张慧;邢闯锋;张力民;刘红岩;
ZHANG Hui;XING Chuang-feng;ZHANG Li-min;LIU Hong-yan;Architecture Engineering College,Huanghuai University;Engineering Survey & Design Company of China Railway Seventh Group Co.,Ltd.;School of Civil and Resource Engineering ,University of Science and Technology Beijing;Hebei Chengde Iron and Steel Corporation;College of Engineering & Technology,China University of Geosciences(Beijing);

• 1:黄淮学院建筑工程学院
• 2:中铁七局集团有限公司勘测设计院
• 3:北京科技大学土木与资源工程学院
• 4:河北承德钢铁公司

摘要(Abstract)：

为研究裂隙对岩体冲击韧性及破坏模式的影响规律,以及裂隙岩体在高应变率下的动态破坏特征,采用摆锤式冲击实验机对裂隙及完整岩体进行了不同冲击速度、不同裂隙条件下的冲击实验。实验结果表明,对长度相同的完整试件而言,试件直径越大,即试件体积越大,试件破碎就越充分,断面也越不规整;试件中的裂隙长度越长,试件破坏时的吸收功就越小,冲击韧性也越小,试件吸收功和冲击韧性随裂隙长度的增加而减小;试件裂隙角度越大,试件破坏断面就越不规整,试件破坏后的块度也越不均匀,试件吸收功和冲击韧性随裂隙倾角的增大而减小。
In order to study the effect law of the crack on rock mass impact toughness and failure mode and its dynamic failure characteristic under high strain rates,a series of impact tests were conducted on crack and intact rockmass with different impact velocity and crack condition by pendulum-type impact test machine.The test results showed that,to the intact sample with the same length,the fragmentation of the sample was more full and the cross section was more irregular if the sample′s diameter was larger.When the crack in the sample was longer,the absorbed energy and impact toughness were less.The absorbed energy and impact toughness decreased with the increase of crack length.When the dip angle of the crack was larger,the failure area of the sample was more irregular and the block size was more uneven.The absorbed energy and impact toughness decreased with the crack dip angle increasing.

关键词(KeyWords)： 裂隙岩体;冲击韧性;破坏模式;吸收功;冲击速度
Cracked rock mass;Impact toughness;Failure mode;Absorbed energy;Impact velocity

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(41002113/41162009);; 中央高校基本科研业务费专项资金资助(2652014019,2652015263)

作者(Authors): 张慧;邢闯锋;张力民;刘红岩;
ZHANG Hui;XING Chuang-feng;ZHANG Li-min;LIU Hong-yan;Architecture Engineering College,Huanghuai University;Engineering Survey & Design Company of China Railway Seventh Group Co.,Ltd.;School of Civil and Resource Engineering ,University of Science and Technology Beijing;Hebei Chengde Iron and Steel Corporation;College of Engineering & Technology,China University of Geosciences(Beijing);

参考文献(References)：

• [1]刘思妤,徐则民.基于动-静应力耦合的深埋隧道岩爆灾害控制[J].自然灾害学报,2010,19(1):177-184.LIU Si-yu,XU Ze-min.Rock burst control of deeply buried tunnels based on coupling of dynamic and static stresses[J].Journal of Natural Disasters,2010,19(1):177-184.
• [2]QI C Z,WANG M Y,QIAN Q H.Strain-rate effects on the strength and fragmentation size of rocks[J].International Journal of Impact Engineering,2009,36(12):1355-1364.
• [3]OLSSON W A.The compressive strength of tuff as a function of strain rate from 10-6 to 103 sec.[J].Int.J.Rock Mech.Min.Sci.,1991,28(1):115-118.
• [4]葛科,刘恩龙,赵玲.冲击载荷作用下岩石动力特性的试验研究[J].工程勘察,2010,38(5):11-15.GE Ke,LIU En-long,ZHAO Ling.Experimental study on the dynamic properties of rock subjected to impact loading[J].Geotechnical Investigation&Surveying,2010,38(5):11-15.
• [5]夏开文,姚伟.预加载下岩石的动态力学性能研究[J].工程爆破,2015,21(6):7-13.XIA Kai-wen,YAO Wei.Dynamic mechanical properties of rock under pre-load[J].Engineering Blasting,2015,21(6):7-13.
• [6]黄理兴,陈奕柏.我国岩石动力学研究状况与发展[J].岩石力学与工程学报,2003,22(11):1881-1886.HUANG Li-xing,CHEN Yi-bai.Rock dynamics in China:past,present and future[J].Chinese Journal of Rock Mechanics and Engineering,2003,22(11):1881-1886.
• [7]于永江,王来贵,赵娜.冲量及层理对煤块冲击韧度的影响[J].辽宁工程技术大学学报,2006,25(6):842-844.YU Yong-jiang,WANG Lai-gui,ZHAO Na.Effect of impulse and bedding on impact toughness of coal[J].Journal of Liaoning Technical University,2006,25(6):842-844.
• [8]俞祁浩,朱元林,张健民,等.冲击速度对冻土冲击韧度的影响[J].岩土工程学报,1997,19(4):21-24.YU Qi-hao,ZHU Yuan-lin,ZHANG Jian-min,et al.Effect of pendulum speed on impact toughness of frozen soil[J].Chinese Journal of Geotechnical Engineering,1997,19(4):21-24.
• [9]马芹永,张志红,蔡美峰.冻土冲击韧度与凿碎比能关系的试验研究[J].岩土力学,2004,2(1):55-58,63.MA Qin-yong,ZHANG Zhi-hong,CAI Mei-feng.Experimental research on relationship between impact toughness and impact pentrant specific energy of frozen soil[J].Rock and Soil Mechanics,2004,2(1):55-58,63.
• [10]LI J C,MA G W.Experimental study of stress wave propagation across a filled rock joint[J].Int.J.Rock Mech.Min.Sci.,2009,46(1):471-478.