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Study on Dynamic Characteristics and Failure Characteristics of Magnetite under Impact Load
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Jun-chao NIU1a, Ji-min LI2, Lin-fang MEI3, Gao-feng REN1a, 1b, Yong-xiang GE1a, 1b, Cong-rui ZHANG1a, 1b, Xi-kui LU4, Liang ZHAO1a, SATIMIN NOER REFKY ADI NATA1a
Blasting | 2025, 42(2) : 52 - 59
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Blasting | 2025, 42(2): 52-59
• THEORETICAL AND TECHNOLOGICAL EXPLORATION •
Study on Dynamic Characteristics and Failure Characteristics of Magnetite under Impact Load
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Jun-chao NIU1a, Ji-min LI2, Lin-fang MEI3, Gao-feng REN1a, 1b, Yong-xiang GE1a, 1b, Cong-rui ZHANG1a, 1b, Xi-kui LU4, Liang ZHAO1a, SATIMIN NOER REFKY ADI NATA1a
Affiliations
  • 1.a.School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
  • 1.b.Key Laboratory of Green Utilization of Key Non-metallic Mineral Resources, Wuhan University of Technology, Wuhan 430070, China
  • 2.Chengchao Mining Company of WlSCO Resources Group, Ezhou 436050, China
  • 3.WISCO Resources Group Corporation Limited, Wuhan 430080, China
  • 4.Jingmen Natural Resources and Planning Bureau, Jingmen 448000, China
Published: 2025-06-01 doi: 10.3963/j.issn.1001-487X.2025.02.006
Outline
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To investigate the energy evolution and failure patterns of magnetite during blasting and to minimize the impact of blasting disturbances on the stability of pillars and surrounding rocks, a series of multi-stage strength impact tests were conducted on magnetite samples using a Split Hopkinson pressure bar (SHPB) apparatus. The dynamic response characteristics of magnetite were analyzed, focusing on parameters such as dynamic peak compressive strength, failure modes, fragmentation size, and energy dissipation density under varying strain rates. The results show that magnetite's dynamic peak compressive strength and energy dissipation density increase exponentially with the increase in strain rate. At the same time, the crushing size decreases exponentially, demonstrating a strong strain-rate dependency. The failure process of magnetite can be divided into three stages: crack compaction, elastic deformation, and crushing. The dynamic increase factor (DIF) also increases with the increase in strain rate. The failure mode of magnetite transitions from splitting failure at lower strain rates to crushing failure at higher strain rates as crack interactions intensify. Therefore, when blasting rock breaking is applied to magnetite mining, it is crucial to balance impact strength and energy dissipation to enhance crushing efficiency while meeting the required fragmentation standards.

magnetite  /  SHPB  /  dynamic peak compressive strength  /  destruction form  /  energy dissipation  /  strain rate effect
Jun-chao NIU, Ji-min LI, Lin-fang MEI, Gao-feng REN, Yong-xiang GE, Cong-rui ZHANG, Xi-kui LU, Liang ZHAO, SATIMIN NOER REFKY ADI NATA. Study on Dynamic Characteristics and Failure Characteristics of Magnetite under Impact Load[J]. Blasting, 2025 , 42 (2) : 52 -59 . DOI: 10.3963/j.issn.1001-487X.2025.02.006
Funding
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  • National Natural Science Foundation of China(52174087)
  • Study on control mechanism of disasters chain-scission and fine development of underground goaf masses in hard gypsum mine
Appendix
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Year 2025 volume 42 Issue 2
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124
61
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Article Info
doi: 10.3963/j.issn.1001-487X.2025.02.006
  • Receive Date：2024-08-15
  • Online Date：2026-03-19
  • Published：2025-06-01
Article Data
Affiliations
History
  • Received：2024-08-15
Funding
National Natural Science Foundation of China(52174087)
Study on control mechanism of disasters chain-scission and fine development of underground goaf masses in hard gypsum mine
Affiliations
    1.a.School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China
    1.b.Key Laboratory of Green Utilization of Key Non-metallic Mineral Resources, Wuhan University of Technology, Wuhan 430070, China
    2.Chengchao Mining Company of WlSCO Resources Group, Ezhou 436050, China
    3.WISCO Resources Group Corporation Limited, Wuhan 430080, China
    4.Jingmen Natural Resources and Planning Bureau, Jingmen 448000, China

Corresponding:

GE Yong-xiang (1995-), male, born in Zhangye city, Gansu province, Ph. D, research associate, mainly engaged in research on rock mechanics and rock dynamics of mining rock mass, (E-mail) .
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https://castjournals.cast.org.cn/joweb/bp/EN/10.3963/j.issn.1001-487X.2025.02.006
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Citations
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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