishan Coal Mine of Xuzhou Mining Bureau. We establish an engineering model that describes the interaction between the solid coal rib and the main roof in GER, aiming to elucidate the characteristics of main roof failure and instability throughout the entire GER process. this model particularly emphasizes the mechanical properties of the solid coal rib as a contributing factor. Additionally, developed a limit stress state model for evaluating bolt-supported plastic solid coal ribs, which helps determine appropriate support resistance levels to prevent two common forms of failure in these ribs. Furthermore, created a numerical calculation model to investigate different bolt conditions' impact on solid coal rib failure mechanisms. Finally, based on field monitoring data validation, we propose control measures for reinforcing solid coal ribs along with suggestions for roof support design and filling body construction schemes under similar geological conditions. These research findings offer valuable guidance for developing effective reinforcement strategies for filling bodies. |
| first_indexed | 2024-03-08T06:55:44Z |
| format | Article |
| id | doaj.art-35edb6913c534b15a6cad426d9235ae5 |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-03-08T06:55:44Z |
| publishDate | 2024-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-35edb6913c534b15a6cad426d9235ae52024-02-03T06:36:25ZengElsevierHeliyon2405-84402024-01-01102e24174Stability mechanism and countermeasure of the solid coal rib in deep gob-side entry retaining: Insights from theoretical analysis numerical simulationShiqiang Xu0Zizheng Zhang1Jinlin Xin2Jianbiao Bai3Xingen Ma4Ren Zhai5Wenda Wu6Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Goal Mines, Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines, Hunan University of Science and Technology, Xiangtan 411201, ChinaWork Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Goal Mines, Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines, Hunan University of Science and Technology, Xiangtan 411201, China; Corresponding author.Work Safety Key Lab on Prevention and Control of Gas and Roof Disasters for Southern Goal Mines, Hunan Provincial Key Laboratory of Safe Mining Techniques of Coal Mines, Hunan University of Science and Technology, Xiangtan 411201, ChinaState Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou 221116, China; School of Mining and Geology, Xinjiang Institute of Engineering, Urumqi 830023, ChinaHuaneng Coal Technology Research Co., China Huaneng, Beijing 100070, ChinaYankuang Energy Group CO., LTD. Jing NO.3 Coal Mine, Jining 272004, ChinaCollege of Mining Engineering, Taiyuan University of Technology, Taiyuan 030024, ChinaThe stability and integrity of the solid coal rib in deep gob-side entry retaining (GER) can be compromised due to the cyclic loading and unloading caused by mining-induced stress. This can lead to failure of the deep GER during depressurized mining operations. In this study, we focus on a specific case at the 94103 working face in Qishan Coal Mine of Xuzhou Mining Bureau. We establish an engineering model that describes the interaction between the solid coal rib and the main roof in GER, aiming to elucidate the characteristics of main roof failure and instability throughout the entire GER process. this model particularly emphasizes the mechanical properties of the solid coal rib as a contributing factor. Additionally, developed a limit stress state model for evaluating bolt-supported plastic solid coal ribs, which helps determine appropriate support resistance levels to prevent two common forms of failure in these ribs. Furthermore, created a numerical calculation model to investigate different bolt conditions' impact on solid coal rib failure mechanisms. Finally, based on field monitoring data validation, we propose control measures for reinforcing solid coal ribs along with suggestions for roof support design and filling body construction schemes under similar geological conditions. These research findings offer valuable guidance for developing effective reinforcement strategies for filling bodies.http://www.sciencedirect.com/science/article/pii/S2405844024002056Gob-side entry retainingSolid coal rib failurePlastic stateControl countermeasure |
| spellingShingle | Shiqiang Xu Zizheng Zhang Jinlin Xin Jianbiao Bai Xingen Ma Ren Zhai Wenda Wu Stability mechanism and countermeasure of the solid coal rib in deep gob-side entry retaining: Insights from theoretical analysis numerical simulation Heliyon Gob-side entry retaining Solid coal rib failure Plastic state Control countermeasure |
| title | Stability mechanism and countermeasure of the solid coal rib in deep gob-side entry retaining: Insights from theoretical analysis numerical simulation |
| title_full | Stability mechanism and countermeasure of the solid coal rib in deep gob-side entry retaining: Insights from theoretical analysis numerical simulation |
| title_fullStr | Stability mechanism and countermeasure of the solid coal rib in deep gob-side entry retaining: Insights from theoretical analysis numerical simulation |
| title_full_unstemmed | Stability mechanism and countermeasure of the solid coal rib in deep gob-side entry retaining: Insights from theoretical analysis numerical simulation |
| title_short | Stability mechanism and countermeasure of the solid coal rib in deep gob-side entry retaining: Insights from theoretical analysis numerical simulation |
| title_sort | stability mechanism and countermeasure of the solid coal rib in deep gob side entry retaining insights from theoretical analysis numerical simulation |
| topic | Gob-side entry retaining Solid coal rib failure Plastic state Control countermeasure |
| url | http://www.sciencedirect.com/science/article/pii/S2405844024002056 |
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