Calculation Method of the Blasting Throwing Energy and Its Variation Affected by the Burden
Precise control of casting velocity and effective throwing kinetic energy conversion efficiency in blasting engineering are challenges. To provide a theoretical basis and reference for the implementation plan and fine construction of the cast blasting project, we study the problems of casting veloci...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-06-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/13/6524 |
| _version_ | 1797480947098058752 |
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| author | Yonghui Huang Zixiang Zhao Zhiyu Zhang Jiguo Zhou Hongchao Li Yanlin Li |
| author_facet | Yonghui Huang Zixiang Zhao Zhiyu Zhang Jiguo Zhou Hongchao Li Yanlin Li |
| author_sort | Yonghui Huang |
| collection | DOAJ |
| description | Precise control of casting velocity and effective throwing kinetic energy conversion efficiency in blasting engineering are challenges. To provide a theoretical basis and reference for the implementation plan and fine construction of the cast blasting project, we study the problems of casting velocity and energy consumption ratio of broken rock under the impact load of explosions in this manuscript. The calculation methods of casting velocity and throwing energy of broken rock under two blasting modes of spherical charge and cylindrical charge are established by using the theory of dimensional analysis and rock breaking by blasting. A large number of model tests are carried out by using high-speed photography. The results indicate that the casting velocity of broken rock after explosive initiation has two evident stages: instantaneous acceleration to a certain value and subsequent fluctuation; the velocity presents an ordinary distribution law with the step height, and the fitting correlation of high-speed photography results is more than 91%. With the minimum burden increasing from 0.12 m to 0.2 m, the energy consumption decreases from 1306.88 J to 747.49 J and the proportion of energy consumption decreases from 14.77% to 8.45%. |
| first_indexed | 2024-03-09T22:07:29Z |
| format | Article |
| id | doaj.art-777f3bf9a121421d8e6e7c131b598faf |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T22:07:29Z |
| publishDate | 2022-06-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-777f3bf9a121421d8e6e7c131b598faf2023-11-23T19:38:10ZengMDPI AGApplied Sciences2076-34172022-06-011213652410.3390/app12136524Calculation Method of the Blasting Throwing Energy and Its Variation Affected by the BurdenYonghui Huang0Zixiang Zhao1Zhiyu Zhang2Jiguo Zhou3Hongchao Li4Yanlin Li5Faculty of Electic Power Engineering, Kunming University of Science and Technology, Kunming 650500, ChinaFaculty of Electic Power Engineering, Kunming University of Science and Technology, Kunming 650500, ChinaFaculty of Land Resources Engineering, Kunming University of Science and Technology, Kunming 650093, ChinaDepartment of Resources and Environmental Engineering, Lanzhou Petrochemical University of Vecational Technology, Lanzhou 730207, ChinaFaculty of Urbanism, Kunming University of Science and Technology, Kunming 650051, ChinaKunming Prospecting Design Institute of China Nonferrous Metals Industry Company Limited Experimental Center, Kunming 650500, ChinaPrecise control of casting velocity and effective throwing kinetic energy conversion efficiency in blasting engineering are challenges. To provide a theoretical basis and reference for the implementation plan and fine construction of the cast blasting project, we study the problems of casting velocity and energy consumption ratio of broken rock under the impact load of explosions in this manuscript. The calculation methods of casting velocity and throwing energy of broken rock under two blasting modes of spherical charge and cylindrical charge are established by using the theory of dimensional analysis and rock breaking by blasting. A large number of model tests are carried out by using high-speed photography. The results indicate that the casting velocity of broken rock after explosive initiation has two evident stages: instantaneous acceleration to a certain value and subsequent fluctuation; the velocity presents an ordinary distribution law with the step height, and the fitting correlation of high-speed photography results is more than 91%. With the minimum burden increasing from 0.12 m to 0.2 m, the energy consumption decreases from 1306.88 J to 747.49 J and the proportion of energy consumption decreases from 14.77% to 8.45%.https://www.mdpi.com/2076-3417/12/13/6524casting velocityenergy consumption ratiominimum burdenhigh-speed photographyrock-like materials model test |
| spellingShingle | Yonghui Huang Zixiang Zhao Zhiyu Zhang Jiguo Zhou Hongchao Li Yanlin Li Calculation Method of the Blasting Throwing Energy and Its Variation Affected by the Burden Applied Sciences casting velocity energy consumption ratio minimum burden high-speed photography rock-like materials model test |
| title | Calculation Method of the Blasting Throwing Energy and Its Variation Affected by the Burden |
| title_full | Calculation Method of the Blasting Throwing Energy and Its Variation Affected by the Burden |
| title_fullStr | Calculation Method of the Blasting Throwing Energy and Its Variation Affected by the Burden |
| title_full_unstemmed | Calculation Method of the Blasting Throwing Energy and Its Variation Affected by the Burden |
| title_short | Calculation Method of the Blasting Throwing Energy and Its Variation Affected by the Burden |
| title_sort | calculation method of the blasting throwing energy and its variation affected by the burden |
| topic | casting velocity energy consumption ratio minimum burden high-speed photography rock-like materials model test |
| url | https://www.mdpi.com/2076-3417/12/13/6524 |
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