Stability Control Mechanism of High-Stress Roadway Surrounding Rock by Roof Fracturing and Rock Mass Filling
Large deformation of roadway and coal bump failures have always been the focus in deep underground engineering. By considering the Lu’an mining district in China, the failure mode and stability improvement process of high-stress roadways were analysed with the field tests and numerical simulations....
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2021/6658317 |
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| author | Fuzhou Qi Zhanguo Ma Dangwei Yang Ning Li Bin Li Zhiliu Wang Weixia Ma |
| author_facet | Fuzhou Qi Zhanguo Ma Dangwei Yang Ning Li Bin Li Zhiliu Wang Weixia Ma |
| author_sort | Fuzhou Qi |
| collection | DOAJ |
| description | Large deformation of roadway and coal bump failures have always been the focus in deep underground engineering. By considering the Lu’an mining district in China, the failure mode and stability improvement process of high-stress roadways were analysed with the field tests and numerical simulations. The field test results showed that a great amount of deformation and serious damage occurred in surrounding rocks during panel retreat due to the suspended roof. A novel approach employing roof fracturing and collapsed rock filling effect was adopted to maintain the roadway stability. A numerical model was established with the Universal Distinct Element Code (UDEC) to research the fracturing characteristics between the roadway and gob roofs and the stress change in the surrounding rock. The modelling results demonstrated that, without fracturing roof, the peak vertical stress of the coal pillar was 18.3 MPa and the peak vertical stress of the virgin coal rib was 15.6 MPa. The roadway was in a state of high stress. With fracturing roof, the peak vertical stress of coal pillar was 9.3 MPa and the peak vertical stress of virgin coal rib was 13.4 MPa. The fractured rock mass in the gob expanded in volume and provided supporting resistance to the overlying strata, which relieved stress concentrations in the coal pillar. Field measurement results indicated that the roadway large deformation was successfully resolved during excavation and panel retreat after implementing the novel approach, providing useful references for the application of this novel approach in similar coal mines. |
| format | Article |
| id | doaj-art-032fa7ed0a5748a3930b6ba4de8cef7f |
| institution | Kabale University |
| issn | 1687-8086 1687-8094 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-032fa7ed0a5748a3930b6ba4de8cef7f2025-02-03T05:58:30ZengWileyAdvances in Civil Engineering1687-80861687-80942021-01-01202110.1155/2021/66583176658317Stability Control Mechanism of High-Stress Roadway Surrounding Rock by Roof Fracturing and Rock Mass FillingFuzhou Qi0Zhanguo Ma1Dangwei Yang2Ning Li3Bin Li4Zhiliu Wang5Weixia Ma6School of Civil & Architecture Engineering, Zhongyuan University of Technology, Zhengzhou 450007, Henan, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaPingdingshan Coal No. 10 mine, Pingdingshan 467000, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology, Xuzhou 221116, ChinaSchool of Civil & Architecture Engineering, Zhongyuan University of Technology, Zhengzhou 450007, Henan, ChinaSchool of Civil & Architecture Engineering, Zhongyuan University of Technology, Zhengzhou 450007, Henan, ChinaEarthquake Administration of Henan, Zhengzhou 450016, Henan, ChinaLarge deformation of roadway and coal bump failures have always been the focus in deep underground engineering. By considering the Lu’an mining district in China, the failure mode and stability improvement process of high-stress roadways were analysed with the field tests and numerical simulations. The field test results showed that a great amount of deformation and serious damage occurred in surrounding rocks during panel retreat due to the suspended roof. A novel approach employing roof fracturing and collapsed rock filling effect was adopted to maintain the roadway stability. A numerical model was established with the Universal Distinct Element Code (UDEC) to research the fracturing characteristics between the roadway and gob roofs and the stress change in the surrounding rock. The modelling results demonstrated that, without fracturing roof, the peak vertical stress of the coal pillar was 18.3 MPa and the peak vertical stress of the virgin coal rib was 15.6 MPa. The roadway was in a state of high stress. With fracturing roof, the peak vertical stress of coal pillar was 9.3 MPa and the peak vertical stress of virgin coal rib was 13.4 MPa. The fractured rock mass in the gob expanded in volume and provided supporting resistance to the overlying strata, which relieved stress concentrations in the coal pillar. Field measurement results indicated that the roadway large deformation was successfully resolved during excavation and panel retreat after implementing the novel approach, providing useful references for the application of this novel approach in similar coal mines.http://dx.doi.org/10.1155/2021/6658317 |
| spellingShingle | Fuzhou Qi Zhanguo Ma Dangwei Yang Ning Li Bin Li Zhiliu Wang Weixia Ma Stability Control Mechanism of High-Stress Roadway Surrounding Rock by Roof Fracturing and Rock Mass Filling Advances in Civil Engineering |
| title | Stability Control Mechanism of High-Stress Roadway Surrounding Rock by Roof Fracturing and Rock Mass Filling |
| title_full | Stability Control Mechanism of High-Stress Roadway Surrounding Rock by Roof Fracturing and Rock Mass Filling |
| title_fullStr | Stability Control Mechanism of High-Stress Roadway Surrounding Rock by Roof Fracturing and Rock Mass Filling |
| title_full_unstemmed | Stability Control Mechanism of High-Stress Roadway Surrounding Rock by Roof Fracturing and Rock Mass Filling |
| title_short | Stability Control Mechanism of High-Stress Roadway Surrounding Rock by Roof Fracturing and Rock Mass Filling |
| title_sort | stability control mechanism of high stress roadway surrounding rock by roof fracturing and rock mass filling |
| url | http://dx.doi.org/10.1155/2021/6658317 |
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