Safety Status Monitoring of Operational Rock Bolts in Mining Roadways Under Mining-Induced Effects
This study focuses on the importance of the real-time monitoring of bolt loads in roadways affected by high-intensity mining and the limitations of conventional monitoring methods. Fiber Bragg grating (FBG) sensors were embedded and encapsulated in rock bolts, and tensile tests were conducted indoor...
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MDPI AG
2025-05-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/25/11/3486 |
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| author | Jianjun Dong Wenduo Ding Yu Qin Ke Gao |
| author_facet | Jianjun Dong Wenduo Ding Yu Qin Ke Gao |
| author_sort | Jianjun Dong |
| collection | DOAJ |
| description | This study focuses on the importance of the real-time monitoring of bolt loads in roadways affected by high-intensity mining and the limitations of conventional monitoring methods. Fiber Bragg grating (FBG) sensors were embedded and encapsulated in rock bolts, and tensile tests were conducted indoors to verify their feasibility. The research was conducted using the consolidated face of the Bultai Coal Mine in the Shendong Mining Area as the engineering background. Real-time monitoring wavelength data from the FBG bolt sensor were obtained through field tests. The analysis of the data aimed to assess the condition of the FBG sensor and variations in axial force within the service bolts of the mining roadway. Using these monitoring results, the real-time stability and safety of the roadway bolts were evaluated. The study indicates that as the working face advances, the axial force in the bolt progressively rises under the effect of mine pressure. The left gang bolt rod’s shaft force changes significantly, while the right gang’s change is relatively small. When the working face moves 60 m past the bolt rod, the axial force in the bolt rises sharply. Moreover, the axial force at different positions of the left and right gang bolts exhibits a distinct variation pattern. The real-time monitoring of bolt support in the return roadway provides essential data for assessing bolt safety. |
| format | Article |
| id | doaj-art-e7dae970e08b406bb2a4b99e8ecab267 |
| institution | Kabale University |
| issn | 1424-8220 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj-art-e7dae970e08b406bb2a4b99e8ecab2672025-08-20T03:46:38ZengMDPI AGSensors1424-82202025-05-012511348610.3390/s25113486Safety Status Monitoring of Operational Rock Bolts in Mining Roadways Under Mining-Induced EffectsJianjun Dong0Wenduo Ding1Yu Qin2Ke Gao3College of Safety Science and Engineering, Liaoning Technical University, Huludao 125105, ChinaCollege of Safety Science and Engineering, Liaoning Technical University, Huludao 125105, ChinaCollege of Safety Science and Engineering, Liaoning Technical University, Huludao 125105, ChinaCollege of Safety Science and Engineering, Liaoning Technical University, Huludao 125105, ChinaThis study focuses on the importance of the real-time monitoring of bolt loads in roadways affected by high-intensity mining and the limitations of conventional monitoring methods. Fiber Bragg grating (FBG) sensors were embedded and encapsulated in rock bolts, and tensile tests were conducted indoors to verify their feasibility. The research was conducted using the consolidated face of the Bultai Coal Mine in the Shendong Mining Area as the engineering background. Real-time monitoring wavelength data from the FBG bolt sensor were obtained through field tests. The analysis of the data aimed to assess the condition of the FBG sensor and variations in axial force within the service bolts of the mining roadway. Using these monitoring results, the real-time stability and safety of the roadway bolts were evaluated. The study indicates that as the working face advances, the axial force in the bolt progressively rises under the effect of mine pressure. The left gang bolt rod’s shaft force changes significantly, while the right gang’s change is relatively small. When the working face moves 60 m past the bolt rod, the axial force in the bolt rises sharply. Moreover, the axial force at different positions of the left and right gang bolts exhibits a distinct variation pattern. The real-time monitoring of bolt support in the return roadway provides essential data for assessing bolt safety.https://www.mdpi.com/1424-8220/25/11/3486mining-induced effectsmining roadwaysrock boltssafety state monitoring |
| spellingShingle | Jianjun Dong Wenduo Ding Yu Qin Ke Gao Safety Status Monitoring of Operational Rock Bolts in Mining Roadways Under Mining-Induced Effects Sensors mining-induced effects mining roadways rock bolts safety state monitoring |
| title | Safety Status Monitoring of Operational Rock Bolts in Mining Roadways Under Mining-Induced Effects |
| title_full | Safety Status Monitoring of Operational Rock Bolts in Mining Roadways Under Mining-Induced Effects |
| title_fullStr | Safety Status Monitoring of Operational Rock Bolts in Mining Roadways Under Mining-Induced Effects |
| title_full_unstemmed | Safety Status Monitoring of Operational Rock Bolts in Mining Roadways Under Mining-Induced Effects |
| title_short | Safety Status Monitoring of Operational Rock Bolts in Mining Roadways Under Mining-Induced Effects |
| title_sort | safety status monitoring of operational rock bolts in mining roadways under mining induced effects |
| topic | mining-induced effects mining roadways rock bolts safety state monitoring |
| url | https://www.mdpi.com/1424-8220/25/11/3486 |
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