绢云母石英片岩和砂岩动态破坏过程的能量分析  

Analysis on Energy of Sericite-Quartz Schist and Sandstone in the Dynamic Fracture Process

作　　者：刘石[1] 许金余[1,2] 刘军忠[1] 吕晓聪[3] 支乐鹏[1] 

机构地区：[1]空军工程大学机场建筑工程系,西安710038 [2]西北工业大学力学与土木建筑学院,西安710072 [3]北京军区空军后勤部机营处,北京100005

出　　处：《地下空间与工程学报》2011年第6期1181-1185,共5页Chinese Journal of Underground Space and Engineering

基　　金：国家自然科学基金资助项目(51078350)

摘　　要：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。Impact experiments on sericite-quartz schist and sandstone are carried out with the split Hopkinson pressure bar（SHPB） apparatus of 100mm in diameter.The types and different effects of the diversified energy on rock fracture in the process of deformation and fracture are analyzed with energy methods.The problem of different fracture forms of sericite-quartz schist and sandstone is studied from the point of microscopic view and energy absorbency.The experimental results show that the kinetic energy of crushed rock samples accounts for only a small part of the absorbed energy while the vast majority of the energy is used to generate the deformation and fracture of rock.The sandstone takes on more obvious energy absorbency and has much small fragment particle size.

关 键 词：绢云母石英片岩 砂岩 能量 破坏 破碎块度 

分 类 号：TU452[建筑科学—岩土工程]