摘要
深部岩石在地下高地应力环境的动态力学性能对深部矿山工程的开展有重要影响,因此,其动态力学性能研究具有重要意义。本文以平顶山某煤矿下白砂岩为研究对象,利用三维霍普金森杆装置开展动态力学试验并采用HJC本构模型的白砂岩进行三维霍普金森杆有限元仿真,研究静水压对白砂岩动态力学性能、能量吸收和损伤的影响。结果表明:白砂岩的峰值应力随着静水压的增加而增加,峰值应变随着静水压的增加而降低;静水压可抑制裂纹的扩展,增强白砂岩的强度;HJC本构模型可以较好地模拟白砂岩的损伤失效。预期结果可为深部岩石动态力学性能的研究提供参考,并为深部岩石工程的实施提供理论基础。
The dynamic mechanical properties of deep rock in high underground stress environment have an important influence on the development of deep mine engineering.Therefore,it is of great significance to study its dynamic mechanics.The effects of hydrostatic pressure on the dynamic mechanical properties,energy absorption and damage of white sandstone from a coal mine in Pingdingshan were investigated,using 3D Hopkinson bar experiments and finite element simulations based on the Holmquist-Johnson-Cook(HJC)constitutive model.The results show that as the hydrostatic pressure increases,the peak stress of white sandstone increases.Conversely,the peak strain decreases with the increase of hydrostatic pressure.Furthermore,the hydrostatic pressure can restrain the crack propagation and enhance the strength of white sandstone.Additionally,it was found that the HJC constitutive model can simulate the damage failure of white sandstone well.These expected results provide a valuable reference for the study of dynamic mechanical properties of deep rock and a theoretical basis for the implementation of deep rock engineering.
作者
吕绍品
郑光
郑宇轩
聂宏
周风华
LYU Shaopin;ZHENG Guang;ZHENG Yuxuan;NIE Hong;ZHOU Fenghua(Key Laboratory of Impact and Safety Engineering,Ministry of Education,Ningbo University,Ningbo 315211,China;State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)
出处
《硅酸盐通报》
CAS
北大核心
2024年第2期543-554,共12页
Bulletin of the Chinese Ceramic Society
基金
机械结构力学及控制国家重点实验室开放课题(MCMS-E-0221Y01)。
关键词
三维霍普金森杆
白砂岩
静水压
有限元仿真
HJC本构模型
动态力学性能
3D Hopkinson bar
white sandstone
hydrostatic pressure
finite element simulation
HJC constitutive model
dynamic mechanical property
