高温状态下岩石动态断裂的试验研究  

EXPERIMENTAL STUDY ON DYNAMIC FRACTURE OF ROCK UNDER CONDITION OF HIGH TEMPERATURE HEATING

作　　者：张宗贤[1] 俞洁[1] 蒋林根 喻勇[1] 

机构地区：[1]北京科技大学资源工程学院,北京100083

出　　处：《有色金属》1999年第1期1-3,共3页Nonferrous Metals

基　　金：冶金部教育司基础理论项目

摘　　要：利用分离式霍普金松压缩试验装置和自制的加热炉，对辉长岩和大理岩短棒圆柱试件进行了（100～300℃）状态下的动态（冲击）断裂试验，同时，为了帮助确定加热条件下岩石失稳断裂时间，还借助于动态云纹方法进行了室温条件下岩石动态断裂失稳时间的判定。上述试验研究表明，两种岩石在冲击加载条件下的断裂韧度均随加载率增加而增加，而断裂韧度随加热温度的变化并不明显。By means of SHPB (Split Hopkison Pressure Bar) and heating furnace designed by the authors, the impact experiment of gabbro SR (Short Rod) and marble SR specimens subjected to 100 ~ 300℃heating was performed. Meanwhile, in order to determine critic time of rock under the condition of high temperature heating, dynamic More testing method was employed. The experimental results indicated that the dynamic fracture toughness of the two types of rock in heating furnace increased with increasing loading rate, but the values of dynamic fracture toughness hardly changed with heating temperature.

关 键 词：岩石 动态断裂 高温效应 断裂韧度 试验研究 

分 类 号：TU45[建筑科学—岩土工程]