Dynamic Damage Evolution and Damage Model Characteristics of Magnetite Quartzite Under the Effect of Water-Pressure-Stress Wave
SUN Haikuan1,2,3,4, GAN Deqing1,2,3,4,*, LIU Zhiyi1,2,3,4, XUE Zhenlin1,2,3,4
1 School of Mining Engineering, North China University of Science and Technology, Tangshan 063210, Hebei, China 2 Collaborative Innovation Center of Green Development and Ecological Restoration of Mineral Resources, North China University of Science and Technology, Tangshan 063210, Hebei, China 3 Hebei Province Key Laboratory of Mining Development and Security Technology, North China University of Science and Technology, Tangshan 063210, Hebei, China 4 Mine Green Intelligent Mining Technology Innovation Center of Hebei Province, North China University of Science and Technology, Tangshan 063210, Hebei, China
Abstract: The magnetite quartzite in deep ground with mine water inrush environment is damaged by the coupling effect of water immersion and water pressure, which leads to the change of mechanical properties. In order to explore the dynamic damage evolution characteristics of magnetite quartzite under the effect of water-pressure-stress wave, the magnetite quartzite treated by vacuum saturation was tested by dynamic impact test through the split Hopkinson pressure bar (SHPB) test system. The results show that under the effect of water-pressure-stress wave, vacuum saturation has a certain weakening effect on magnetite quartzite, and the dynamic peak strength of magnetite quartzite decreases first and then increases with the increase of water immersion pressure, showing an overall decreasing trend. The failure degree of magnetite quartzite is aggravated by vacuum saturation, and the particle size of fracture is reduced, but the stress wave is the main factor leading to the fracture degree of magnetite quartzite. With the increase of immersion pressure, the initiation time of cracks in magnetite quartzite decreases and the number of cracks increases. The failure mode gradually changes from intergranular failure to transgranular failure and powder failure, and the proportion of absorbed energy and incident energy of the sample approximately increases first and then decreases. A constitutive model for dynamic damage of magnetite quartzite under water-pressure-stress waves was established and verified by comparing the theoretical stress-strain curve with the test stress-strain curve, showing that the model has high applicability.
孙海宽, 甘德清, 刘志义, 薛振林. 水-压-应力波作用下磁铁石英岩动态损伤演化与损伤模型[J]. 材料导报, 2025, 39(24): 24050143-8.
SUN Haikuan, GAN Deqing, LIU Zhiyi, XUE Zhenlin. Dynamic Damage Evolution and Damage Model Characteristics of Magnetite Quartzite Under the Effect of Water-Pressure-Stress Wave. Materials Reports, 2025, 39(24): 24050143-8.
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2025, Vol. 39 
