爆炸与冲击2023，Vol.43Issue(12)：12-24,13.DOI:10.11883/bzycj-2023-0022
夹层材料对软硬介质组合岩体动态力学特性的影响
Effect of interlayer material on dynamic mechanical properties of rock mass with combined hard and soft media
摘要
Abstract
A split Hopkinson pressure bar(SHPB)device was used to study the dynamic mechanical properties and deformation and failure characteristics of the rock mass combined with different sandwich materials,using sandstone and granite as the soft and hard rock matrix.The discrete lattice spring method(DLSM)was used to further investigate the crack propagation,the reaction and transmission at the interlayer interface and the energy distribution characteristics of rock mass combined with different interlayer materials.The results show that the growth factor of rock mass dynamic strength increases with the increase of rock mass dynamic compressive strength,showing an obvious dynamic compressive strength dependence.The rock mass combined with different interlayer materials has a obvious nonlinear section in the initial loading stage,and the closed pores and cracks in the sandstone of non-interlayer rock have the longest nonlinear section in the initial stress stage.With the increase of the strength of interlayer material,the obstacle ability of interlayer to crack propagation and development of rock mass gradually becomes weak,and the energy consumption of rock mass crack and failure is gradually reduced.The failure of the intercalated rock mass starts at the cementation surface of the intercalated rock mass.With the increase of the strength of the intercalated material,the failure of the soft rock near the cementation surface is gradually intensified,while the hard rock has no obvious failure.The rock mass with interlayer has a good clipping effect.With the decrease of the strength of interlayer material,the peak stress value of both ends gradually increases and decreases,whilst the energy absorption density of the interlayer rock mass increases in a short time,and the stability becomes worse,so it is easy to be destroyed.关键词
夹层材料岩体/裂纹扩展/SHPB/离散格子弹簧法Key words
intercalated rock mass/crack propagation/SHPB/discrete lattice spring method分类
数理科学引用本文复制引用
王雁冰,宋佳辉,任斌,刘珍,龙永东..夹层材料对软硬介质组合岩体动态力学特性的影响[J].爆炸与冲击,2023,43(12):12-24,13.基金项目
国家重点研发计划(2021YFC2902103) （2021YFC2902103）
国家自然科学基金(51934001) （51934001）
中央高校基本科研业务费专项资金(2023JCCXLJ02) （2023JCCXLJ02）
