Mechanical model and numerical simulation of the formation of karst collapse columns in the Huainan coalfield of Northern China
Karst collapse columns (KCCs) are channels where groundwater and gas gather, and they pose a great threat to mining safety. In this study, a mechanical model and criterion for the roof collapse of KCCs were established, and simulations were performed to analyze the formation mechanism of KCCs in the...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2023-07-01
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| Series: | Energy Exploration & Exploitation |
| Online Access: | https://doi.org/10.1177/01445987231168715 |
| _version_ | 1797794675412697088 |
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| author | Haitao Zhang Guangquan Xu Yanxi Zhang Ming Tang Gang Zhang Xiaoguo Liu |
| author_facet | Haitao Zhang Guangquan Xu Yanxi Zhang Ming Tang Gang Zhang Xiaoguo Liu |
| author_sort | Haitao Zhang |
| collection | DOAJ |
| description | Karst collapse columns (KCCs) are channels where groundwater and gas gather, and they pose a great threat to mining safety. In this study, a mechanical model and criterion for the roof collapse of KCCs were established, and simulations were performed to analyze the formation mechanism of KCCs in the Huainan coalfield of Northern China. The results showed that the roof collapse and upward development of KCCs were facilitated by increasing the cave radius of the KCC basement and decreasing the groundwater pressure, single-layer thickness of the roof strata, lateral pressure coefficient of the rock mass, and cohesion and internal friction angle between fractures. The KCC formation process in the Huainan coalfield could be divided into four stages: (I) early collapse, (II) middle-early rapid collapse, (III) middle-late slow collapse, and (IV) late filling compaction. The simulation results were generally consistent with actual KCCs observed in the Huainan coalfield, which verified the theoretical analysis. The results of this study provide an important reference for the formation mechanism and evolution of KCCs in Northern China. |
| first_indexed | 2024-03-13T03:06:23Z |
| format | Article |
| id | doaj.art-0ab7c3bbbb604fb2b361f55d655a70b0 |
| institution | Directory Open Access Journal |
| issn | 0144-5987 2048-4054 |
| language | English |
| last_indexed | 2024-03-13T03:06:23Z |
| publishDate | 2023-07-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Energy Exploration & Exploitation |
| spelling | doaj.art-0ab7c3bbbb604fb2b361f55d655a70b02023-06-26T21:33:24ZengSAGE PublishingEnergy Exploration & Exploitation0144-59872048-40542023-07-014110.1177/01445987231168715Mechanical model and numerical simulation of the formation of karst collapse columns in the Huainan coalfield of Northern ChinaHaitao Zhang0Guangquan Xu1Yanxi Zhang2Ming Tang3Gang Zhang4Xiaoguo Liu5 School of Earth and Environment, , Huainan, China School of Earth and Environment, , Huainan, China Department of Geology and Hydrogeology, Xieqiao Coal Mine, Huainan Mining Group Co., Ltd., Huainan, China Department of Geology and Hydrogeology, Zhangji Coal Mine, Huainan Mining Group Co., Ltd., Huainan, China Department of Geology and Hydrogeology, Xieqiao Coal Mine, Huainan Mining Group Co., Ltd., Huainan, China Department of Geology and Hydrogeology, Zhangji Coal Mine, Huainan Mining Group Co., Ltd., Huainan, ChinaKarst collapse columns (KCCs) are channels where groundwater and gas gather, and they pose a great threat to mining safety. In this study, a mechanical model and criterion for the roof collapse of KCCs were established, and simulations were performed to analyze the formation mechanism of KCCs in the Huainan coalfield of Northern China. The results showed that the roof collapse and upward development of KCCs were facilitated by increasing the cave radius of the KCC basement and decreasing the groundwater pressure, single-layer thickness of the roof strata, lateral pressure coefficient of the rock mass, and cohesion and internal friction angle between fractures. The KCC formation process in the Huainan coalfield could be divided into four stages: (I) early collapse, (II) middle-early rapid collapse, (III) middle-late slow collapse, and (IV) late filling compaction. The simulation results were generally consistent with actual KCCs observed in the Huainan coalfield, which verified the theoretical analysis. The results of this study provide an important reference for the formation mechanism and evolution of KCCs in Northern China.https://doi.org/10.1177/01445987231168715 |
| spellingShingle | Haitao Zhang Guangquan Xu Yanxi Zhang Ming Tang Gang Zhang Xiaoguo Liu Mechanical model and numerical simulation of the formation of karst collapse columns in the Huainan coalfield of Northern China Energy Exploration & Exploitation |
| title | Mechanical model and numerical simulation of the formation of karst collapse columns in the Huainan coalfield of Northern China |
| title_full | Mechanical model and numerical simulation of the formation of karst collapse columns in the Huainan coalfield of Northern China |
| title_fullStr | Mechanical model and numerical simulation of the formation of karst collapse columns in the Huainan coalfield of Northern China |
| title_full_unstemmed | Mechanical model and numerical simulation of the formation of karst collapse columns in the Huainan coalfield of Northern China |
| title_short | Mechanical model and numerical simulation of the formation of karst collapse columns in the Huainan coalfield of Northern China |
| title_sort | mechanical model and numerical simulation of the formation of karst collapse columns in the huainan coalfield of northern china |
| url | https://doi.org/10.1177/01445987231168715 |
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