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采用直径为100 mm分离式霍普金森压杆(SHPB)装置对绢云母石英片岩和砂岩进行冲击动力学试验,研究了岩石动态破坏过程中能量的种类以及对岩石变形破坏所起的不同作用。从岩石的微观结构和能量的角度分析了岩石的动态破坏过程中,能量吸收能力的差异所导致的岩样不同的破坏形态的问题。试验结果表明,在岩石的冲击破坏过程中,试件吸收的能量只有很少一部分转化为破碎石块的动能,其余绝大部分用于产生岩石的变形及破坏。同时还发现,与绢云母石英片岩相比,砂岩的吸收能量的能力更强,破碎的程度也更高。
The impact kinetics of sericite quartz schist and sandstone were carried out by using a split Hopkinson pressure bar (SHPB) with a diameter of 100 mm. The types of energy during rock dynamic failure and the different effects on rock deformation and failure were studied. From the perspective of microstructure and energy of rock, the different failure modes of rock samples caused by the differences in energy absorption capacity during rock dynamic failure are analyzed. The experimental results show that only a small part of the energy absorbed by the specimen is transformed into the kinetic energy of the rock during the rock failure process, while the rest of the energy is used to produce rock deformation and damage. At the same time, it was also found that sandstone is more capable of absorbing energy and has a higher degree of fragmentation than sericite quartz schist.