Research on the Fracture Properties and Mechanism of Carbon Dioxide Blasting Based on Rock-like Materials
Liquid carbon dioxide blasting technology has a wide range of applications and is characterized by sound fracturing effects, low vibration hazards, and high safety. In order to investigate the characteristics and mechanism of CO<sub>2</sub> phase change rock breaking, liquid CO<sub>...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Minerals |
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| Online Access: | https://www.mdpi.com/2075-163X/13/1/3 |
| _version_ | 1797438456773738496 |
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| author | Jian Chang Lijun Sun Bibo Dai Helin Li Zhenbiao Liu Xukun Zhao Bo Ke |
| author_facet | Jian Chang Lijun Sun Bibo Dai Helin Li Zhenbiao Liu Xukun Zhao Bo Ke |
| author_sort | Jian Chang |
| collection | DOAJ |
| description | Liquid carbon dioxide blasting technology has a wide range of applications and is characterized by sound fracturing effects, low vibration hazards, and high safety. In order to investigate the characteristics and mechanism of CO<sub>2</sub> phase change rock breaking, liquid CO<sub>2</sub> blasting tests on rock-like specimens were carried out in this paper. The results show that 130 MPa is the threshold value at which a CO<sub>2</sub> blasting system moves from dynamic tensile stress damage to dynamic pressure stress damage. When blasting pressures of 100 MPa and 70 MPa are used, the lumpiness ratio of the fragments does not change much as the strength of the rock changes, so a suitable blasting pressure should be chosen to improve the blasting effect. Under the impact of blast stress and high-pressure gas flow, cracks develop to form a rough failure surface. |
| first_indexed | 2024-03-09T11:38:10Z |
| format | Article |
| id | doaj.art-78d2a2e0d8274b558f430b0cb38f05bb |
| institution | Directory Open Access Journal |
| issn | 2075-163X |
| language | English |
| last_indexed | 2024-03-09T11:38:10Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Minerals |
| spelling | doaj.art-78d2a2e0d8274b558f430b0cb38f05bb2023-11-30T23:38:26ZengMDPI AGMinerals2075-163X2022-12-01131310.3390/min13010003Research on the Fracture Properties and Mechanism of Carbon Dioxide Blasting Based on Rock-like MaterialsJian Chang0Lijun Sun1Bibo Dai2Helin Li3Zhenbiao Liu4Xukun Zhao5Bo Ke6State Key Laboratory of Safety and Health for Metal Mines, Sinosteel Group Maanshan Mining Research Institute Co., Maanshan 243000, ChinaState Key Laboratory of Safety and Health for Metal Mines, Sinosteel Group Maanshan Mining Research Institute Co., Maanshan 243000, ChinaState Key Laboratory of Safety and Health for Metal Mines, Sinosteel Group Maanshan Mining Research Institute Co., Maanshan 243000, ChinaState Key Laboratory of Safety and Health for Metal Mines, Sinosteel Group Maanshan Mining Research Institute Co., Maanshan 243000, ChinaState Key Laboratory of Safety and Health for Metal Mines, Sinosteel Group Maanshan Mining Research Institute Co., Maanshan 243000, ChinaSchool of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, ChinaSchool of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, ChinaLiquid carbon dioxide blasting technology has a wide range of applications and is characterized by sound fracturing effects, low vibration hazards, and high safety. In order to investigate the characteristics and mechanism of CO<sub>2</sub> phase change rock breaking, liquid CO<sub>2</sub> blasting tests on rock-like specimens were carried out in this paper. The results show that 130 MPa is the threshold value at which a CO<sub>2</sub> blasting system moves from dynamic tensile stress damage to dynamic pressure stress damage. When blasting pressures of 100 MPa and 70 MPa are used, the lumpiness ratio of the fragments does not change much as the strength of the rock changes, so a suitable blasting pressure should be chosen to improve the blasting effect. Under the impact of blast stress and high-pressure gas flow, cracks develop to form a rough failure surface.https://www.mdpi.com/2075-163X/13/1/3liquid carbon dioxidenumber of fragmentsblasting pressurelumpiness factor ratio |
| spellingShingle | Jian Chang Lijun Sun Bibo Dai Helin Li Zhenbiao Liu Xukun Zhao Bo Ke Research on the Fracture Properties and Mechanism of Carbon Dioxide Blasting Based on Rock-like Materials Minerals liquid carbon dioxide number of fragments blasting pressure lumpiness factor ratio |
| title | Research on the Fracture Properties and Mechanism of Carbon Dioxide Blasting Based on Rock-like Materials |
| title_full | Research on the Fracture Properties and Mechanism of Carbon Dioxide Blasting Based on Rock-like Materials |
| title_fullStr | Research on the Fracture Properties and Mechanism of Carbon Dioxide Blasting Based on Rock-like Materials |
| title_full_unstemmed | Research on the Fracture Properties and Mechanism of Carbon Dioxide Blasting Based on Rock-like Materials |
| title_short | Research on the Fracture Properties and Mechanism of Carbon Dioxide Blasting Based on Rock-like Materials |
| title_sort | research on the fracture properties and mechanism of carbon dioxide blasting based on rock like materials |
| topic | liquid carbon dioxide number of fragments blasting pressure lumpiness factor ratio |
| url | https://www.mdpi.com/2075-163X/13/1/3 |
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