Stress transfer mechanism and engineering practice of hydraulic fracturing roof cutting in roadway
Aiming at the problem that the hard roof in the goaf is difficult to collapse, which causes severe mine pressure in the roadway, the transport roadway in the eighth mining area of Jingfang Coal Mine is taken as the engineering background, through theoretical analysis, numerical simulation and field...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Safety in Coal Mines
2025-06-01
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| Series: | Meikuang Anquan |
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| Online Access: | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20240103 |
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| author | Gu GONG Zenghui LIU Ruofei ZHANG Junbao ZHANG Ziyang WU Fantai MA |
| author_facet | Gu GONG Zenghui LIU Ruofei ZHANG Junbao ZHANG Ziyang WU Fantai MA |
| author_sort | Gu GONG |
| collection | DOAJ |
| description | Aiming at the problem that the hard roof in the goaf is difficult to collapse, which causes severe mine pressure in the roadway, the transport roadway in the eighth mining area of Jingfang Coal Mine is taken as the engineering background, through theoretical analysis, numerical simulation and field measurement, the stress transfer mechanism of the roadway is studied by using hydraulic fracturing technology. The results show that the optimal height of pre-splitting and roof cutting from the 3-8072 coal roadway to the coal pillar side is 25 m, and the optimal angle is 30°. After roof cutting, the high stress near the transport roadway in the mining area is obviously reduced, and the vertical stress on the coal pillar side is reduced from 33.79 MPa to 17.7 MPa, with a decrease of 47.6 %; after hydraulic fracturing, the arch foot of the transport roadway in the mining area is cut off, as a result, the arch foot moves to the right and remains stable for a long time due to the large structure of the macroscopic stress shell. Through this technology, the hanging roof structure of hard roof can be changed, and the transmission of high stress to roadway can be blocked, thus the roadway is effectively protected. |
| format | Article |
| id | doaj-art-366a97183dbe42578020e48ebbcd3a2b |
| institution | Kabale University |
| issn | 1003-496X |
| language | zho |
| publishDate | 2025-06-01 |
| publisher | Editorial Office of Safety in Coal Mines |
| record_format | Article |
| series | Meikuang Anquan |
| spelling | doaj-art-366a97183dbe42578020e48ebbcd3a2b2025-08-20T03:45:15ZzhoEditorial Office of Safety in Coal MinesMeikuang Anquan1003-496X2025-06-0156616517510.13347/j.cnki.mkaq.20240103zMKAQ20240103Stress transfer mechanism and engineering practice of hydraulic fracturing roof cutting in roadwayGu GONG0Zenghui LIU1Ruofei ZHANG2Junbao ZHANG3Ziyang WU4Fantai MA5School of Mining Engineering, Anhui University of Science and Technology, Huainan 232001, ChinaSchool of Mining Engineering, Anhui University of Science and Technology, Huainan 232001, ChinaSchool of Coal Engineering, Shanxi Datong University, Datong 037003, ChinaSchool of Mining Engineering, Anhui University of Science and Technology, Huainan 232001, ChinaSchool of Mining Engineering, Anhui University of Science and Technology, Huainan 232001, ChinaSchool of Mining Engineering, Anhui University of Science and Technology, Huainan 232001, ChinaAiming at the problem that the hard roof in the goaf is difficult to collapse, which causes severe mine pressure in the roadway, the transport roadway in the eighth mining area of Jingfang Coal Mine is taken as the engineering background, through theoretical analysis, numerical simulation and field measurement, the stress transfer mechanism of the roadway is studied by using hydraulic fracturing technology. The results show that the optimal height of pre-splitting and roof cutting from the 3-8072 coal roadway to the coal pillar side is 25 m, and the optimal angle is 30°. After roof cutting, the high stress near the transport roadway in the mining area is obviously reduced, and the vertical stress on the coal pillar side is reduced from 33.79 MPa to 17.7 MPa, with a decrease of 47.6 %; after hydraulic fracturing, the arch foot of the transport roadway in the mining area is cut off, as a result, the arch foot moves to the right and remains stable for a long time due to the large structure of the macroscopic stress shell. Through this technology, the hanging roof structure of hard roof can be changed, and the transmission of high stress to roadway can be blocked, thus the roadway is effectively protected.https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20240103roadway stabilityhydraulic fracturingroof cutting and pressure reliefhard roofroof weakeningnumerical simulation |
| spellingShingle | Gu GONG Zenghui LIU Ruofei ZHANG Junbao ZHANG Ziyang WU Fantai MA Stress transfer mechanism and engineering practice of hydraulic fracturing roof cutting in roadway Meikuang Anquan roadway stability hydraulic fracturing roof cutting and pressure relief hard roof roof weakening numerical simulation |
| title | Stress transfer mechanism and engineering practice of hydraulic fracturing roof cutting in roadway |
| title_full | Stress transfer mechanism and engineering practice of hydraulic fracturing roof cutting in roadway |
| title_fullStr | Stress transfer mechanism and engineering practice of hydraulic fracturing roof cutting in roadway |
| title_full_unstemmed | Stress transfer mechanism and engineering practice of hydraulic fracturing roof cutting in roadway |
| title_short | Stress transfer mechanism and engineering practice of hydraulic fracturing roof cutting in roadway |
| title_sort | stress transfer mechanism and engineering practice of hydraulic fracturing roof cutting in roadway |
| topic | roadway stability hydraulic fracturing roof cutting and pressure relief hard roof roof weakening numerical simulation |
| url | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20240103 |
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