Numerical simulation on the influence of boreholes arrangement and delay time on coal crushing effects
According to the effect of different charging and boreholes arrangements and delay time on coal crushing effect in coal blasting,this paper used ANSYS-LS/DYNA to carry out numerical simulation and analyzed the calculation results.The results show that the explosion stress wave has an supper position...
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| Format: | Article |
| Language: | English |
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Emergency Management Press
2019-08-01
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| Series: | 矿业科学学报 |
| Subjects: | |
| Online Access: | http://kykxxb.cumtb.edu.cn/article/id/229 |
| _version_ | 1811308091769094144 |
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| author | Liu Fei Chang Kunlin Li Meng |
| author_facet | Liu Fei Chang Kunlin Li Meng |
| author_sort | Liu Fei |
| collection | DOAJ |
| description | According to the effect of different charging and boreholes arrangements and delay time on coal crushing effect in coal blasting,this paper used ANSYS-LS/DYNA to carry out numerical simulation and analyzed the calculation results.The results show that the explosion stress wave has an supper position effect in the coal,and the coal is mainly broken by tensile.With the increase of ratios of borehole distance and row distance,the crushing of the coal increased first and then decreased.When the ratio of borehole distance and row distance is 1.5,the peak stress in the center of the triangular of boreholes and the degree of coal fragmentation reached the maximum,which are about 175 MPa and 9.6%,respectively.The cracks around the empty hole were annularly distributed.When <i>a</i>/<i>b</i> were 1.0 or 1.5,the cracks were mainly concentrated inside the triangle.When the delay time between boreholes is 0.5 ms,the cracks dispersion is larger than that of 1.0 ms.The number of cracks increases with the increase of delay time between rows. |
| first_indexed | 2024-04-13T09:17:01Z |
| format | Article |
| id | doaj.art-c0a10507d688455987c85e82b486b779 |
| institution | Directory Open Access Journal |
| issn | 2096-2193 |
| language | English |
| last_indexed | 2024-04-13T09:17:01Z |
| publishDate | 2019-08-01 |
| publisher | Emergency Management Press |
| record_format | Article |
| series | 矿业科学学报 |
| spelling | doaj.art-c0a10507d688455987c85e82b486b7792022-12-22T02:52:43ZengEmergency Management Press矿业科学学报2096-21932019-08-014431832610.19606/j.cnki.jmst.2019.04.00520190405Numerical simulation on the influence of boreholes arrangement and delay time on coal crushing effectsLiu Fei0Chang Kunlin1Li Meng2College of Resources and Safety Engineering, China University of Mining and Technology, Beijing 100083, ChinaCollege of Resources and Safety Engineering, China University of Mining and Technology, Beijing 100083, ChinaCollege of Resources and Safety Engineering, China University of Mining and Technology, Beijing 100083, ChinaAccording to the effect of different charging and boreholes arrangements and delay time on coal crushing effect in coal blasting,this paper used ANSYS-LS/DYNA to carry out numerical simulation and analyzed the calculation results.The results show that the explosion stress wave has an supper position effect in the coal,and the coal is mainly broken by tensile.With the increase of ratios of borehole distance and row distance,the crushing of the coal increased first and then decreased.When the ratio of borehole distance and row distance is 1.5,the peak stress in the center of the triangular of boreholes and the degree of coal fragmentation reached the maximum,which are about 175 MPa and 9.6%,respectively.The cracks around the empty hole were annularly distributed.When <i>a</i>/<i>b</i> were 1.0 or 1.5,the cracks were mainly concentrated inside the triangle.When the delay time between boreholes is 0.5 ms,the cracks dispersion is larger than that of 1.0 ms.The number of cracks increases with the increase of delay time between rows.http://kykxxb.cumtb.edu.cn/article/id/229boreholes arrangementratio of borehole distance and row distancedelay timecrushing degree |
| spellingShingle | Liu Fei Chang Kunlin Li Meng Numerical simulation on the influence of boreholes arrangement and delay time on coal crushing effects 矿业科学学报 boreholes arrangement ratio of borehole distance and row distance delay time crushing degree |
| title | Numerical simulation on the influence of boreholes arrangement and delay time on coal crushing effects |
| title_full | Numerical simulation on the influence of boreholes arrangement and delay time on coal crushing effects |
| title_fullStr | Numerical simulation on the influence of boreholes arrangement and delay time on coal crushing effects |
| title_full_unstemmed | Numerical simulation on the influence of boreholes arrangement and delay time on coal crushing effects |
| title_short | Numerical simulation on the influence of boreholes arrangement and delay time on coal crushing effects |
| title_sort | numerical simulation on the influence of boreholes arrangement and delay time on coal crushing effects |
| topic | boreholes arrangement ratio of borehole distance and row distance delay time crushing degree |
| url | http://kykxxb.cumtb.edu.cn/article/id/229 |
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