三轴SHPB冲击作用下岩石破坏机理的研究  

THE DYNAMIC FRACTURE MECHANISM OF ROCKS UNDER SHPB CONFINING PRESSURE

作　　者：王林[1] 于亚伦[1] 

机构地区：[1]北京科技大学采矿系,北京100083

出　　处：《爆炸与冲击》1993年第1期84-89,共6页Explosion and Shock Waves

摘　　要：本文应用三轴SHPB高速冲击试验机对岩石试体进行三向应力状态(对试件施加围压σ_2=σ_3和冲击应力σ_1)下的冲击试验,分析研究岩石的破坏机理。由试验结果对三轴状态下岩石的破坏类型进行分类,分析其内部受力状况;得出岩石动态破坏强度,画出动态三轴、动态单轴和静态单轴的破坏强度比较曲线。通过对破坏类型的分析,以最大剪应力条件建立岩石的破坏判据,建立三轴动态破坏强度、单轴动态破坏强度与围压的关系式。This article investigates the dynamic fracture of rocks in triaxial position. Triaxial SHPB apparatus was applied in the experiment. From results of the experiment, fracture types of rocks was classified. The inside pressures of specimens were analysed. The dynamic fracture strength was calculated, and the fracture strength graphics in dynamic triaxial, dynamic single-axle and static single-axle position were drawn using the results of fracture types, based up on the maximum shear stress condition the fracture judgement of rocks and relationship of dynamic fracture strength of triaxial, single-axle state and confining pressure were established.

关 键 词：三向应力 动态破坏强度 破坏 岩石 

分 类 号：TU452[建筑科学—岩土工程]