深部岩石动力学SHPB实验研究进展

Advances on dynamic behaviors of deep rocks using SHPB

深地岩石工程中,岩石处在高地应力、高温、高孔隙压力赋存状态以及动态扰动作用下,其稳定性被显著劣化,严重危害工程安全。近年来,研究人员在考虑原位应力和孔隙压力(差)的深部岩石动力实验方面取得了很大进展,因此有必要系统地回顾和总结这一领域的新进展。介绍了分离式霍普金森压杆(SHPB)的发展简史以及深部岩石动态实验的概况,包括实验装置、方法和结果的新进展。全面介绍了三轴围压SHPB系统与流固耦合SHPB系统的原理,以及相关的前沿应用和实验结果,包括多种应力状态和流固耦合条件下岩石动态强度和断裂韧度的实验方法和结果,总结了不同原位条件下深部岩石的动态破断机理与特征,相应成果为深部岩石工程的发展提供了重要的理论基础。

In deep rock engineering,the stability of rocks is significantly threatened due to the coupled effects of high in-situ stress,high temperature,high pore pressure,and dynamic disturbances on the deep rocks.In past few decades,researchers have made significant progress in dynamic experiments for deep rocks with in-situ stress and pore pressure conditions.Therefore,systematical review and summary about advances on dynamic test and response of deep rocks are necessary.A brief history of the split Hopkinson pressure bar(SHPB)and an overview of dynamic experiments on deep rocks are introduced,including the advances in experimental equipment,methods,and results.In addition,the principles of the hydraulic-mechanical coupling and triaxial confinement SHPB systems are comprehensively described.Relevant cutting-edge applications and experimental results are also introduced.The testing methods and results of dynamic strength and fracture behaviors of rocks under multiple stress states and coupled hydraulic-mechanical conditions are systematically discussed.Finally,the dynamic failure mechanisms and characteristics of deep rocks under different in-situ conditions are summarized.The achievements mentioned above provide important theoretical basis for the development of deep rock engineering.