Study on induced mechanism of slurry splitting deviation and diffusion in long hole grouting near faults
Affected by complex hydro-geological conditions, mine production is facing serious water hazards, with water inrush and sudden water accidents occurring from time to time. Advanced area grouting has become one of the main methods for preventing and controlling pressurized water hazards on coal seam...
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| Format: | Article |
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Editorial Office of Safety in Coal Mines
2025-05-01
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| Series: | Meikuang Anquan |
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| Online Access: | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20241315 |
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| author | Lianchong LI Xinrui LI Wenqiang MU Yunchun HAN Yongshu ZHANG |
| author_facet | Lianchong LI Xinrui LI Wenqiang MU Yunchun HAN Yongshu ZHANG |
| author_sort | Lianchong LI |
| collection | DOAJ |
| description | Affected by complex hydro-geological conditions, mine production is facing serious water hazards, with water inrush and sudden water accidents occurring from time to time. Advanced area grouting has become one of the main methods for preventing and controlling pressurized water hazards on coal seam floor. However, due to the heterogeneity of floor lithology and the complexity of geological structures such as faults and fractures, problems such as slurry leakage, seepage, and local undergrouting often occur during the grouting process, seriously affecting the grouting effect and the reliability of waterproof reinforcement. Based on the data of the grouting project in Xieqiao coal mine area, the vertical spatial distance between the fault and the grouting hole is defined as the fault distance. The simulation analysis of the slurry splitting and diffusion mechanism under different fault distances is carried out. The research focuses on the diffusion path, splitting mode, stress field changes, and micro-seismic monitoring response deviation of the slurry near the fault, revealing the influence law of different fault distances on the slurry splitting and diffusion characteristics, the direction of splitting stress, and the micro-seismic monitoring response deviation characteristics. The results show that under the combined action of in-situ stress fault grout pore pressure, the dynamic change of the maximum principal stress has an inducing effect on the deviation of grouting splitting diffusion direction to one side, and the influence range of this type has a limit value, which is affected by conditions such as fault trace length, dip angle, and ground stress; under the designed grouting engineering conditions, the influence distance of the fault on the grouting splitting diffusion reached 40 meters. Within this 40 m range, the presence of faults will cause the slurry to preferentially diffuse towards one side of the fault, significantly affecting its propagation path and splitting mode; the fault will affect the stress intensity factor KIC of the grout splitting I-II composite crack before grouting, causing changes in the grouting direction and splitting pressure. |
| format | Article |
| id | doaj-art-b0a8c87d0fbf447d818e1d2566ee2b21 |
| institution | OA Journals |
| issn | 1003-496X |
| language | zho |
| publishDate | 2025-05-01 |
| publisher | Editorial Office of Safety in Coal Mines |
| record_format | Article |
| series | Meikuang Anquan |
| spelling | doaj-art-b0a8c87d0fbf447d818e1d2566ee2b212025-08-20T02:25:12ZzhoEditorial Office of Safety in Coal MinesMeikuang Anquan1003-496X2025-05-0156515917110.13347/j.cnki.mkaq.20241315gMKAQ20241315Study on induced mechanism of slurry splitting deviation and diffusion in long hole grouting near faultsLianchong LI0Xinrui LI1Wenqiang MU2Yunchun HAN3Yongshu ZHANG4School of Resources and Civil Engineering, Northeastern University, Shenyang 110819, ChinaSchool of Resources and Civil Engineering, Northeastern University, Shenyang 110819, ChinaSchool of Resources and Civil Engineering, Northeastern University, Shenyang 110819, ChinaNational Key Laboratory of Deep Coal Safety Mining and Environmental Protection, Huainan Mining Group Co., Ltd., Huainan 232000, ChinaSchool of Resources and Civil Engineering, Northeastern University, Shenyang 110819, ChinaAffected by complex hydro-geological conditions, mine production is facing serious water hazards, with water inrush and sudden water accidents occurring from time to time. Advanced area grouting has become one of the main methods for preventing and controlling pressurized water hazards on coal seam floor. However, due to the heterogeneity of floor lithology and the complexity of geological structures such as faults and fractures, problems such as slurry leakage, seepage, and local undergrouting often occur during the grouting process, seriously affecting the grouting effect and the reliability of waterproof reinforcement. Based on the data of the grouting project in Xieqiao coal mine area, the vertical spatial distance between the fault and the grouting hole is defined as the fault distance. The simulation analysis of the slurry splitting and diffusion mechanism under different fault distances is carried out. The research focuses on the diffusion path, splitting mode, stress field changes, and micro-seismic monitoring response deviation of the slurry near the fault, revealing the influence law of different fault distances on the slurry splitting and diffusion characteristics, the direction of splitting stress, and the micro-seismic monitoring response deviation characteristics. The results show that under the combined action of in-situ stress fault grout pore pressure, the dynamic change of the maximum principal stress has an inducing effect on the deviation of grouting splitting diffusion direction to one side, and the influence range of this type has a limit value, which is affected by conditions such as fault trace length, dip angle, and ground stress; under the designed grouting engineering conditions, the influence distance of the fault on the grouting splitting diffusion reached 40 meters. Within this 40 m range, the presence of faults will cause the slurry to preferentially diffuse towards one side of the fault, significantly affecting its propagation path and splitting mode; the fault will affect the stress intensity factor KIC of the grout splitting I-II composite crack before grouting, causing changes in the grouting direction and splitting pressure.https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20241315long borehole groutingmine water inrushfault inductionslurry splitting deviationmicro-seismic monitoring |
| spellingShingle | Lianchong LI Xinrui LI Wenqiang MU Yunchun HAN Yongshu ZHANG Study on induced mechanism of slurry splitting deviation and diffusion in long hole grouting near faults Meikuang Anquan long borehole grouting mine water inrush fault induction slurry splitting deviation micro-seismic monitoring |
| title | Study on induced mechanism of slurry splitting deviation and diffusion in long hole grouting near faults |
| title_full | Study on induced mechanism of slurry splitting deviation and diffusion in long hole grouting near faults |
| title_fullStr | Study on induced mechanism of slurry splitting deviation and diffusion in long hole grouting near faults |
| title_full_unstemmed | Study on induced mechanism of slurry splitting deviation and diffusion in long hole grouting near faults |
| title_short | Study on induced mechanism of slurry splitting deviation and diffusion in long hole grouting near faults |
| title_sort | study on induced mechanism of slurry splitting deviation and diffusion in long hole grouting near faults |
| topic | long borehole grouting mine water inrush fault induction slurry splitting deviation micro-seismic monitoring |
| url | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20241315 |
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