Study on Failure Characteristics and Control Technology of Roadway Surrounding Rock under Repeated Mining in Close-Distance Coal Seam
In this study, taking the Sheng’an coal mine as an engineering background, the failure characteristics of the surrounding rock of a roadway under repeated mining in a close-distance coal seam is comprehensively illustrated through field measurements (e.g., drilling imaging), theory analysis and nume...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-06-01
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| Series: | Mathematics |
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| Online Access: | https://www.mdpi.com/2227-7390/10/13/2166 |
| _version_ | 1797408678251331584 |
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| author | Yuqi Shang Dezhong Kong Shijiang Pu Yu Xiong Qiang Li Zhanbo Cheng |
| author_facet | Yuqi Shang Dezhong Kong Shijiang Pu Yu Xiong Qiang Li Zhanbo Cheng |
| author_sort | Yuqi Shang |
| collection | DOAJ |
| description | In this study, taking the Sheng’an coal mine as an engineering background, the failure characteristics of the surrounding rock of a roadway under repeated mining in a close-distance coal seam is comprehensively illustrated through field measurements (e.g., drilling imaging), theory analysis and numerical simulation (finite difference method (FDM)). The results show that although the return airway 10905 remains intact, the apparent failure of the roadway’s roof and the coal pillar can be observed. In addition, the expression of floor failure depth caused by upper coal seam mining is obtained through elastic-plastic theory. Meanwhile, the deformation of the surrounding rock of the roadway increases with the increase of repeated mining times, especially for the horizontal displacement of the roadway on the coal pillar side. Moreover, the cracks’ evolution of surrounding rock in the roadway can be observed as asymmetric characteristics. Finally, the stability control technology of “asymmetric anchor net cable + I-steel” is proposed to prevent potential mining disasters, and the feasibility of this support scheme is verified by numerical simulation and field practices. It can meet the requirement of safe mining and provide guidelines to effectively solve the failure of a roadway in close-distance coal seam mining. |
| first_indexed | 2024-03-09T04:02:56Z |
| format | Article |
| id | doaj.art-d0b7bdf50aae421e9a25ec0242fd36b7 |
| institution | Directory Open Access Journal |
| issn | 2227-7390 |
| language | English |
| last_indexed | 2024-03-09T04:02:56Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Mathematics |
| spelling | doaj.art-d0b7bdf50aae421e9a25ec0242fd36b72023-12-03T14:11:30ZengMDPI AGMathematics2227-73902022-06-011013216610.3390/math10132166Study on Failure Characteristics and Control Technology of Roadway Surrounding Rock under Repeated Mining in Close-Distance Coal SeamYuqi Shang0Dezhong Kong1Shijiang Pu2Yu Xiong3Qiang Li4Zhanbo Cheng5College of Mining, Guizhou University, Guiyang 550025, ChinaCollege of Mining, Guizhou University, Guiyang 550025, ChinaFaculty of Land and Resources Engineering, Kunming University of Science and Technology, Kunming 650093, ChinaCollege of Mining, Guizhou University, Guiyang 550025, ChinaCollege of Mining, Guizhou University, Guiyang 550025, ChinaSchool of Engineering, University of Warwick, Coventry CV4 7AL, UKIn this study, taking the Sheng’an coal mine as an engineering background, the failure characteristics of the surrounding rock of a roadway under repeated mining in a close-distance coal seam is comprehensively illustrated through field measurements (e.g., drilling imaging), theory analysis and numerical simulation (finite difference method (FDM)). The results show that although the return airway 10905 remains intact, the apparent failure of the roadway’s roof and the coal pillar can be observed. In addition, the expression of floor failure depth caused by upper coal seam mining is obtained through elastic-plastic theory. Meanwhile, the deformation of the surrounding rock of the roadway increases with the increase of repeated mining times, especially for the horizontal displacement of the roadway on the coal pillar side. Moreover, the cracks’ evolution of surrounding rock in the roadway can be observed as asymmetric characteristics. Finally, the stability control technology of “asymmetric anchor net cable + I-steel” is proposed to prevent potential mining disasters, and the feasibility of this support scheme is verified by numerical simulation and field practices. It can meet the requirement of safe mining and provide guidelines to effectively solve the failure of a roadway in close-distance coal seam mining.https://www.mdpi.com/2227-7390/10/13/2166failure characteristicssurrounding rock of roadwayrepeated miningclose-distance coal seamstability control technology |
| spellingShingle | Yuqi Shang Dezhong Kong Shijiang Pu Yu Xiong Qiang Li Zhanbo Cheng Study on Failure Characteristics and Control Technology of Roadway Surrounding Rock under Repeated Mining in Close-Distance Coal Seam Mathematics failure characteristics surrounding rock of roadway repeated mining close-distance coal seam stability control technology |
| title | Study on Failure Characteristics and Control Technology of Roadway Surrounding Rock under Repeated Mining in Close-Distance Coal Seam |
| title_full | Study on Failure Characteristics and Control Technology of Roadway Surrounding Rock under Repeated Mining in Close-Distance Coal Seam |
| title_fullStr | Study on Failure Characteristics and Control Technology of Roadway Surrounding Rock under Repeated Mining in Close-Distance Coal Seam |
| title_full_unstemmed | Study on Failure Characteristics and Control Technology of Roadway Surrounding Rock under Repeated Mining in Close-Distance Coal Seam |
| title_short | Study on Failure Characteristics and Control Technology of Roadway Surrounding Rock under Repeated Mining in Close-Distance Coal Seam |
| title_sort | study on failure characteristics and control technology of roadway surrounding rock under repeated mining in close distance coal seam |
| topic | failure characteristics surrounding rock of roadway repeated mining close-distance coal seam stability control technology |
| url | https://www.mdpi.com/2227-7390/10/13/2166 |
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