Advanced modeling of seepage dynamics and control strategies in thick coal seams under high-confined aquifer conditions: A case study
The hydraulic behavior of the connection between the floor failure area and the aquifer water-conductive zone is considered to be the root cause of mine water inrush disasters. Therefore, unraveling the floor failure mechanism is particularly important for safe coal mining above the high-confined aq...
Saved in:
| Main Authors: | , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-01-01
|
| Series: | Alexandria Engineering Journal |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1110016824010925 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1832595957366128640 |
|---|---|
| author | Xuyang Chen Xufeng Wang Dongsheng Zhang Liang Chen Jiyao Wang Zechao Chang Dongdong Qin Hao Lv |
| author_facet | Xuyang Chen Xufeng Wang Dongsheng Zhang Liang Chen Jiyao Wang Zechao Chang Dongdong Qin Hao Lv |
| author_sort | Xuyang Chen |
| collection | DOAJ |
| description | The hydraulic behavior of the connection between the floor failure area and the aquifer water-conductive zone is considered to be the root cause of mine water inrush disasters. Therefore, unraveling the floor failure mechanism is particularly important for safe coal mining above the high-confined aquifer. This paper estimates the depth of the baseplate failure to be 18.4–27.3 m by combining network parallel electrical methods with drilling visualization technology. The FLAC3D-based numerical model considering the strain hardening of caved rock was established with rigorous calibration and verification. The results showed that the depth of damage to the floor is 23.1 m, and the dominating floor failure mechanism is shear failure caused by the vertical stress exceeding the rock bearing capacity. Moreover, the stress recovery process of the baseplate does not alter the failure morphology of the baseplate. Based on the above research findings, the in-situ floor control technique of the working face No. 4305 is proposed and practiced in the field. Field measurements show that floor control performance is satisfactory with water inflow in the goaf being roughly stable at 50 m3/h. Our results can provide useful reference for safe mining above confined aquifer and prevention and mitigation of water-related hazards. |
| format | Article |
| id | doaj-art-4a37d5f6cc87424e888be6662438d12d |
| institution | Kabale University |
| issn | 1110-0168 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Alexandria Engineering Journal |
| spelling | doaj-art-4a37d5f6cc87424e888be6662438d12d2025-01-18T05:03:31ZengElsevierAlexandria Engineering Journal1110-01682025-01-01111415431Advanced modeling of seepage dynamics and control strategies in thick coal seams under high-confined aquifer conditions: A case studyXuyang Chen0Xufeng Wang1Dongsheng Zhang2Liang Chen3Jiyao Wang4Zechao Chang5Dongdong Qin6Hao Lv7School of Mines, Jiangsu Engineering Laboratory of Mine Earthquake Monitoring and Prevention, China University of Mining & Technology, Xuzhou 221116, China; State Key Laboratory of Coal Resources and Safety Mining, China University of Mining & Technology, Xuzhou, Jiangsu 221116, ChinaSchool of Mines, Jiangsu Engineering Laboratory of Mine Earthquake Monitoring and Prevention, China University of Mining & Technology, Xuzhou 221116, China; State Key Laboratory of Coal Resources and Safety Mining, China University of Mining & Technology, Xuzhou, Jiangsu 221116, China; Corresponding author at: School of Mines, Jiangsu Engineering Laboratory of Mine Earthquake Monitoring and Prevention, China University of Mining & Technology, Xuzhou 221116, China.School of Mines, Jiangsu Engineering Laboratory of Mine Earthquake Monitoring and Prevention, China University of Mining & Technology, Xuzhou 221116, China; State Key Laboratory of Coal Resources and Safety Mining, China University of Mining & Technology, Xuzhou, Jiangsu 221116, ChinaSchool of Mines, Jiangsu Engineering Laboratory of Mine Earthquake Monitoring and Prevention, China University of Mining & Technology, Xuzhou 221116, China; State Key Laboratory of Coal Resources and Safety Mining, China University of Mining & Technology, Xuzhou, Jiangsu 221116, ChinaSchool of Mines, Jiangsu Engineering Laboratory of Mine Earthquake Monitoring and Prevention, China University of Mining & Technology, Xuzhou 221116, China; State Key Laboratory of Coal Resources and Safety Mining, China University of Mining & Technology, Xuzhou, Jiangsu 221116, ChinaSchool of Mines, Jiangsu Engineering Laboratory of Mine Earthquake Monitoring and Prevention, China University of Mining & Technology, Xuzhou 221116, China; State