Physical Similarity Simulation of Closely Stacked Coal Seams Mined in Faulted Geological Environments: A Comprehensive Experimental Investigation
ABSTRACT The mining of closely stacked coal seams can be associated with complex stress fields, which makes mining difficult. In addition, closely stacked coal seams often coexist with faults and confined aquifers, further complicating mining activities. However, the study of closely stacked coal se...
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Wiley
2025-01-01
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| Series: | Energy Science & Engineering |
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| Online Access: | https://doi.org/10.1002/ese3.1997 |
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| author | Yapeng Zhao Liang Kong Gaowei Hu Peisen Zhang Yunkai Ji |
| author_facet | Yapeng Zhao Liang Kong Gaowei Hu Peisen Zhang Yunkai Ji |
| author_sort | Yapeng Zhao |
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| description | ABSTRACT The mining of closely stacked coal seams can be associated with complex stress fields, which makes mining difficult. In addition, closely stacked coal seams often coexist with faults and confined aquifers, further complicating mining activities. However, the study of closely stacked coal seams under complex geological conditions with faults (confined water) is very rare. In this study, an experimental approach was adopted to investigate the stress field and displacement field in rocks associated with closely stacked coal mining activity (complex geological conditions with faults and confined water). The materials used in the laboratory had similar physical properties to those present in the mining environment. The results showed that the overlying rock structure has three structural types and three caving forms. When the lower coal seam is mined, the collapse of the overlying strata is characterized by “caving with digging,” “no obvious periodic pressure step,” and “it is difficult to form a beam structure.” Faults function as a stress barrier, which makes it difficult for abutment pressure to cross a fault zone and form a stress concentration near the fault zone. When mining in faulted strata with confined water, there are three areas prone to water inrush, namely near the intersection with the fault zone and coal pillar, the boundary between the coal pillar and goaf, and the middle of the goaf. The research results are of great significance to the mining of closely stacked coal seams under complex geological conditions. |
| format | Article |
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| institution | Kabale University |
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| language | English |
| publishDate | 2025-01-01 |
| publisher | Wiley |
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| series | Energy Science & Engineering |
| spelling | doaj-art-f3380944ab8e446598c118cbe4cc867d2025-01-21T11:38:24ZengWileyEnergy Science & Engineering2050-05052025-01-0113129030810.1002/ese3.1997Physical Similarity Simulation of Closely Stacked Coal Seams Mined in Faulted Geological Environments: A Comprehensive Experimental InvestigationYapeng Zhao0Liang Kong1Gaowei Hu2Peisen Zhang3Yunkai Ji4Key Laboratory of Gas Hydrate Ministry of Natural Resources, Qingdao Institute of Marine Geology Qingdao ChinaSchool of Science, Qingdao University of Technology Qingdao ChinaKey Laboratory of Gas Hydrate Ministry of Natural Resources, Qingdao Institute of Marine Geology Qingdao ChinaNational Key Laboratory for Mine Disaster Prevention and Control Shandong University of Science and Technology Qingdao ChinaKey Laboratory of Gas Hydrate Ministry of Natural Resources, Qingdao Institute of Marine Geology Qingdao ChinaABSTRACT The mining of closely stacked coal seams can be associated with complex stress fields, which makes mining difficult. In addition, closely stacked coal seams often coexist with faults and confined aquifers, further complicating mining activities. However, the study of closely stacked coal seams under complex geological conditions with faults (confined water) is very rare. In this study, an experimental approach was adopted to investigate the stress field and displacement field in rocks associated with closely stacked coal mining activity (complex geological conditions with faults and confined water). The materials used in the laboratory had similar physical properties to those present in the mining environment. The results showed that the overlying rock structure has three structural types and three caving forms. When the lower coal seam is mined, the collapse of the overlying strata is characterized by “caving with digging,” “no obvious periodic pressure step,” and “it is difficult to form a beam structure.” Faults function as a stress barrier, which makes it difficult for abutment pressure to cross a fault zone and form a stress concentration near the fault zone. When mining in faulted strata with confined water, there are three areas prone to water inrush, namely near the intersection with the fault zone and coal pillar, the boundary between the coal pillar and goaf, and the middle of the goaf. The research results are of great significance to the mining of closely stacked coal seams under complex geological conditions.https://doi.org/10.1002/ese3.1997closely stacked coal seamsconfined aquiferfaultsoverlying stratasimilarity simulation |
| spellingShingle | Yapeng Zhao Liang Kong Gaowei Hu Peisen Zhang Yunkai Ji Physical Similarity Simulation of Closely Stacked Coal Seams Mined in Faulted Geological Environments: A Comprehensive Experimental Investigation Energy Science & Engineering closely stacked coal seams confined aquifer faults overlying strata similarity simulation |
| title | Physical Similarity Simulation of Closely Stacked Coal Seams Mined in Faulted Geological Environments: A Comprehensive Experimental Investigation |
| title_full | Physical Similarity Simulation of Closely Stacked Coal Seams Mined in Faulted Geological Environments: A Comprehensive Experimental Investigation |
| title_fullStr | Physical Similarity Simulation of Closely Stacked Coal Seams Mined in Faulted Geological Environments: A Comprehensive Experimental Investigation |
| title_full_unstemmed | Physical Similarity Simulation of Closely Stacked Coal Seams Mined in Faulted Geological Environments: A Comprehensive Experimental Investigation |
| title_short | Physical Similarity Simulation of Closely Stacked Coal Seams Mined in Faulted Geological Environments: A Comprehensive Experimental Investigation |
| title_sort | physical similarity simulation of closely stacked coal seams mined in faulted geological environments a comprehensive experimental investigation |
| topic | closely stacked coal seams confined aquifer faults overlying strata similarity simulation |
| url | https://doi.org/10.1002/ese3.1997 |
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