矿业科学学报2025，Vol.10Issue(3)：467-476,10.DOI:10.19606/j.cnki.jmst.2025021
水围压环境下煤的冲击破裂特征及能量耗散规律试验研究
Experimental study on impact fracture characteristics and energy dissipation law of coal under water confining pressure
摘要
Abstract
To investigate the actual dynamic fracture process and energy dissipation mechanisms of coal under triaxial loading conditions,a visual experimental study was conducted using a self-developed multi-field coupled Split Hopkinson Pressure Bar(SHPB)testing system.This research systematically examined crack evolution characteristics in coal samples under varying water confining pressure condi-tions.The relationships between dynamic mechanical parameters(impact velocity,strain rate,and wa-ter confining pressure)were quantitatively analyzed,along with the influence of water confining pres-sure on energy absorption,conversion,and release processes during coal failure.The research results show that the dynamic strength of coal shows obvious strain rate effect under water confining pressure environment.There is a good quadratic function relationship between water confining pressure and the dynamic strength of coal mass,and the failure strain of coal samples shows a decreasing trend with the increase of water confining pressure.With the increase of water confining pressure,the fracture mode of coal mass will change from"axial splitting failure"to"compression-shear failure".The greater the impact load,the higher the total energy input to the coal body and the dissipated energy used for dam-age and deformation,and the more serious the deformation of the coal body.With the increase of water confining pressure,the total input energy shows a trend of gradual increase,and more energy is re-quired from the outside when the coal body is damaged.关键词
水围压/霍普金森压杆(SHPB)/煤/断裂特征/冲击载荷/能量耗散Key words
water confining pressure/SHPB/coal/fracture characteristics/impact load/energy dissi-pation分类
矿山工程引用本文复制引用
王凯,冯国瑞,白锦文,张俊亮..水围压环境下煤的冲击破裂特征及能量耗散规律试验研究[J].矿业科学学报,2025,10(3):467-476,10.基金项目
国家自然科学基金(52334005 （）
51925402 （）
52404093) （）
优秀来晋博士科研资助项目(20242093) （20242093）
山西省高等学校科技创新项目(2024L221) （2024L221）
太原科技大学博士科研启动基金(20242008) （20242008）
