郭连军;杨跃辉;华悦含;李林;
GUO Lian-jun;YANG Yue-hui;HUA Yue-han;LI Lin;School of Civil Engineering,University of Science and Technology LiaoNing;School of Mining Engineering,University of Science and Technology LiaoNing;

• 1:辽宁科技大学土木工程学院
• 2:辽宁科技大学矿业工程学院

摘要(Abstract)：

利用SHPB试验设备,研究花岗岩在不同冲击气体压力下的压缩力学性能,讨论岩石类材料的应力-应变特性和破坏过程。结果表明,花岗岩的平均应变率与冲击气体压力有明显相关性,在不同冲击压力下,应变率时间历程曲线明显不同;岩石的应力-应变曲线可分成初始压密、稳定变形、非线性弹性与破坏4个阶段,且冲击气压存在一个使岩石破碎效果明显的合理值;其破坏形式大多以沿轴向的劈裂破坏为主,但在较高的冲击气压作用下,岩石则呈压碎破坏形式。
The dynamic compression mechanical properties of granites under different gas pressures were investigated using Split Hopkinson Pressure Bar(SHPB),and the stress-strain characteristics and failure process of the rock material were discussed.The testing results showed that there had an obvious fitting relationship between the average strain rate and the impact pressure,and the time-history curves of strain showed significantly difference under various impact pressures;the rock stress-strain curve could be divided into four stages,and the impact pressure had a reasonable value that demonstrated impact on the broken rock;the damage forms of fracturing presented an axial cleaving mode as the major and crushing mode under the high impact pressure.

关键词(KeyWords)： 岩石破碎;SHPB试验;应变率
Fragmentation of rocks;SHPB experiment;Strain rate

Abstract:

Keywords:

基金项目(Foundation): 辽宁省高等学校优秀人才支持计划资助项目(LR2011006)

作者(Authors): 郭连军;杨跃辉;华悦含;李林;
GUO Lian-jun;YANG Yue-hui;HUA Yue-han;LI Lin;School of Civil Engineering,University of Science and Technology LiaoNing;School of Mining Engineering,University of Science and Technology LiaoNing;

参考文献(References)：

• [1]戴俊.岩石动力学特性与爆破理论[M].北京:冶金工业出版社,2002.
• [2]平琦,马芹永,张经双,等.高应变率下砂岩动态拉伸性能SHPB试验与分析[J].岩石力学与工程学报,2012,31(S1):3363-3369.
• [3]支乐鹏,许金余,刘军忠,等.基于SHPB试验下两种岩石的动态力学性能研究[J].四川建筑科学研究,2012,38(4):111-114.
• [4]杜晶.不同长径比下岩石冲击动力学特性研究[D].长沙:中南大学,2011.
• [5]吕晓聪,许金余,张龙,等.大直径SHPB系统角闪岩的冲击动力试验[J].兵工学报,2010,31(S1):227-333.