Key Laboratory of Coal Resources and Safety Mining, China University of Mining & Technology, Xuzhou, Jiangsu 221116, ChinaSchool of Mines, Jiangsu Engineering Laboratory of Mine Earthquake Monitoring and Prevention, China University of Mining & Technology, Xuzhou 221116, China; School of Mines, Shanxi Institute of Technology, Yangquan, Shanxi 045000, ChinaSchool of Mines, Jiangsu Engineering Laboratory of Mine Earthquake Monitoring and Prevention, China University of Mining & Technology, Xuzhou 221116, China; State Key Laboratory of Coal Resources and Safety Mining, China University of Mining & Technology, Xuzhou, Jiangsu 221116, ChinaThe hydraulic behavior of the connection between the floor failure area and the aquifer water-conductive zone is considered to be the root cause of mine water inrush disasters. Therefore, unraveling the floor failure mechanism is particularly important for safe coal mining above the high-confined aquifer. This paper estimates the depth of the baseplate failure to be 18.4–27.3 m by combining network parallel electrical methods with drilling visualization technology. The FLAC3D-based numerical model considering the strain hardening of caved rock was established with rigorous calibration and verification. The results showed that the depth of damage to the floor is 23.1 m, and the dominating floor failure mechanism is shear failure caused by the vertical stress exceeding the rock bearing capacity. Moreover, the stress recovery process of the baseplate does not alter the failure morphology of the baseplate. Based on the above research findings, the in-situ floor control technique of the working face No. 4305 is proposed and practiced in the field. Field measurements show that floor control performance is satisfactory with water inflow in the goaf being roughly stable at 50 m3/h. Our results can provide useful reference for safe mining above confined aquifer and prevention and mitigation of water-related hazards.http://www.sciencedirect.com/science/article/pii/S1110016824010925High-confined aquiferField observationNumerical simulationFloor failure mechanismIn-situ floor control |
| spellingShingle | Xuyang Chen Xufeng Wang Dongsheng Zhang Liang Chen Jiyao Wang Zechao Chang Dongdong Qin Hao Lv Advanced modeling of seepage dynamics and control strategies in thick coal seams under high-confined aquifer conditions: A case study Alexandria Engineering Journal High-confined aquifer Field observation Numerical simulation Floor failure mechanism In-situ floor control |
| title | Advanced modeling of seepage dynamics and control strategies in thick coal seams under high-confined aquifer conditions: A case study |
| title_full | Advanced modeling of seepage dynamics and control strategies in thick coal seams under high-confined aquifer conditions: A case study |
| title_fullStr | Advanced modeling of seepage dynamics and control strategies in thick coal seams under high-confined aquifer conditions: A case study |
| title_full_unstemmed | Advanced modeling of seepage dynamics and control strategies in thick coal seams under high-confined aquifer conditions: A case study |
| title_short | Advanced modeling of seepage dynamics and control strategies in thick coal seams under high-confined aquifer conditions: A case study |
| title_sort | advanced modeling of seepage dynamics and control strategies in thick coal seams under high confined aquifer conditions a case study |
| topic | High-confined aquifer Field observation Numerical simulation Floor failure mechanism In-situ floor control |
| url | http://www.sciencedirect.com/science/article/pii/S1110016824010925 |
| work_keys_str_mv | AT xuyangchen advancedmodelingofseepagedynamicsandcontrolstrategiesinthickcoalseamsunderhighconfinedaquiferconditionsacasestudy AT xufengwang advancedmodelingofseepagedynamicsandcontrolstrategiesinthickcoalseamsunderhighconfinedaquiferconditionsacasestudy AT dongshengzhang advancedmodelingofseepagedynamicsandcontrolstrategiesinthickcoalseamsunderhighconfinedaquiferconditionsacasestudy AT liangchen advancedmodelingofseepagedynamicsandcontrolstrategiesinthickcoalseamsunderhighconfinedaquiferconditionsacasestudy AT jiyaowang advancedmodelingofseepagedynamicsandcontrolstrategiesinthickcoalseamsunderhighconfinedaquiferconditionsacasestudy AT zechaochang advancedmodelingofseepagedynamicsandcontrolstrategiesinthickcoalseamsunderhighconfinedaquiferconditionsacasestudy AT dongdongqin advancedmodelingofseepagedynamicsandcontrolstrategiesinthickcoalseamsunderhighconfinedaquiferconditionsacasestudy AT haolv advancedmodelingofseepagedynamicsandcontrolstrategiesinthickcoalseamsunderhighconfinedaquiferconditionsacasestudy |