Blasting Impact Simulation Test and Fragmentation Distribution Characteristics in an Open-Pit Mine
Based on the split Hopkinson pressure bar (SHPB) test system, dynamic impact tests of coal specimens under different impact pressures were carried out to study the relationship between the impact load and the size of crushed lump coal. Based on the theory of stress wave attenuation, the relationship...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2019/4080274 |
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| author | Xiaohua Ding Xiang Lu Wei Zhou Xuyang Shi Boyu Luan Ming Li |
| author_facet | Xiaohua Ding Xiang Lu Wei Zhou Xuyang Shi Boyu Luan Ming Li |
| author_sort | Xiaohua Ding |
| collection | DOAJ |
| description | Based on the split Hopkinson pressure bar (SHPB) test system, dynamic impact tests of coal specimens under different impact pressures were carried out to study the relationship between the impact load and the size of crushed lump coal. Based on the theory of stress wave attenuation, the relationship between the blasting impact load in a single-hole blasting area of a coal seam and the load applied in an impact failure test of a coal specimen in the laboratory was established. According to the characteristics of the fragmentation distribution of the coal specimens destroyed under a laboratory impact load and the requirement of the minimum cost control of coal blasting in an open-pit coal mine, the fragmentation size range was divided into three groups: large-diameter, medium-diameter, and powder particles. Based on this range, the variation rule of the mass percentage of coal fragments with impact pressure was obtained. Established on the evaluation principle of the blasting effect in an open-pit coal mine, a good impact fragmentation effect was obtained. The good pressure range is 0.30 MPa≤P<0.90 MPa. |
| format | Article |
| id | doaj-art-dc247bfbf95041b5b65718214b3e2230 |
| institution | DOAJ |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-dc247bfbf95041b5b65718214b3e22302025-08-20T03:23:56ZengWileyShock and Vibration1070-96221875-92032019-01-01201910.1155/2019/40802744080274Blasting Impact Simulation Test and Fragmentation Distribution Characteristics in an Open-Pit MineXiaohua Ding0Xiang Lu1Wei Zhou2Xuyang Shi3Boyu Luan4Ming Li5School of Mines, China University of Mining & Technology, Xuzhou, Jiangsu 221116, ChinaSchool of Mines, China University of Mining & Technology, Xuzhou, Jiangsu 221116, ChinaSchool of Mines, China University of Mining & Technology, Xuzhou, Jiangsu 221116, ChinaSchool of Mines, China University of Mining & Technology, Xuzhou, Jiangsu 221116, ChinaSchool of Mines, China University of Mining & Technology, Xuzhou, Jiangsu 221116, ChinaState Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining & Technology, Xuzhou, Jiangsu 221116, ChinaBased on the split Hopkinson pressure bar (SHPB) test system, dynamic impact tests of coal specimens under different impact pressures were carried out to study the relationship between the impact load and the size of crushed lump coal. Based on the theory of stress wave attenuation, the relationship between the blasting impact load in a single-hole blasting area of a coal seam and the load applied in an impact failure test of a coal specimen in the laboratory was established. According to the characteristics of the fragmentation distribution of the coal specimens destroyed under a laboratory impact load and the requirement of the minimum cost control of coal blasting in an open-pit coal mine, the fragmentation size range was divided into three groups: large-diameter, medium-diameter, and powder particles. Based on this range, the variation rule of the mass percentage of coal fragments with impact pressure was obtained. Established on the evaluation principle of the blasting effect in an open-pit coal mine, a good impact fragmentation effect was obtained. The good pressure range is 0.30 MPa≤P<0.90 MPa.http://dx.doi.org/10.1155/2019/4080274 |
| spellingShingle | Xiaohua Ding Xiang Lu Wei Zhou Xuyang Shi Boyu Luan Ming Li Blasting Impact Simulation Test and Fragmentation Distribution Characteristics in an Open-Pit Mine Shock and Vibration |
| title | Blasting Impact Simulation Test and Fragmentation Distribution Characteristics in an Open-Pit Mine |
| title_full | Blasting Impact Simulation Test and Fragmentation Distribution Characteristics in an Open-Pit Mine |
| title_fullStr | Blasting Impact Simulation Test and Fragmentation Distribution Characteristics in an Open-Pit Mine |
| title_full_unstemmed | Blasting Impact Simulation Test and Fragmentation Distribution Characteristics in an Open-Pit Mine |
| title_short | Blasting Impact Simulation Test and Fragmentation Distribution Characteristics in an Open-Pit Mine |
| title_sort | blasting impact simulation test and fragmentation distribution characteristics in an open pit mine |
| url | http://dx.doi.org/10.1155/2019/4080274 |
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