Dome Roof Fall Geohazards of Full-Seam Chamber with Ultra-Large Section in Coal Mine
The roof fall hazard is more likely to take place within chamber with ultra-large section, which would not only damage mechanical equipment, but also cause casualties. In this paper, the strap joint chamber of the Tashan coal mine is studied, and finite and discrete element method (FDEM) is used to...
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| Language: | English |
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MDPI AG
2019-09-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/9/18/3891 |
| _version_ | 1818979068092088320 |
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| author | Rui Gao Hongchun Xia Kun Fang Chunwang Zhang |
| author_facet | Rui Gao Hongchun Xia Kun Fang Chunwang Zhang |
| author_sort | Rui Gao |
| collection | DOAJ |
| description | The roof fall hazard is more likely to take place within chamber with ultra-large section, which would not only damage mechanical equipment, but also cause casualties. In this paper, the strap joint chamber of the Tashan coal mine is studied, and finite and discrete element method (FDEM) is used to establish the numerical model of the roof fall of the chamber dome. The simulation results show that the chamber dome mainly undergoes shear failure and forms a large number of cracks. With further development and penetration of cracks, a distinct roof separation is found in the chamber dome. When the crack develops to the dome surface of the chamber, under the effect of the mine pressure, the coal body is separated from the surface of the chamber and the roof fall hazard occurs. Based on the mechanism of roof fall hazard of the chamber dome, it is concluded that improving the shear strength of the surrounding rock and reducing the crack penetration are the main ways to control the roof fall. Therefore, the high-strength anchor bolt and cable support is adopted to fill the cracks and improve the shear strength of the surrounding rock. The result showed that the roof separation of the chamber dome in the field is confined to 0.012 m. The surrounding rock is well controlled and no roof fall occurs. |
| first_indexed | 2024-12-20T16:53:39Z |
| format | Article |
| id | doaj.art-3ed4de534a184b2690e958038f1e3ae9 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-20T16:53:39Z |
| publishDate | 2019-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-3ed4de534a184b2690e958038f1e3ae92022-12-21T19:32:46ZengMDPI AGApplied Sciences2076-34172019-09-01918389110.3390/app9183891app9183891Dome Roof Fall Geohazards of Full-Seam Chamber with Ultra-Large Section in Coal MineRui Gao0Hongchun Xia1Kun Fang2Chunwang Zhang3College of Mining Engineering, Taiyuan University of Technology, Shanxi 030024, ChinaCollege of Civil and Architectural Engineering, Dalian University, Dalian 116622, ChinaDepartment of Civil Engineering, University of Ottawa, Ottawa, ON K1N 6N5, CanadaCollege of Mining Engineering, Taiyuan University of Technology, Shanxi 030024, ChinaThe roof fall hazard is more likely to take place within chamber with ultra-large section, which would not only damage mechanical equipment, but also cause casualties. In this paper, the strap joint chamber of the Tashan coal mine is studied, and finite and discrete element method (FDEM) is used to establish the numerical model of the roof fall of the chamber dome. The simulation results show that the chamber dome mainly undergoes shear failure and forms a large number of cracks. With further development and penetration of cracks, a distinct roof separation is found in the chamber dome. When the crack develops to the dome surface of the chamber, under the effect of the mine pressure, the coal body is separated from the surface of the chamber and the roof fall hazard occurs. Based on the mechanism of roof fall hazard of the chamber dome, it is concluded that improving the shear strength of the surrounding rock and reducing the crack penetration are the main ways to control the roof fall. Therefore, the high-strength anchor bolt and cable support is adopted to fill the cracks and improve the shear strength of the surrounding rock. The result showed that the roof separation of the chamber dome in the field is confined to 0.012 m. The surrounding rock is well controlled and no roof fall occurs.https://www.mdpi.com/2076-3417/9/18/3891coal mineultra-large sectionfull-seam chamberroof fall hazardscontrol technology |
| spellingShingle | Rui Gao Hongchun Xia Kun Fang Chunwang Zhang Dome Roof Fall Geohazards of Full-Seam Chamber with Ultra-Large Section in Coal Mine Applied Sciences coal mine ultra-large section full-seam chamber roof fall hazards control technology |
| title | Dome Roof Fall Geohazards of Full-Seam Chamber with Ultra-Large Section in Coal Mine |
| title_full | Dome Roof Fall Geohazards of Full-Seam Chamber with Ultra-Large Section in Coal Mine |
| title_fullStr | Dome Roof Fall Geohazards of Full-Seam Chamber with Ultra-Large Section in Coal Mine |
| title_full_unstemmed | Dome Roof Fall Geohazards of Full-Seam Chamber with Ultra-Large Section in Coal Mine |
| title_short | Dome Roof Fall Geohazards of Full-Seam Chamber with Ultra-Large Section in Coal Mine |
| title_sort | dome roof fall geohazards of full seam chamber with ultra large section in coal mine |
| topic | coal mine ultra-large section full-seam chamber roof fall hazards control technology |
| url | https://www.mdpi.com/2076-3417/9/18/3891 |
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