Research on directional control blasting technology around the rock roadway of Fangezhuang Mine
In order to solve the problem of over excavation and poor surrounding shaping effect during the drilling and blasting of the rock roadway in Fangezhuang Mine, through indoor experiments, the physical and mechanical parameters of the surrounding rock were determined, and the HJC constitutive model pa...
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| Format: | Article |
| Language: | zho |
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Editorial Office of Safety in Coal Mines
2025-01-01
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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.20240540 |
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| author | Xiaoguang YANG Hengkai WANG Luxiang ZHAO |
| author_facet | Xiaoguang YANG Hengkai WANG Luxiang ZHAO |
| author_sort | Xiaoguang YANG |
| collection | DOAJ |
| description | In order to solve the problem of over excavation and poor surrounding shaping effect during the drilling and blasting of the rock roadway in Fangezhuang Mine, through indoor experiments, the physical and mechanical parameters of the surrounding rock were determined, and the HJC constitutive model parameters were calibrated. Through numerical simulation, the crack propagation laws of the rock under the action of ordinary explosives, slotted cartridge, 90°, 180°, and 270° protective wall casings were compared. The application effects of different control blasting techniques on peripheral eyes were compared through engineering experiments. The numerical simulation results show that the slotted cartridge can achieve directional fracture blasting well in the cutting seam direction, and the crack length in the non cutting seam direction is reduced by 56.71%. The curvature of the protective casing has a significant impact on the distribution of crushing zone and radial cracks. The crack length on the protective wall side of the 90° and 180° protective sleeves is decreased by 79.9% and 75.1%. The average length of cracks on the protective wall side of the 270° protective sleeve is decreased by 58.57%. The explosion load caused more damage to the rocks on the side of goaf. The engineering test results show that both the slotted cartridge and the protective wall casing can play a role in directional control blasting to a certain extent. Compared with ordinary explosives, the use of slotted cartridge reduces the amount of average over excavation by 158.33 mm. The average over excavation amount corresponding to the three types of curved wall protection sleeves is reduced by 63 mm, 125.67 mm, and 224.67 mm. The half eye mark rate increases with the curvature of the protective wall sleeve, and adjusting the curvature of the protective wall sleeve can improve the forming effect of the peripheral eyes. |
| format | Article |
| id | doaj-art-ffc58f8e97ea475ebf45cbe4c3ee0ea1 |
| institution | Kabale University |
| issn | 1003-496X |
| language | zho |
| publishDate | 2025-01-01 |
| publisher | Editorial Office of Safety in Coal Mines |
| record_format | Article |
| series | Meikuang Anquan |
| spelling | doaj-art-ffc58f8e97ea475ebf45cbe4c3ee0ea12025-01-15T04:32:08ZzhoEditorial Office of Safety in Coal MinesMeikuang Anquan1003-496X2025-01-0156112813610.13347/j.cnki.mkaq.20240540cMKAQ20240540Research on directional control blasting technology around the rock roadway of Fangezhuang MineXiaoguang YANG0Hengkai WANG1Luxiang ZHAO2Fangezhuang Mining Company, Kailuan Energy and Chemical Co., Ltd., Tangshan 063109, ChinaSchool of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaSchool of Mechanics and Civil Engineering, China University of Mining and Technology (Beijing), Beijing 100083, ChinaIn order to solve the problem of over excavation and poor surrounding shaping effect during the drilling and blasting of the rock roadway in Fangezhuang Mine, through indoor experiments, the physical and mechanical parameters of the surrounding rock were determined, and the HJC constitutive model parameters were calibrated. Through numerical simulation, the crack propagation laws of the rock under the action of ordinary explosives, slotted cartridge, 90°, 180°, and 270° protective wall casings were compared. The application effects of different control blasting techniques on peripheral eyes were compared through engineering experiments. The numerical simulation results show that the slotted cartridge can achieve directional fracture blasting well in the cutting seam direction, and the crack length in the non cutting seam direction is reduced by 56.71%. The curvature of the protective casing has a significant impact on the distribution of crushing zone and radial cracks. The crack length on the protective wall side of the 90° and 180° protective sleeves is decreased by 79.9% and 75.1%. The average length of cracks on the protective wall side of the 270° protective sleeve is decreased by 58.57%. The explosion load caused more damage to the rocks on the side of goaf. The engineering test results show that both the slotted cartridge and the protective wall casing can play a role in directional control blasting to a certain extent. Compared with ordinary explosives, the use of slotted cartridge reduces the amount of average over excavation by 158.33 mm. The average over excavation amount corresponding to the three types of curved wall protection sleeves is reduced by 63 mm, 125.67 mm, and 224.67 mm. The half eye mark rate increases with the curvature of the protective wall sleeve, and adjusting the curvature of the protective wall sleeve can improve the forming effect of the peripheral eyes.https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20240540slotted cartridgewall protection blastingnumerical simulationcrack propagationdirectional controlled blasting |
| spellingShingle | Xiaoguang YANG Hengkai WANG Luxiang ZHAO Research on directional control blasting technology around the rock roadway of Fangezhuang Mine Meikuang Anquan slotted cartridge wall protection blasting numerical simulation crack propagation directional controlled blasting |
| title | Research on directional control blasting technology around the rock roadway of Fangezhuang Mine |
| title_full | Research on directional control blasting technology around the rock roadway of Fangezhuang Mine |
| title_fullStr | Research on directional control blasting technology around the rock roadway of Fangezhuang Mine |
| title_full_unstemmed | Research on directional control blasting technology around the rock roadway of Fangezhuang Mine |
| title_short | Research on directional control blasting technology around the rock roadway of Fangezhuang Mine |
| title_sort | research on directional control blasting technology around the rock roadway of fangezhuang mine |
| topic | slotted cartridge wall protection blasting numerical simulation crack propagation directional controlled blasting |
| url | https://www.mkaqzz.com/cn/article/doi/10.13347/j.cnki.mkaq.20240540 |
| work_keys_str_mv | AT xiaoguangyang researchondirectionalcontrolblastingtechnologyaroundtherockroadwayoffangezhuangmine AT hengkaiwang researchondirectionalcontrolblastingtechnologyaroundtherockroadwayoffangezhuangmine AT luxiangzhao researchondirectionalcontrolblastingtechnologyaroundtherockroadwayoffangezhuangmine |