Study on Occurrence Mechanism of Coal Pillar in L-Shaped Zone during Fully Mechanized Mining Period and Prevention Technology
In order to study the occurrence mechanism of rock burst in L-shaped zone during a fully mechanized mining period, the No. 705 working face which is located in Baojishan Colliery is taken as a typical engineering background. By means of in situ investigation, theoretical analysis, numerical simulati...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/6638009 |
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| _version_ | 1832550812138602496 |
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| author | Zeng-qiang Yang Hong-mei Wang De-quan Sun Xian-jian Ma Ming-bao Xu Nai-xin Si |
| author_facet | Zeng-qiang Yang Hong-mei Wang De-quan Sun Xian-jian Ma Ming-bao Xu Nai-xin Si |
| author_sort | Zeng-qiang Yang |
| collection | DOAJ |
| description | In order to study the occurrence mechanism of rock burst in L-shaped zone during a fully mechanized mining period, the No. 705 working face which is located in Baojishan Colliery is taken as a typical engineering background. By means of in situ investigation, theoretical analysis, numerical simulation, in situ tests, and relevant monitoring methods, the occurrence mechanism of rock burst and corresponding prevention technology are studied. The results show that a coal pillar with some confining pressure in the L-shaped zone is established by FLAC3D numerical simulation software, and the numerical simulation results indicate that the change in static load has a greater effect than dynamic load on coal pillar unstable failure; the static load plays a role in storing energy, and dynamic load plays a role in inducing rock burst; the bolt-mesh-cable support and high-pressure water jet unloading combined technology is put forward to prevent rock burst in roadways, and the numerical simulation results show that stress distribution of surrounding rock meets the model of strong-soft-strong (3S) structure, and the moment distribution is reasonable. In the follow-up mining, a limit value of coal fines is used to determine that this measure is a reasonable method to prevent rock burst. The study conclusions provide theoretical foundation and new guidance for preventing rock burst by synergistic effect technology in roadways. |
| format | Article |
| id | doaj-art-09deac7c6c1d4ab0a1d51738d6b465d5 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-09deac7c6c1d4ab0a1d51738d6b465d52025-02-03T06:05:43ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/66380096638009Study on Occurrence Mechanism of Coal Pillar in L-Shaped Zone during Fully Mechanized Mining Period and Prevention TechnologyZeng-qiang Yang0Hong-mei Wang1De-quan Sun2Xian-jian Ma3Ming-bao Xu4Nai-xin Si5Shandong Province Engineering Laboratory of Deep Mine Rockburst Disaster Assessment, Jinan, Shandong 250104, ChinaShandong Province Engineering Laboratory of Deep Mine Rockburst Disaster Assessment, Jinan, Shandong 250104, ChinaShandong Province Engineering Laboratory of Deep Mine Rockburst Disaster Assessment, Jinan, Shandong 250104, ChinaShandong Province Engineering Laboratory of Deep Mine Rockburst Disaster Assessment, Jinan, Shandong 250104, ChinaShandong Province Engineering Laboratory of Deep Mine Rockburst Disaster Assessment, Jinan, Shandong 250104, ChinaShandong Province Engineering Laboratory of Deep Mine Rockburst Disaster Assessment, Jinan, Shandong 250104, ChinaIn order to study the occurrence mechanism of rock burst in L-shaped zone during a fully mechanized mining period, the No. 705 working face which is located in Baojishan Colliery is taken as a typical engineering background. By means of in situ investigation, theoretical analysis, numerical simulation, in situ tests, and relevant monitoring methods, the occurrence mechanism of rock burst and corresponding prevention technology are studied. The results show that a coal pillar with some confining pressure in the L-shaped zone is established by FLAC3D numerical simulation software, and the numerical simulation results indicate that the change in static load has a greater effect than dynamic load on coal pillar unstable failure; the static load plays a role in storing energy, and dynamic load plays a role in inducing rock burst; the bolt-mesh-cable support and high-pressure water jet unloading combined technology is put forward to prevent rock burst in roadways, and the numerical simulation results show that stress distribution of surrounding rock meets the model of strong-soft-strong (3S) structure, and the moment distribution is reasonable. In the follow-up mining, a limit value of coal fines is used to determine that this measure is a reasonable method to prevent rock burst. The study conclusions provide theoretical foundation and new guidance for preventing rock burst by synergistic effect technology in roadways.http://dx.doi.org/10.1155/2021/6638009 |
| spellingShingle | Zeng-qiang Yang Hong-mei Wang De-quan Sun Xian-jian Ma Ming-bao Xu Nai-xin Si Study on Occurrence Mechanism of Coal Pillar in L-Shaped Zone during Fully Mechanized Mining Period and Prevention Technology Shock and Vibration |
| title | Study on Occurrence Mechanism of Coal Pillar in L-Shaped Zone during Fully Mechanized Mining Period and Prevention Technology |
| title_full | Study on Occurrence Mechanism of Coal Pillar in L-Shaped Zone during Fully Mechanized Mining Period and Prevention Technology |
| title_fullStr | Study on Occurrence Mechanism of Coal Pillar in L-Shaped Zone during Fully Mechanized Mining Period and Prevention Technology |
| title_full_unstemmed | Study on Occurrence Mechanism of Coal Pillar in L-Shaped Zone during Fully Mechanized Mining Period and Prevention Technology |
| title_short | Study on Occurrence Mechanism of Coal Pillar in L-Shaped Zone during Fully Mechanized Mining Period and Prevention Technology |
| title_sort | study on occurrence mechanism of coal pillar in l shaped zone during fully mechanized mining period and prevention technology |
| url | http://dx.doi.org/10.1155/2021/6638009 |
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