Rockburst mechanism and prevention technology for wide coal pillar return airway
Abstract In the Shaanxi‐Inner Mongolia region, where most mines employ wide coal pillar retention and dual entry layout techniques, mining pressure manifestations frequently occur during working face retreatment, posing significant challenges to safe and efficient coal production. Based on numerical...
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| Format: | Article |
| Language: | English |
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Wiley
2024-11-01
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| Series: | Energy Science & Engineering |
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| Online Access: | https://doi.org/10.1002/ese3.1922 |
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| _version_ | 1841557251350855680 |
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| author | Zhensuo Wang Yongli Liu ZhiXiang Song Li Cong Yongtao Zhu |
| author_facet | Zhensuo Wang Yongli Liu ZhiXiang Song Li Cong Yongtao Zhu |
| author_sort | Zhensuo Wang |
| collection | DOAJ |
| description | Abstract In the Shaanxi‐Inner Mongolia region, where most mines employ wide coal pillar retention and dual entry layout techniques, mining pressure manifestations frequently occur during working face retreatment, posing significant challenges to safe and efficient coal production. Based on numerical simulation, theoretical analysis, and field test research, this study proposes a technical solution for preventing rockburst hazards in a wide coal pillar return airway. The research findings indicate the following: (a) Through numerical simulation and theoretical analysis, during the working face retreatment process, the wide coal pillar return airway exhibits a characteristic h‐pattern of high‐stress distribution, with asymmetric camelback curves appearing within the wide coal pillar, leading to significant static load concentration. When the roof breaks, the coal pillar bends excessively, and a large amount of energy is released, potentially causing instability. (b) Through the numerical simulation analysis, the stress peak value of the two sides of the return air lane of 21,103 working face decreases the most when the hole length is 15 m, the hole diameter is 150 mm and the hole distance is 1 m. (c) Implementation of drilling relief with a large diameter in the field effectively alleviates the issue of the return airway adjacent to the wide coal pillar, causing the stress peaks to shift deeper into the rock mass, this significantly reduces the risk of rockburst occurrence. |
| format | Article |
| id | doaj-art-9716d1a1ae3942f4ac7b608ccd54c03c |
| institution | Kabale University |
| issn | 2050-0505 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Wiley |
| record_format | Article |
| series | Energy Science & Engineering |
| spelling | doaj-art-9716d1a1ae3942f4ac7b608ccd54c03c2025-01-06T14:45:33ZengWileyEnergy Science & Engineering2050-05052024-11-0112114991500710.1002/ese3.1922Rockburst mechanism and prevention technology for wide coal pillar return airwayZhensuo Wang0Yongli Liu1ZhiXiang Song2Li Cong3Yongtao Zhu4College of Safety Engineering Heilongjiang University of Science and Technology Harbin ChinaCollege of Mining Engineering Heilongjiang University of Science and Technology Harbin ChinaSchool of Energy and Mining Engineering China University of Mining and Technology (Beijing) Beijing ChinaCollege of Safety Engineering Heilongjiang University of Science and Technology Harbin ChinaCollege of Safety Engineering Heilongjiang University of Science and Technology Harbin ChinaAbstract In the Shaanxi‐Inner Mongolia region, where most mines employ wide coal pillar retention and dual entry layout techniques, mining pressure manifestations frequently occur during working face retreatment, posing significant challenges to safe and efficient coal production. Based on numerical simulation, theoretical analysis, and field test research, this study proposes a technical solution for preventing rockburst hazards in a wide coal pillar return airway. The research findings indicate the following: (a) Through numerical simulation and theoretical analysis, during the working face retreatment process, the wide coal pillar return airway exhibits a characteristic h‐pattern of high‐stress distribution, with asymmetric camelback curves appearing within the wide coal pillar, leading to significant static load concentration. When the roof breaks, the coal pillar bends excessively, and a large amount of energy is released, potentially causing instability. (b) Through the numerical simulation analysis, the stress peak value of the two sides of the return air lane of 21,103 working face decreases the most when the hole length is 15 m, the hole diameter is 150 mm and the hole distance is 1 m. (c) Implementation of drilling relief with a large diameter in the field effectively alleviates the issue of the return airway adjacent to the wide coal pillar, causing the stress peaks to shift deeper into the rock mass, this significantly reduces the risk of rockburst occurrence.https://doi.org/10.1002/ese3.1922drilling relief with large diameterreturn airwayrockburstwide coal pillar |
| spellingShingle | Zhensuo Wang Yongli Liu ZhiXiang Song Li Cong Yongtao Zhu Rockburst mechanism and prevention technology for wide coal pillar return airway Energy Science & Engineering drilling relief with large diameter return airway rockburst wide coal pillar |
| title | Rockburst mechanism and prevention technology for wide coal pillar return airway |
| title_full | Rockburst mechanism and prevention technology for wide coal pillar return airway |
| title_fullStr | Rockburst mechanism and prevention technology for wide coal pillar return airway |
| title_full_unstemmed | Rockburst mechanism and prevention technology for wide coal pillar return airway |
| title_short | Rockburst mechanism and prevention technology for wide coal pillar return airway |
| title_sort | rockburst mechanism and prevention technology for wide coal pillar return airway |
| topic | drilling relief with large diameter return airway rockburst wide coal pillar |
| url | https://doi.org/10.1002/ese3.1922 |
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