###
DOI:
有色金属工程:2021,(3):-
本文二维码信息
码上扫一扫!
非共面断续裂隙类岩石试件破断试验与分析
吴文渊, 贺桂成
(南华大学资源环境与安全工程学院)
Fracture Test and Analysis of Rock Specimen with Non-coplanar Intermittent Fissures
wu wenyuan, he guicheng
(School of Resources, Environment and Safety Engineering, University of South China)
摘要
图/表
参考文献
相似文献
本文已被:浏览 250次   下载 169
投稿时间:2020-08-20    修订日期:2020-08-27
中文摘要: 为了探讨不同数目、倾角下非共面断续裂隙岩石的力学特性和裂纹演化规律,采用RMT-150岩石力学加载试验机单轴压缩含预制裂隙的类岩石试件,结果显示:当主裂隙水平时,增大次裂隙倾角,试样峰值强度先增大后减小再增大;当主裂隙倾斜时,增大次裂隙倾角,试样峰值强度先增大后减小;次裂隙倾角为30°、45°和60°时,第二条次裂隙的存在对试件承载力有一定的强化作用,三裂隙试件峰值强度比双裂隙试件峰值强度大;水平裂隙裂纹萌生的位置不在裂隙尖端且具体位置受到次裂隙的影响;预制裂隙出现相互贯通,主要贯通模式为拉贯通和拉剪混合贯通,破坏模式主要为对角剪切破坏;运用PFC2D数值分析软件进行模拟试验,结果表示数值模型的破坏模式与室内加载下的试样破坏情况基本一致,模拟试验较好的反映了试样受压后裂隙的裂纹演化过程。
Abstract:In order to explore the mechanical properties and crack evolution of non-coplanar fractured rocks with different numbers and inclination angles, the RMT-150 rock mechanics loading testing machine is used to uniaxially compress rock-like specimens with prefabricated fractures. The results show that: when the main fracture is horizontal , Increase the inclination angle of the secondary fissure, the peak strength of the sample first increases, then decreases and then increases; when the primary fissure is inclined, increase the inclination of the secondary fissure, the peak strength of the sample increases first and then decreases; the inclination of the secondary fissure is 30° 、 45° and 60°, the existence of the second secondary crack has a certain strengthening effect on the bearing capacity of the specimen. The peak strength of the three-crack specimen is greater than the peak strength of the double-crack specimen; the location of the horizontal crack initiation is not at the tip of the crack and The specific location is affected by the secondary fissures; the prefabricated fissures appear to interpenetrate each other. The main penetration modes are tension penetration and tension-shear mixed penetration, and the failure mode is mainly diagonal shear failure; the simulation test is carried out using PFC2D numerical analysis software, and the results indicate the numerical model The failure mode is basically the same as that of the sample under indoor loading. The simulation test better reflects the crack evolution process of the crack after the sample is compressed.
文章编号:     中图分类号:    文献标志码:
基金项目:国家自然科学基金项目(面上项目,重点项目,重大项目)
引用文本:
吴文渊,贺桂成.非共面断续裂隙类岩石试件破断试验与分析[J].有色金属工程,2021,(3):.

我们一直在努力打
造,精品期刊,传
播学术成果

全国咨询服务热线
86-10-63299224

杂志信息

期刊简介

相关下载

联系我们

电话:86-10-63299224/63299153

传真:010-63299754

Email:ysjsgc@bgrimm.com

邮编:100160

地址:北京市南四环西路188号总部基地十八区23号楼

关注微信公众号