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Influence of Pre-split Fracture Width on Blasting Effect
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Yuanjuan ZHANG1, Fenghuang WANG2, Xingrong WANG2
Mining and Metallurgical Engineering | 2024, 44(2) : 31 - 33
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Mining and Metallurgical Engineering | 2024, 44(2): 31-33
• MINING •
Influence of Pre-split Fracture Width on Blasting Effect
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Yuanjuan ZHANG1, Fenghuang WANG2, Xingrong WANG2
Affiliations
  • 1.School of Resource and Safety Engineering, Henan University of Engineering, Zhengzhou 451191, Henan, China
  • 2.Hubei Yihua Group Co Ltd, Yichang 443000, Hubei, China
Published: 2024-04-01 doi: 10.3969/j.issn.0253-6099.2024.02.008
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A numerical model was established by using LS-DYNA software and then used to simulate the influence of pre-split fracture with width of 3 cm and 5 cm, respectively, on blasting effect. It is found that wider pre-split fracture can bring a better effect of blasting vibration attenuation, with the maximum amplitude decay rate of 46%. Based on pre-split blasting tests with different borehole sizes, the on-site vibration monitoring results have verified the correctness of the rule. It is concluded that the parameters of pre-split blasting should be selected based on the actual working conditions in consideration of protection of surrounding buildings.

pre-split fracture  /  peak vibration velocity  /  LS-DYNA  /  numerical simulation  /  blasting
Yuanjuan ZHANG, Fenghuang WANG, Xingrong WANG. Influence of Pre-split Fracture Width on Blasting Effect[J]. Mining and Metallurgical Engineering, 2024 , 44 (2) : 31 -33 . DOI: 10.3969/j.issn.0253-6099.2024.02.008
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Year 2024 volume 44 Issue 2
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Article Info
doi: 10.3969/j.issn.0253-6099.2024.02.008
  • Receive Date：2023-10-13
  • Online Date：2026-03-19
  • Published：2024-04-01
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  • Received：2023-10-13
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Affiliations
    1.School of Resource and Safety Engineering, Henan University of Engineering, Zhengzhou 451191, Henan, China
    2.Hubei Yihua Group Co Ltd, Yichang 443000, Hubei, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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