Numerical Simulation of Parallel Cutting with Different Number of Empty Holes
The cutting blasting plays a key role in rock excavation construction, which determines the blasting effect and efficiency of the entire blasting project. In the cutting blasting, parallel holes are often used as the auxiliary free surface and the compensation space of blasting rock, and the empty h...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek
2021-01-01
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| Series: | Tehnički Vjesnik |
| Subjects: | |
| Online Access: | https://hrcak.srce.hr/file/380251 |
| _version_ | 1797206931381682176 |
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| author | Xiantang Zhang* Juan Li Dan Li Shizhen Xie Hongmin Zhou Tingchun Li |
| author_facet | Xiantang Zhang* Juan Li Dan Li Shizhen Xie Hongmin Zhou Tingchun Li |
| author_sort | Xiantang Zhang* |
| collection | DOAJ |
| description | The cutting blasting plays a key role in rock excavation construction, which determines the blasting effect and efficiency of the entire blasting project. In the cutting blasting, parallel holes are often used as the auxiliary free surface and the compensation space of blasting rock, and the empty holes have a great influence on the blasting effect. In this paper, Ansys/Ls-Dyna finite element analysis software is carried out to simulate four models with different number of empty holes. The simulation results show that the stronger the guiding effect of the empty holes on the crack propagation, the more obvious the inhibition effect on the crack in the remaining direction. The initial crack near the empty hole is generated by the continuous action of the stress wave, and the empty hole promotes the propagation of the explosion stress wave. The inconsistent guiding directions of adjacent empty holes are one of the reasons for the unsatisfactory blasting effect of multiple small diameter empty holes. The closer the empty hole is to the blasthole, the larger the maximum principal stress. By comparing the results of calculation with the numerical simulation, it is verified that the maximum principal stress near the empty hole is similar and the change rule is consistent. The above research has reference meaning to the location of the hollow hole in the actual blasting construction and the density of the empty hole. |
| first_indexed | 2024-04-24T09:14:51Z |
| format | Article |
| id | doaj.art-6d14e69ed6624cf79494b7cafc76a414 |
| institution | Directory Open Access Journal |
| issn | 1330-3651 1848-6339 |
| language | English |
| last_indexed | 2024-04-24T09:14:51Z |
| publishDate | 2021-01-01 |
| publisher | Faculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in Osijek |
| record_format | Article |
| series | Tehnički Vjesnik |
| spelling | doaj.art-6d14e69ed6624cf79494b7cafc76a4142024-04-15T17:10:26ZengFaculty of Mechanical Engineering in Slavonski Brod, Faculty of Electrical Engineering in Osijek, Faculty of Civil Engineering in OsijekTehnički Vjesnik1330-36511848-63392021-01-012851742174810.17559/TV-20201211121650Numerical Simulation of Parallel Cutting with Different Number of Empty HolesXiantang Zhang*0Juan Li1Dan Li2Shizhen Xie3Hongmin Zhou4Tingchun Li5Shandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, College of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao 266590, ChinaShandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, College of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao 266590, ChinaCollege of Earth Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, ChinaLinyi Urban Construction Investment Group Co. Ltd, Linyi 276100, ChinaShandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, College of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao 266590, ChinaShandong Provincial Key Laboratory of Civil Engineering Disaster Prevention and Mitigation, College of Civil Engineering and Architecture, Shandong University of Science and Technology, Qingdao 266590, ChinaThe cutting blasting plays a key role in rock excavation construction, which determines the blasting effect and efficiency of the entire blasting project. In the cutting blasting, parallel holes are often used as the auxiliary free surface and the compensation space of blasting rock, and the empty holes have a great influence on the blasting effect. In this paper, Ansys/Ls-Dyna finite element analysis software is carried out to simulate four models with different number of empty holes. The simulation results show that the stronger the guiding effect of the empty holes on the crack propagation, the more obvious the inhibition effect on the crack in the remaining direction. The initial crack near the empty hole is generated by the continuous action of the stress wave, and the empty hole promotes the propagation of the explosion stress wave. The inconsistent guiding directions of adjacent empty holes are one of the reasons for the unsatisfactory blasting effect of multiple small diameter empty holes. The closer the empty hole is to the blasthole, the larger the maximum principal stress. By comparing the results of calculation with the numerical simulation, it is verified that the maximum principal stress near the empty hole is similar and the change rule is consistent. The above research has reference meaning to the location of the hollow hole in the actual blasting construction and the density of the empty hole.https://hrcak.srce.hr/file/380251action mechanism of empty holenumerical simulationparallel cutrock fragmentation processstress concentration |
| spellingShingle | Xiantang Zhang* Juan Li Dan Li Shizhen Xie Hongmin Zhou Tingchun Li Numerical Simulation of Parallel Cutting with Different Number of Empty Holes Tehnički Vjesnik action mechanism of empty hole numerical simulation parallel cut rock fragmentation process stress concentration |
| title | Numerical Simulation of Parallel Cutting with Different Number of Empty Holes |
| title_full | Numerical Simulation of Parallel Cutting with Different Number of Empty Holes |
| title_fullStr | Numerical Simulation of Parallel Cutting with Different Number of Empty Holes |
| title_full_unstemmed | Numerical Simulation of Parallel Cutting with Different Number of Empty Holes |
| title_short | Numerical Simulation of Parallel Cutting with Different Number of Empty Holes |
| title_sort | numerical simulation of parallel cutting with different number of empty holes |
| topic | action mechanism of empty hole numerical simulation parallel cut rock fragmentation process stress concentration |
| url | https://hrcak.srce.hr/file/380251 |
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