Instability prediction model of remaining coal pillars under remining disturbance
Abstract To address the instability timing problem of residual coal pillars under mining disturbance, their stress migration law and instability mechanism were studied via numerical simulation, physical simulation, and engineering tests considering residual coal remining in the 3101 working face of...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Wiley
2023-06-01
|
| Series: | Energy Science & Engineering |
| Subjects: | |
| Online Access: | https://doi.org/10.1002/ese3.1433 |
| _version_ | 1797809748302626816 |
|---|---|
| author | Ye Tian Peilin Gong Tong Zhao Kang Yi Guang Wen |
| author_facet | Ye Tian Peilin Gong Tong Zhao Kang Yi Guang Wen |
| author_sort | Ye Tian |
| collection | DOAJ |
| description | Abstract To address the instability timing problem of residual coal pillars under mining disturbance, their stress migration law and instability mechanism were studied via numerical simulation, physical simulation, and engineering tests considering residual coal remining in the 3101 working face of the Shenghua Coal Industry. The results show that as the mining progresses, the stress concentrates on both sides of the remaining coal pillar and empty roadway. When the first coal pillar in front of the working face loses its bearing capacity, the stress is transmitted forward, resulting in the advanced collapse of the empty roadway roof and an excessive load on the second coal pillar in front of the working face. Additionally, the critical value prediction model of the coal pillar stability safety factor fs ${f}_{{
m{s}}}$ was constructed. If fs ${f}_{{
m{s}}}$ is less than the critical value during the repeated mining period, the remaining coal pillar must be reinforced. A hollow grouting crossed anchor is selected for coal pillar reinforcement; thus, realizing the safe mining of the remaining coal pillars. Our research results provide theoretical support for the safe secondary mining of coal in China and similar coal mines worldwide. |
| first_indexed | 2024-03-13T06:57:26Z |
| format | Article |
| id | doaj.art-f277444f3e9744e5ac251817b3d370b3 |
| institution | Directory Open Access Journal |
| issn | 2050-0505 |
| language | English |
| last_indexed | 2024-03-13T06:57:26Z |
| publishDate | 2023-06-01 |
| publisher | Wiley |
| record_format | Article |
| series | Energy Science & Engineering |
| spelling | doaj.art-f277444f3e9744e5ac251817b3d370b32023-06-07T07:06:26ZengWileyEnergy Science & Engineering2050-05052023-06-011161842185710.1002/ese3.1433Instability prediction model of remaining coal pillars under remining disturbanceYe Tian0Peilin Gong1Tong Zhao2Kang Yi3Guang Wen4College of Mining Technology Taiyuan University of Technology Taiyuan Shanxi Province ChinaCollege of Mining Technology Taiyuan University of Technology Taiyuan Shanxi Province ChinaKey Laboratory of In‐situ Modified Mining of Ministry of Education Taiyuan University of Technology Taiyuan Shanxi Province ChinaCollege of Mining Technology Taiyuan University of Technology Taiyuan Shanxi Province ChinaCollege of Mining Technology Taiyuan University of Technology Taiyuan Shanxi Province ChinaAbstract To address the instability timing problem of residual coal pillars under mining disturbance, their stress migration law and instability mechanism were studied via numerical simulation, physical simulation, and engineering tests considering residual coal remining in the 3101 working face of the Shenghua Coal Industry. The results show that as the mining progresses, the stress concentrates on both sides of the remaining coal pillar and empty roadway. When the first coal pillar in front of the working face loses its bearing capacity, the stress is transmitted forward, resulting in the advanced collapse of the empty roadway roof and an excessive load on the second coal pillar in front of the working face. Additionally, the critical value prediction model of the coal pillar stability safety factor fs ${f}_{{ m{s}}}$ was constructed. If fs ${f}_{{ m{s}}}$ is less than the critical value during the repeated mining period, the remaining coal pillar must be reinforced. A hollow grouting crossed anchor is selected for coal pillar reinforcement; thus, realizing the safe mining of the remaining coal pillars. Our research results provide theoretical support for the safe secondary mining of coal in China and similar coal mines worldwide.https://doi.org/10.1002/ese3.1433coal pillar instabilityengineering disturbancenumerical simulationresidual coal mining |
| spellingShingle | Ye Tian Peilin Gong Tong Zhao Kang Yi Guang Wen Instability prediction model of remaining coal pillars under remining disturbance Energy Science & Engineering coal pillar instability engineering disturbance numerical simulation residual coal mining |
| title | Instability prediction model of remaining coal pillars under remining disturbance |
| title_full | Instability prediction model of remaining coal pillars under remining disturbance |
| title_fullStr | Instability prediction model of remaining coal pillars under remining disturbance |
| title_full_unstemmed | Instability prediction model of remaining coal pillars under remining disturbance |
| title_short | Instability prediction model of remaining coal pillars under remining disturbance |
| title_sort | instability prediction model of remaining coal pillars under remining disturbance |
| topic | coal pillar instability engineering disturbance numerical simulation residual coal mining |
| url | https://doi.org/10.1002/ese3.1433 |
| work_keys_str_mv | AT yetian instabilitypredictionmodelofremainingcoalpillarsunderreminingdisturbance AT peilingong instabilitypredictionmodelofremainingcoalpillarsunderreminingdisturbance AT tongzhao instabilitypredictionmodelofremainingcoalpillarsunderreminingdisturbance AT kangyi instabilitypredictionmodelofremainingcoalpillarsunderreminingdisturbance AT guangwen instabilitypredictionmodelofremainingcoalpillarsunderreminingdisturbance |